Author Topic: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques  (Read 36202 times)

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Offline VK5RC

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Inspired by these excellent posts in eevblog and my own very limited mainly electronic only repair of some old HP gear of mine, I thought putting some of the exceptional repair posts in one location so that it may help those about to MAINTAIN OUR HERITAGE, (OK that is a bit over the top).
tautech has started an excellent 'manual collection' archive (see sticky topic) and I thought posts that look at the chassis/mechanical areas may be of interest.
All credit to
robrenz  http://www.eevblog.com/forum/testgear/hp-3410a-ac-microvoltmeter-restoration/msg433969/#msg433969
- Cal/Sticker Removal       - Polishing Bakelite knobs
- Polishing BNC                - Engraved Dial Restoration
- Texta from Vinyl            - Analogue Meter Dial Repair
- Scratch from Plastic/Al   - Repair Al Corrosion
- Panel Dent Repair
General Tube/CRO Wisdom!
- Tek Oscilloscope Fault Finding http://www.sphere.bc.ca/test/tek-parts/troubleshooting-scopes.pdf/
  http://www.eevblog.com/forum/testgear/vintage-tek-restoration-pictures-by-martin/
- Soldering Ceramic Strips       - Repair Filament Transformer Tek555
- Plug In Panel Repair 555      - Cleaning Tek Cover Panels
- Rebuild Filer Frame Tek515  - Panel Construction Tek515
- Dust Removal                      - Tube Placement 'Map'

CRT restoration for the brave.
        KE5FX http://www.ke5fx.com/crt.html
- Extreme DMM Repair
   by TiN  http://www.eevblog.com/forum/testgear/restoration-glory-of-keithley-2001-dmm/?topicseen
      http://www.eevblog.com/forum/repair/repair-old-rusty-hp-3458a/
- TiN A Keithly 'God' - now converting to the dark side - HP. A volt nut extreme++
table of cleaning methods and potential problems
 by ModemHead http://mrmodemhead.com/blog/dirty-multimeter-clean-up
 also - methods of getting access to various sections of Flukes
        - repair of 80 series Fluke terminals  http://mrmodemhead.com/blog/fluke-80-series-jack-assembly-rebuild/
Xrunner http://www.eevblog.com/forum/testgear/hp-3435a-extreme-makeover/
  - good clean of a MM, ribbon cable repair
   http://www.eevblog.com/forum/testgear/wavetek-model-271-function-generator-restoration-calibration/msg959179/#msg959179/
- repair of keyboard membrane
Xrunner and PedrodaGr8  http://www.eevblog.com/forum/testgear/keithley-179-trms-dmm-repairrefurb/
 - Repair of Fluke DMM and some great PLASTIC WELDING TIPS reply 72


TEK SCOPE REPAIR (the warm glow of a CRT!)
  - 502/555 +Others  http://www.eevblog.com/forum/testgear/vintage-tek-restoration-pictures-by-martin/
  - 465        http://www.eevblog.com/forum/projects/tektronix-465-repair-and-restoration/msg85387/#msg85387
                  http://www.eevblog.com/forum/repair/tektronix-465/
  - 485        http://www.eevblog.com/forum/repair/tek-485-repair-and-restoration-prologue/
  - 2465B    http://www.eevblog.com/forum/testgear/tektronix-2465b-oscilloscope-teardown
                  http://www.condoraudio.com/wp-content/uploads/Projects/Tektronix-2465B-Oscilloscope-Restoration-Repair.pdf
  -7603      http://www.eevblog.com/forum/testgear/tek-7603-scope-w-7a18-amp-7b53a-timebase-restoration/msg172135/#msg172135

HP/Agilent/Keysight Mechanical Probs
   - 34401  Front-Rear Switch Problem http://www.eevblog.com/forum/testgear/hpagilentkeysight-34401a-2w-problem/
   - 53230 Intermittent Ch 1 BNC connector   http://www.eevblog.com/forum/testgear/comparing-two-hp-z3805a-gpsdo-10-mhz-frequencies-for-lab-use/15/  see reply 28
   - 1980s "clacky" Button Problem http://www.rbarrios.com/projects/hpswitch/
http://www.eevblog.com/forum/repair/quick-fix-my-2c-fix-for-hp-button-key-(in-this-case-hp8662a)/

