Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 14562499 times)

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Offline hyl

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90250 on: May 08, 2021, 01:45:37 am »
Tektronix 495p fix and alignment

https://sites.google.com/site/linuxdigitallab/home/tektronix-495p-fix-and-alignment

I try attaching img... failed.  But I'm one of you long time ago...  |O |O |O |O |O
« Last Edit: May 08, 2021, 01:55:19 am by hyl »
 

Online xrunner

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90251 on: May 08, 2021, 01:49:12 am »
Tektronix 495p fix and alignment

I try attaching img... failed.  But I'm one of you long time ago...  |O |O |O |O |O

Very nice write-up and documentation.  :-+
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Online tautech

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90252 on: May 08, 2021, 02:55:27 am »
The HP 8570A arrived on Tuesday, naked and in the rain as the Palletways guy had cut it off the pallet in order to get it to my door. Oh well... time to sit it by the fire for a day or so.

Finding a space for the thing, even on a temporary basis, is a problem, as it's absolutely huge (full rack, 4U, 600mm deep, and 20-25kg).

As I suspected, the fuse looked like this:




Now I just need to learn how to use it, so I can test if it works as it should. I did notice the CRT was a little unstable on initial power up, so there's likely some connection/condensation/crapacitor issues to look at.

The bottom left corner of the screen is slightly darkened, but not to the point it's a problem. I think it'll clean up nicely!


congradulations!  a fine piece of gear.

but study this picture......because when you open the case some of these will fall out......and you will need to collect them to epoxy back on the rotary discs.  and you will be hating life when you reassemble the fecking things.  but you will be loving life after.
About that pic.....lots lots more of that stuff was here:
https://www.eevblog.com/forum/repair/hp-8569-spectrum-analyzer-repairs/
However as a result of externally hosted pics it's the best reason to host pics here even if it is a bit more trouble.
Sue AF6LJ hasn't been active since last Nov and requests for images in that thread to be fixed are now likely not to happen.  :(
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Offline bitseekerTopic starter

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90253 on: May 08, 2021, 03:20:16 am »
LOL I should have taken a screen shot, but I got an "error giving thanks" on that last post by bitseeker. Never seen that error before.  :wtf:

Tried a second time and it worked.

I usually see it on mobile browser, but I don't think I ever have on desktop. :-//
TEA is the way. | TEA Time channel
 

Offline bitseekerTopic starter

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90254 on: May 08, 2021, 03:21:44 am »
Tektronix 495p fix and alignment

https://sites.google.com/site/linuxdigitallab/home/tektronix-495p-fix-and-alignment

I try attaching img... failed.  But I'm one of you long time ago...  |O |O |O |O |O

Welcome to the thread and nicely done. I always found the knob placement on the 495p interestingly asymmetric.

And added to POI.
« Last Edit: May 08, 2021, 03:25:07 am by bitseeker »
TEA is the way. | TEA Time channel
 

Offline 0culus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90255 on: May 08, 2021, 04:55:45 am »
I'm not even going to attempt to catch up on this thread, but thought I'd drop in to say howdy. I've had a few things follow me home recently. A friend of mine gave me a Type 454 that he had lent to another friend and it blew up on him. That repair is still in progress. The +75 volt regulator failed short and let the +150 unreg onto the +75V rail and killed a bunch of transistors, mostly in the vertical output amp, but also a few in the preamps. Also of note, this failure caused the HV to totally wig out and arc violently inside the HV cage, around the output to the anode. Replacing the failed regulator fixed that fortunately and nothing was damaged in the HV.

I also recently had a NICE Type 547, cart, many plug ins, and manual follow me home from an estate sale. Just did a little touch up adjustments to the time bases and the sweep mag registration, and she's been put to work in the lab!

Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90256 on: May 08, 2021, 05:20:10 am »
   
https://imgs.xkcd.com/comics/golden_hammer.png

This one's for bd...  >:D

mnem
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Offline Brumby

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90257 on: May 08, 2021, 06:02:06 am »
Dietary cooking time.
Bean Stew.

hacked tomatos, 1 pound minced meat, 3 peppers, mushrooms,onions, beans, hand full black pepper, hand full hot paprika spice, Oregano, basil, bit of salt, 1 Habanero,1 Carolina Reaper.

