Author Topic: Vintage/Classic Chassis/Mechanical Renovation/Restoration Techniques  (Read 30315 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/

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

Old equipment Front Panel 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/

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/


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: September 27, 2017, 10:14:37 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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Online 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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Online 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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Online 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.
Collecting & Restoring all the best vintage Tektronix Scopes & Cal Gear
 
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Offline Addicted2AnalogTek

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Collecting & Restoring all the best vintage Tektronix Scopes & Cal Gear
 

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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