Old Hard Drive equipment
    - http://www.eevblog.com/forum/testgear/preserving-test-equipment-with-hard-drives/

Old equipment Front Panel / Potentiometer Shaft Repair
    - Engraved Dial Repair see robrenz re 3410 link above
    - Glass Dial Repair http://www.eevblog.com/forum/repair/repro-glass-dial-scale-for-a-hallicrafters-s-38d/
    - Repair of twin shafts  Mnementh reply 9190 on Test Equipment Anonymous (TEA) group therapy thread ~p368

3D Printing Front Panel Parts
    - Phillips PE1539 / PM6670 ; ch_scr uses 3D printer to great application http://www.eevblog.com/forum/repair/late-70s-early-80s-philips-test-gear-bezel-cover-replacement/

Nixie Tubes
    - Rejuvenation (some limits) http://www.tube-tester.com/sites/nixie/different/cathode%20poisoning/cathode-poisoning.htm/
    - and http://www.eevblog.com/forum/repair/rejuvenating-nixies-some-comments-photos/
VFD Rejuvenation
    - http://www.eevblog.com/forum/chat/vacuum-fluorescent-display-rejuvenation/
Fluke DMM repair / restoration;  MrModemhead has excellent website
    http://mrmodemhead.com/blog/fluke-80-series-jack-assembly-rebuild/
    - see xrunners work above re Fluke 179

OLD AC POWER CONNECTORS cubdriver and bitseeker found a great archived webpage
    https://web.archive.org/web/20160802081036/http://www.cs.ubc.ca/~hilpert/e/powerConn/index.html/

Cleaning Dead Battery Goop From Terminals. Abbrev from mnementh
....Scrub battery connectors and PCBs with a toothbrush (or where possible without destroying plastic, a stainless steel detail brush) and Windex (Real Windex, or the good store brand stuff that you can smell has with lots of ammonia in it) to neutralize alkaline deposits and clean battery contacts down to clean metal. Rinse with distilled water and dry on a towel on your dash in the sun, or use your hair dryer/heat gun on low as conditions demand.
.... smear a little silicone dielectric grease (can get cheaply from auto/car part suppliers)  between the batteries and contacts to prevent corrosive relapse common with cleaned battery terminals.

These 'postees' have freely shared knowledge about areas not easily found elsewhere.
Edits; Links corrected, techniques described, Tek scope section added
PS As a suggestion,  include a  photo of the finished item,  and a brief description of an included technique eg removing texta from vinyl
« Last Edit: June 10, 2018, 10:10:18 pm by VK5RC »
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Offline robrenz

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« Last Edit: January 23, 2015, 05:21:56 am by robrenz »
 
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Offline tautech

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Re: Vintage/Classic Chassis/Mechanical Renovation Techniques
« Reply #2 on: January 23, 2015, 07:26:30 am »
shameless self promotion  :-[ 
:bullshit:
Rubbish. You're worthy of of the respect many hold of you for your brilliant work.  :-+

C'mon EEVbees where are other threads worthy of inclusion?
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Offline robrenz

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Re: Vintage/Classic Chassis/Mechanical Renovation Techniques
« Reply #3 on: January 23, 2015, 10:31:25 am »
Thank you very much! 

This Tek 465 repair/restore by ModemHead definitely belongs here  :-+

Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #4 on: January 23, 2015, 11:10:41 am »
Thanks for the link,  Interesting baking soda toothpaste technique.  I have used car polish to get rid of small scratches on a plastic screen before (avoiding lettering) with success but did not take before photos.
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Offline TerraHertz

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Collecting old scopes, logic analyzers, and unfinished projects. http://everist.org
 
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Offline VK5RC

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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #7 on: February 23, 2015, 02:14:58 pm »
@envisionelec and willb on vfd restoration http://www.eevblog.com/forum/chat/vacuum-fluorescent-display-rejuvenation/

KE5FX  on crt restoration 'for the brave'
http://www.ke5fx.com/crt.html
« Last Edit: February 23, 2015, 09:03:13 pm by VK5RC »
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Offline Tim F

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #8 on: February 23, 2015, 05:33:30 pm »
This is probably more retro/ghetto than 'vintage' but i've done a light resto on an old SCR regulated powersupply  :-+
SCR Regulated Powersupply Teardown
 
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Offline tautech

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #9 on: February 23, 2015, 08:39:17 pm »
Nice work Tim.