Fire in the hole!
 
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Offline rejectmonke

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90258 on: May 08, 2021, 06:45:06 am »
research has always led me in a circle back to the pricey "in principle not relative" mso5074   |O
 
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Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90259 on: May 08, 2021, 08:10:31 am »
I'm not even going to attempt to catch up on this thread, but thought I'd drop in to say howdy. I've had a few things follow me home recently. A friend of mine gave me a Type 454 that he had lent to another friend and it blew up on him. That repair is still in progress. The +75 volt regulator failed short and let the +150 unreg onto the +75V rail and killed a bunch of transistors, mostly in the vertical output amp, but also a few in the preamps. Also of note, this failure caused the HV to totally wig out and arc violently inside the HV cage, around the output to the anode. Replacing the failed regulator fixed that fortunately and nothing was damaged in the HV.

I also recently had a NICE Type 547, cart, many plug ins, and manual follow me home from an estate sale. Just did a little touch up adjustments to the time bases and the sweep mag registration, and she's been put to work in the lab!

Welcome back and that 547 looks real good. I'm jealous. I'm still fighting with mine. PSU issues.  :phew:
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Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90260 on: May 08, 2021, 08:12:51 am »
Holy crap, the blog is S-L-O-W. Everyone else seeing the same?  :-//
An old gray beard with an attitude.
 
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Offline beanflying

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90261 on: May 08, 2021, 08:22:06 am »
Holy crap, the blog is S-L-O-W. Everyone else seeing the same?  :-//

Yep Server load/database issues. Let's all blame @bd until he replies :-DD
Coffee, Food, R/C and electronics nerd in no particular order. Also CNC wannabe, 3D printer and Laser Cutter Junkie and just don't mention my TEA addiction....
 
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Online tggzzz

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90262 on: May 08, 2021, 08:28:57 am »
Tektronix 495p fix and alignment

https://sites.google.com/site/linuxdigitallab/home/tektronix-495p-fix-and-alignment

Welcome, and that's good work.

Can I suggest that you create a new topic in the "Repair" subforum, and use that to point to your reference. That will avoid your useful information being lost in the middle of this thread.

Only a few nutters follow this thread, but far more people will be interested in your work!
There are lies, damned lies, statistics - and ADC/DAC specs.
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Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90263 on: May 08, 2021, 08:29:45 am »
Holy crap, the blog is S-L-O-W. Everyone else seeing the same?  :-//

Yep Server load/database issues. Let's all blame @bd until he replies :-DD

Bd must have heard you. It seems to be OK now.  :-DD
An old gray beard with an attitude.
 
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Online bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90264 on: May 08, 2021, 08:50:16 am »
Wasn’t me. I was asleep  :-DD
 
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Offline tonyalbus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90265 on: May 08, 2021, 08:52:27 am »
LOL I should have taken a screen shot, but I got an "error giving thanks" on that last post by bitseeker. Never seen that error before.  :wtf:

Tried a second time and it worked.

Yes i have that sometimes too, but mostly on my iPad, on pc no problem.
it is a weird message like.. '' error thanking your thank you" or something.'
Electronics enthusiast, TEA and Radio Amateur (PE1ONS)
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Offline mansaxel

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90266 on: May 08, 2021, 09:26:09 am »
LOL I should have taken a screen shot, but I got an "error giving thanks" on that last post by bitseeker. Never seen that error before.  :wtf:

Tried a second time and it worked.

Yes i have that sometimes too, but mostly on my iPad, on pc no problem.
it is a weird message like.. '' error thanking your thank you" or something.'

The strains of forum software written in PHP all have these reliability issues. A lot of it comes down to PHP being so deceptively easy to parse for people that should not be let near an IDE, that they all of a sudden start writing add-ons. And since these add-ons clearly scratch an itch for a lot of forum users, if not admins, they  get installed. A lot.

Now, testing every possible combination of this maquis of add-ons is nigh impossible, so people are left to their own figuring out what breaks what (in obvious ways and in not so obvious ways, 34221 posts later).