Welcome to the forum.
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Offline xrunner

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #10 on: February 24, 2015, 12:06:58 am »
Just found this thread last night. Here's a couple of mine if you're interested -

HP 3435A Extreme Makeover

Repair of a Vintage Simpson 461-2 DMM
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #11 on: February 24, 2015, 03:26:13 pm »
Thanks for sharing your work xrunner,  nice cleaning tips re plastic (Mothers Mag Cleaner) and disassembly of multi pole push button switches.
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Offline VK5RC

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Offline xrunner

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Offline robrenz

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #14 on: March 01, 2015, 02:02:40 pm »
Here is a new front panel enhancement of a IET LOM-510A micro ohm meter and a transfer of a fresh calibration to a second unit.
Thread link here
 
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #15 on: March 01, 2015, 08:57:27 pm »
Excellent work guys,  thanks for sharing.
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Offline VK5RC

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Offline zucca

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #17 on: March 06, 2015, 08:51:16 pm »
The glorious Bastard TEK 24xx Scope

http://www.eevblog.com/forum/testgear/tektronix-2465b-oscilloscope-teardown/

with nice explanation on how to upgrade an almost done NVRAM with an FRAM
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Offline Addicted2AnalogTek

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #18 on: May 03, 2015, 11:37:04 pm »
Ah yes, I remember this finding this thread in my venture to restore the first Tek 465 that I acquired!  It wasn't much of a restore job, though - it only needed a thorough cleaning after sitting in someones garage for 20 odd years.. Otherwise it was/still is in practically mint condition mechanically/electrically. All original, too! (Well, other than the Channel 2 X100 attenuator I blew, but the new one looks exactly the same anyway!)  I didn't have to replace a single tantalum on it - yet.

This 468 I picked up may be the same deal, or may be a tad bit more involved.  I'm going to need some outside assistance in diagnosing my small issue. (Don't think it's really worthy of it's own thread just yet..)
When I bought it, it was described as "not able to read input". After a decent cleaning it almost works just fine. The only issue that it has, other than seeming to be quite a bit out of cal, is that channel 2 seems to enjoy doing "the wave" and has "the jitters".   I don't know if this is a crusty adjustment pot somewhere, a tantalum going bad, just bad cal, or what.   It seems to go away while I am adjusting the vertical position slowly (too slow and it's still noticeable). I tried dripping deoxit then IPA down the shaft into it and rotating (multiple cycles of this), which didn't work. I've tried jiggling/putting pressure on all the knobs/switches, etc etc.   The Ch2 vert pos pot does seem to be quite a bit more loose than the CH1 pot, though.

If you all think I should make a new thread for this repair, or post this stuff in a diff thread, let me know.
 
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Offline Addicted2AnalogTek

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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #20 on: July 25, 2015, 09:26:52 pm »
An excellent chassis repair of a Keysight E3649A PSU including plastics repair by HighVoltage
http://www.eevblog.com/forum/repair/brand-new-keysight-e3649a-psu-repair-and-teardown/?topicseen

Edit; Credit to Author of link
« Last Edit: November 27, 2015, 07:51:40 pm by VK5RC »
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Offline tautech

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #21 on: July 26, 2015, 07:06:02 pm »
Nicely documented repair and restoration of an HP 6177C DC Current Source by motocoder
http://www.eevblog.com/forum/repair/hp-6177c-dc-current-source-repair-and-restoration-(complete)/
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #22 on: July 27, 2015, 09:10:32 pm »
http://www.eevblog.com/forum/testgear/fluke-87-button-problem/?topicseen
Repair of intermittent rubber buttons including other links to ModemHead's site and some suppliers of materials for repair of rubber buttons
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Offline VK5RC

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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #24 on: August 13, 2015, 08:25:23 pm »
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #25 on: October 01, 2015, 01:13:58 pm »
TiN defects to the 'dark side'  ie not a Keithley and takes on a battered and bruised HP 3458A!    He is brave.
http://www.eevblog.com/forum/repair/repair-old-rusty-hp-3458a/
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Offline VK5RC

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« Last Edit: November 27, 2015, 07:16:40 pm by VK5RC »
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Offline VK5RC

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« Last Edit: November 27, 2015, 07:15:47 pm by VK5RC »
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #28 on: November 24, 2015, 09:01:54 pm »
c4757p takes on a Tek 485 beauty (but just a little past her prime)
http://www.eevblog.com/forum/repair/tek-485-repair-and-restoration-prologue/
« Last Edit: November 27, 2015, 07:16:16 pm by VK5RC »
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #29 on: November 27, 2015, 07:15:15 pm »
HP 34401 Front Rear Switch Problem   Symptoms = erratic ohms readings mainly in 2W mode
DrFrank et al share wisdom  http://www.eevblog.com/forum/repair/another-34401a-resistance-problem-looking-for-advice
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Offline VK5RC

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« Last Edit: January 16, 2016, 09:38:31 pm by VK5RC »
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Offline VK5RC

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« Last Edit: January 16, 2016, 09:56:45 pm by VK5RC »
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Offline Addicted2AnalogTek

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #32 on: January 17, 2016, 08:06:12 am »
Thought this might be a good link for those who intend to repair Tek 485's, and just some good overall info regarding some of the main repairs that need to be done on them. 

http://rfscientific.eu/sites/default/files/articleextra/tektronix_485_repair.pdf

If you don't think it worthy for this specific list, feel free to remove it or ask me to.
 

Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #33 on: January 17, 2016, 02:26:26 pm »
Looks good,  thanks for sharing your work,  classic Tek. ?
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Offline Martin.M

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #34 on: January 17, 2016, 08:10:47 pm »
"what is a classic Tek?"

the answer follows the definition of Stan Grifiths from vintage Tek in Oregon.
see http://reprise.com/ash/clients2/classic.asp

So we can say that Tek 453/454 was the last true classic Tek made from them.
453, 454 have not one integrated circuit, they are fully discrete made with transistors. It was the time of the highest quality made from Tek ever. Later Types using IC, also it was the begin of "low cost engineering", a lot of plastic parts, plastic fronts instead of anodized aluminium, IC and transistor oftenly not in sockets, and so on. There was some high classified Tek where they continue the high quality engineering (see 7k line with 4 slots), but also the typical low cost Tek, like a 465, 475 and so on. Good instruments of coarse, but made with a look to the money.

greetings
Martin
« Last Edit: January 17, 2016, 08:18:21 pm by Martin.M »
 
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #35 on: January 17, 2016, 08:53:44 pm »
MaritnM, I will freely admit my Tek ignorance, thanks for the information, I found also found the tek-wiki interesting on a brief visit (probing my Tek ignorance)
Still the 485 looks a nice scope and good to see it being saved from the scrap heap, I must admit my only Tek is a 2246 (fully working).
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Offline Addicted2AnalogTek

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #36 on: January 18, 2016, 12:45:12 am »
The webpage I linked in is not one of my repair/restores.  Just some data I am compiling for my near future restorations of 3 Tek 485's I have sitting on my shelf currently (along with 465, 465B, and soon 453/454 & 7000 series).   I will happily start threads for these restorations, as well as others for all of the Cal gear for said scopes that I am collecting.  Most recent thread in progress is the 067-0532-00. (awaiting order of resistors, caps, etc)

http://www.eevblog.com/forum/repair/tektronix-067-0532-00-repairrefurb/

Thanks for the interest, though. I will link in those threads and any web pages I compile of the builds if you would like.

I personally still consider the Tek 485 to be a classic instrument, as it's the top end of the 400 series. The 465 (with discrete vert out amp) is a definite classic. The 468 certainly is not - although I do repair them as well. ( I used one as my Tek scope repair learning platform since it is of no major classical/historical importance! )  The "500 series enclosure" style of cal-gear is definitely a true classic, of which I have several -  106, 184, 191, 284, '0502, etc)  But I've get to get into the total & complete classics of the REAL tube equipment....   soon,  soon..  :-)
« Last Edit: January 18, 2016, 12:53:24 am by Addicted2AnalogTek »
 

Offline Martin.M

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #37 on: February 05, 2016, 04:49:28 am »
yeah ... look to get a 517 "big daddy"

greetings
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Offline magnehh

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #38 on: February 10, 2016, 08:47:48 am »
A little mini-guide here:

How to fix encoder knob on Agilent 33220A

1. Take the whole generator apart. Separate the front panel PCB from the plastic front panel.
2. Carefully bend up the tabs holding the encoder together. Do not bend them farther than just enough to lift the top cover off!
3. With a 1mm flat head screwdriver, carefully bend the wiper contacts a smidgeon upwards. Only a little is usually enough.
4. Optionally, wipe the encoder disc with a clean paper towel. Take care not to leave any traces of paper or other crud from outside in there.
5. Put it all back together.

This is how I got mine to work anyway. The problem is usually NOT the ADC located in the back corner of the main board, as many people seem to think.
 
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #39 on: March 02, 2016, 09:54:27 am »
Good Delrin and plastic bonding comments/advice
http://www.eevblog.com/forum/repair/delrin-repair/
« Last Edit: March 23, 2016, 05:38:23 pm by VK5RC »
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #40 on: March 22, 2016, 10:17:40 am »
Old HP 'clacking'  type button repair
http://www.rbarrios.com/projects/hpswitch/
« Last Edit: March 23, 2016, 05:38:01 pm by VK5RC »
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Offline xrunner

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #41 on: March 22, 2016, 12:02:22 pm »
Old HP 'clacking'  type button repair
http://www.rbarrios.com/projects/hpswitch/

Oh thank you - I may have a need for this fix!  :-+
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #42 on: March 22, 2016, 07:01:14 pm »
No worries,  I saw this post,  it has a few other good suggestions,  worth a look.
http://www.eevblog.com/forum/repair/hp-5335a-non-working-enter-key/
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Offline xrunner

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #43 on: March 22, 2016, 11:16:34 pm »
No worries,  I saw this post,  it has a few other good suggestions,  worth a look.

I've watched his video about 20 times and I swear I cannot see what he did to make the spring work right. Whatever he does is out of the camera. I've watched the spring flex before and after the "fix" and it looks like it acts the same. If there is any difference it sure is small. All I hear is the difference in sound that indicates it works better. I may have to try what I can however, because all the switches on my 5334B are hard to push.  :-//
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Offline Turbon

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #44 on: March 23, 2016, 01:23:28 am »
xrunner, have a look at http://www.eevblog.com/forum/repair/hp-5335a-non-working-enter-key/ the last posts. You have to bend the strip a bit beyond that the button does to get a smal prebend on the strip. As I found out one doesn't need to take the strip out :).

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Offline xrunner

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #45 on: March 23, 2016, 01:55:29 am »
xrunner, have a look at http://www.eevblog.com/forum/repair/hp-5335a-non-working-enter-key/ the last posts. You have to bend the strip a bit beyond that the button does to get a smal prebend on the strip. As I found out one doesn't need to take the strip out :).

Regards

Thanks,

I've torn apart my beautiful 5334B to attempt this fix. What I've been doing is taking out the piece of metal and flipping it upside down and also flipping top to bottom. That works really well - the buttons work like new. I may not finish it today but I'm going to do every single one and get it over with. I'll post how I'm doing it in the other thread.

This fix is not easy, especially for the buttons in the middle of other buttons. Be aware of this if anyone wants to attempt this!

By the way - I could not find a socket that would fit the nuts on the front BNC connectors - I had to mask off the panel around the nuts and use a 14mm wrench - ugh. Is there a socket that fits it? The flats have an oddly small area ...  :o
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Offline Turbon

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #46 on: March 23, 2016, 02:15:39 am »
xrunner - why keep your solution sticky? Move it to the thread to keep the knowledge gathered in one place as the way you did it is already documented by me :). Good to hear it worked for you too but one doesn't need to remove the stick - just bend it in place as described in the thread. 

Thanks and regards
« Last Edit: March 23, 2016, 02:23:49 am by Turbon »
 


Offline tautech

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Offline quarks

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #49 on: April 04, 2016, 11:42:42 am »
Great collection :-+
 

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #51 on: April 19, 2016, 07:40:19 pm »
Another of Rob's fine pieces of work.
Title self explanatory:
http://www.eevblog.com/forum/repair/rejuvenating-nixies-some-comments-photos/
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #52 on: April 19, 2016, 08:35:56 pm »
Thanks , but it is actually Dieter's idea;  Works well, if you have a semi dead Nixie, try it!  :-+

Also if you have a short between the anode and some number or between two numbers there is a technique for zapping a 'whisker' using a DC PSU, starting at 100mA or so at low voltage e.g. 10V slowly increasing the current limit until you burn the whisker off!
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Offline Radio Tech

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #53 on: April 19, 2016, 09:00:53 pm »
Switch and contact cleaning
http://www.eevblog.com/forum/other-blog-specific/40-shop-talk-wafer-switch-cleaning-tips/

Thanks for the mention  :-+

Great content in this thread also. Very nice collection.

Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #54 on: June 11, 2016, 12:39:57 pm »
Membrane Keyboard repair
Xrunner doing more good work , thanks for the heads up!    http://www.eevblog.com/forum/testgear/wavetek-model-271-function-generator-restoration-calibration/msg959179/#msg959179
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Offline Martin.M

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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #56 on: September 18, 2016, 09:43:04 pm »
My Tube Cleaning Technique
Following comment about tube cleaning I thought I would put up on the blog what I actually do, see if it is anything like anyone else does.
The first photo is the before shot, I think the tube has dust but also some cigarette smoke on it.
The first thing I do is a plain water wipe of the top and bottom of the glass envelope, gets rid of a large amount of dirt
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #57 on: September 18, 2016, 09:51:29 pm »
Cont'd
My next is with a cotton bud lightly soaked in window cleaning fluid is to go around the edges of the printed material to remove more dust etc. see photo
I wait for all to dry then lightly brush the printed area with a DRY brush, this will often remove about 3/4 of the dust.
Clean the pins with IPA, a quick finish up with dry cotton bud around the printed area.
While talking to my mate (a dentist - they are really good at adhesives knowledge!) he thinks the reason the print comes off is that nothing sticks to glass well esp paint of any sort, he said except an epoxy paint onto an sandblasted or acid etched  area of glass! It probably isn't the paint dissolving.

If you have any suggestions or let us know what you do it would be of interest.

Edit; typo
« Last Edit: September 19, 2016, 08:50:53 pm by VK5RC »
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Offline SeanB

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #58 on: September 18, 2016, 11:51:31 pm »
Most old tubes were labelled using a rubber roller, with a second hard rubber roller used to spread the printing ink from a reservoir in the print line. The ink used is a solvent based ink, which would stick to glass somewhat, but with time and heat the volatile solvents have all gone, leaving the pigments only there.

They were never meant to be permanent, only to identify the tube in the box, as most uses of these tubes always had a diagram on the chassis or the rear panel inner with a layout of the tubes and types printed on it.
 
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #59 on: September 27, 2016, 10:10:15 pm »
REPAIR OF FLUKE 80 SERIES TERMINALS  MrModemhead  Thanks for sharing
http://mrmodemhead.com/blog/fluke-80-series-jack-assembly-rebuild/
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Offline tautech

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #60 on: September 28, 2016, 09:06:22 am »
Follow Robs repair and restoration of this old Tek classic:
http://www.eevblog.com/forum/repair/restoration-repair-of-tektronix-545/
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Offline Martin.M

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #61 on: November 27, 2016, 05:31:28 am »
thank you, I have seen this entry late bec. I am actually busy with the restoration of some elephant radios  :)
(see HAM+RF area)

greetings
Martin
 

Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #62 on: November 27, 2016, 08:42:03 pm »
140lbs of radio glory - deserves and got a restoration by Martin.M. http://www.eevblog.com/forum/rf-microwave/lf-tube-radio-restoration/   :-+
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #63 on: December 17, 2016, 10:49:52 am »
TerraHertz Listed some small fastener/ bolt/screw suppliers in Australia (NSW)

" I'm lucky to live quite close to these great guys:
Premier Fasteners, 3 Ladbroke St, Milperra 2214  ph: 02 9772 1888
http://www.premierfasteners.com.au/

They have a HUGE warehouse full of fasteners, and are usually happy to take you for a walk in it to find that obscure thing. :) It's quite amusing to take odd screws from some old electronics restoration in there, to see if they have any.  About 50/50 they do/don't.

A couple of others:
The Stainless Shop. 170 Taren Point Road Taren Point. NSW 2229 ph: (02) 9525 1777
 https://www.thestainlessshop.com.au

http://www.smallparts.com.au/
PO Box 2161, MANSFIELD, Queensland 4122
3239 Old Cleveland Road,
Capalaba West (Brisbane Southside),
Queensland 4157
(9am to 5pm Monday to Friday. Phones from 9:30am)
Fax 07 3245 1017 (International +61 7 3245 1017)
Phone:07 3245 7977 (International +61 7 3245 7977)
http://www.smallparts.com.au/store/categories/
sales@smallparts.com.au.  "
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #64 on: December 30, 2016, 09:24:18 am »
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #65 on: February 16, 2017, 08:49:16 pm »
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #66 on: March 02, 2017, 06:54:04 am »
HP Keysight binding post equivalents , Thanks 2N3055
http://www.tme.eu/en/details/bs-244mn-b/4mm-banana-sockets/
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #67 on: March 26, 2017, 09:34:24 pm »
OLD HP Power Sockets
Information brought to daylight by cubdriver and bitseeker, Thanks Guys.
https://web.archive.org/web/20160802081036/http://www.cs.ubc.ca/~hilpert/e/powerConn/index.html/

AKA as    The Oval Connector
              Type 163
              Belden LL14847
              Belden/Volex 17952
              Belden/Volex 17280
Note different manufacturers used different polarity  |O
In the photo as below the centre pin is always ground ,
Type 17280.  Female(cord)=  Live        Earth ;  Neutral :    Male (chassis) Neutral; Earth; Live:      UL , CSA
Type 17952.  Female(cord)=  Neutral ;  Earth ; Live :        Male (chassis)  Live     ; Earth; Neutral. HP etc
     
« Last Edit: March 26, 2017, 09:54:33 pm by VK5RC »
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #68 on: March 28, 2017, 03:07:04 pm »
VFD Rejuvenation
Again a bitseeker find of a great link.
http://www.eevblog.com/forum/chat/vacuum-fluorescent-display-rejuvenation/
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Offline VK5RC

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Offline Cyberdragon

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #70 on: May 08, 2017, 09:56:27 am »
Does anyone know anything about repainting vintage glowing clock hands? I don't know if they were supposed to be radium or some phosphor or  what, but they don't hold any light anymore and fade out in about a second.
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Offline tautech

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #71 on: May 08, 2017, 10:22:03 am »
Does anyone know anything about repainting vintage glowing clock hands? I don't know if they were supposed to be radium or some phosphor or  what, but they don't hold any light anymore and fade out in about a second.
Not that I've tried it but what instantly comes to mind is luminous paints like some use for eyes on trout and salmon flies.
Any good tackle shop that sells fly tying equipment and consumable should have some.
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #72 on: May 08, 2017, 10:45:40 am »
Re luminous paints, an interesting article http://www.vintagewatchstraps.com/luminous.php
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Offline Cyberdragon

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #73 on: May 08, 2017, 11:35:18 am »
Apparently, the material is zinc sulfide, which may or may not be mixed with radium (zinc sulfide still decays). Either way, I'll see if I can source some zinc sulfide paint and just paint it over top, being careful not to touch the original paint due to nuclear material.

EDIT: Well here's a totally reassuring source of ZnS paint... https://unitednuclear.com/index.php?main_page=product_info&cPath=16_17_69&products_id=218  :scared:
« Last Edit: May 08, 2017, 11:46:02 am by Cyberdragon »
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Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #74 on: May 08, 2017, 12:24:30 pm »
Interesting! A year or so ago, I bought and built a geiger-counter kit from http://mightyohm.com/blog/products/geiger-counter/
The 'hottest object I have is an old unused gas mantle - I keep it well away from living areas.  I am tempted to buy some of this powder to see how hot it is.
I bought some' uranium glass - not very hot - dissappointed! Thorium welding rods ticked a little.
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Offline tautech

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #75 on: May 08, 2017, 12:27:55 pm »
The luminous paints and products used in fishing lures AFAIK are not radioactive. If observed in darkness they are dull and non-glowing until "charged" with a light source after which they glow for some period of time. Their responsiveness to the light source and resultant brightness does diminish with age but for paint ons, this can be rejuvenated with just another coat.

I play with a bit of this stuff  ;) and another product that might fit the bill is a luminous thin plastic that could be cut to fit clock hands and stuck on.

Looking for links...............
https://www.hendsproducts.cz/en/891-luminous-materials

Will look for more later.....things to do now.
« Last Edit: May 08, 2017, 12:36:19 pm by tautech »
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Offline Cyberdragon

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #76 on: May 08, 2017, 02:55:49 pm »
The radiation could potentialy destroy the molocules of certain traditional glow paints, I would need scintillator paint. Plus, it's supposed to glow all night anyway (light-charged chemicals can't, which is why tritium is still used in modern watches).
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Offline BeetleJuice

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #77 on: October 18, 2017, 04:00:12 am »
hope i am not off topic , i try to restore an analog multimeter , but it has one of the two copper springs on the needle damaged.
does anyone have any idea how to fix this thing?
 

Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #78 on: October 21, 2017, 06:48:09 pm »
Hi, do you have any analogue meters that could be sacrificed for a good spring? The other source may be watch/clock  springs. I imagine getting the torque correct is the biggest issue otherwise I would imagine the meter will be out of calibration.
Regards Rob
VK5RC
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Offline don.r

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #79 on: March 02, 2018, 12:20:27 pm »
If anyone is interested in some spring metal for their HP keyboards I have started a thread in BSW section: http://www.eevblog.com/forum/buysellwanted/interest-in-hp-button-spring-metal/
Shippers: for the love of Pete and all that is holy, STOP USING UPS INTERNATIONAL!
 

Offline Martin.M

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #80 on: April 02, 2018, 10:13:17 pm »
I will do a little restoration now:

Telefunken E104Kw4/7 , a 90kg shortwave receiver build in Sept. 1953
http://www.eevblog.com/forum/rf-microwave/sw-radio-restoration-telefunken-e104/
« Last Edit: April 03, 2018, 05:17:34 am by Martin.M »
 

Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #81 on: April 07, 2018, 05:36:38 pm »
Mnementh shows a great restoration of an old scope dual shaft control. Dremel and McGiver at the ready :-+
See TEA thread about page 368 reply no 9190.
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Offline Chester chastain

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #82 on: July 09, 2018, 09:59:55 am »
Hi I am new to this I need help with a Sony integrated stereo amplifier ta-av521 I have good speakers when I hooked them up I have cracking and popping coming out of one side (left side) any help on this problem please
 

Offline VK5RC

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Re: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques
« Reply #83 on: July 10, 2018, 08:44:03 pm »
Hi Chester, welcome to the forum,
I would put this into the main Repair area as a new topic , perhaps the make, model and brief description of the problem as the subject. In the 1st post a more detailed description of the problem also what have you tried, what is your level of electronic experience. Also consider putting,  is there anything that make the static worse or better eg moving something, have you taken the covers off - power off and AC plug out of course - and had a good look? When it began was something happening eg lightning in the area or did it just start like this? What test gear, if any, do you have access to? Has it been dropped or water/cat exposure etc. Lots of issues that can give a clue to you and others.
This site appears to have both the Service and Users manuals. https://www.hifiengine.com/manual_library/sony/ta-av521.shtml
This area/topic is more about how to get the chassis/mechanicals looking better etc.

Good hunting. Sounds a little bit like a loose joint - a 'dry' solder joint . Can be hard to see /find - fixing electronics can take quite a bit of time/effort.

regards rob VK5RC
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