Stack on top of that a few other assumption-breakers, like caching, time-outs, load balancers, and there's a race to the bottom.

BD139 wrote a couple posts back something to the effect of "all forums suck". I agree. They are at best "tantalizing UI enhancements" to communication problems that Usenet manages better.

I really should get my own Usenet server running. I do however think that a 2-way gate between Usenet and Simple Machines in every way would fulfill all elements of suck detailed above.

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90267 on: May 08, 2021, 10:04:09 am »
LOL I should have taken a screen shot, but I got an "error giving thanks" on that last post by bitseeker. Never seen that error before.  :wtf:

Tried a second time and it worked.

This is a button on my mobile version, I'll post a screenie later
nuqDaq yuch Dapol?
Addiction count: Agilent-AVO-BlackStar-Brymen-Chauvin Arnoux-Fluke-GenRad-Hameg-HP-Keithley-IsoTech-Mastech-Megger-Metrix-Micronta-Racal-RFL-Siglent-Solartron-Tektronix-Thurlby-Time Electronics-TTi-UniT
 

Offline BU508A

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90268 on: May 08, 2021, 10:05:00 am »
Notifications via email for PMs is back. Well, at least for me.
A few minutes ago I've found two emails in my inbox from PMs from Tuesday and Wednesday.

Perhaps fixing this issue has caused the slow-down of the forum?  :-//
“Chaos is found in greatest abundance wherever order is being sought. It always defeats order, because it is better organized.”            - Terry Pratchett -
 

Offline BU508A

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90269 on: May 08, 2021, 10:09:33 am »
Tektronix 495p fix and alignment

https://sites.google.com/site/linuxdigitallab/home/tektronix-495p-fix-and-alignment

I try attaching img... failed.  But I'm one of you long time ago...  |O |O |O |O |O



Whoah!  :wtf:
This poor scope has some serious battle scars and dents!
One should use these things to watch wiggly lines, not playing "How far can I throw this thing!" or so...

Welcome to the House of TEM¹, take a seat, have some cookies, rabbits will be served every second Sunday or so. :-)

¹Test Equipment Madness
“Chaos is found in greatest abundance wherever order is being sought. It always defeats order, because it is better organized.”            - Terry Pratchett -
 
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Online McBryce

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90270 on: May 08, 2021, 10:21:54 am »
Only a few nutters follow this thread,

I resent resemble that comment!

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Online AVGresponding

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90271 on: May 08, 2021, 10:24:16 am »
Tektronix 495p fix and alignment

https://sites.google.com/site/linuxdigitallab/home/tektronix-495p-fix-and-alignment

I try attaching img... failed.  But I'm one of you long time ago...  |O |O |O |O |O



Whoah!  :wtf:
This poor scope has some serious battle scars and dents!
One should use these things to watch wiggly lines, not playing "How far can I throw this thing!" or so...

Welcome to the House of TEM¹, take a seat, have some cookies, rabbits will be served every second Sunday or so. :-)

¹Test Equipment Madness

Note the US Navy asset label... there's your explanation for its battered visage!

Also welcome to the enablement thread, hyl    :popcorn:
nuqDaq yuch Dapol?
Addiction count: Agilent-AVO-BlackStar-Brymen-Chauvin Arnoux-Fluke-GenRad-Hameg-HP-Keithley-IsoTech-Mastech-Megger-Metrix-Micronta-Racal-RFL-Siglent-Solartron-Tektronix-Thurlby-Time Electronics-TTi-UniT
 

Online bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90272 on: May 08, 2021, 10:32:04 am »
LOL I should have taken a screen shot, but I got an "error giving thanks" on that last post by bitseeker. Never seen that error before.  :wtf:

Tried a second time and it worked.

Yes i have that sometimes too, but mostly on my iPad, on pc no problem.
it is a weird message like.. '' error thanking your thank you" or something.'

The strains of forum software written in PHP all have these reliability issues. A lot of it comes down to PHP being so deceptively easy to parse for people that should not be let near an IDE, that they all of a sudden start writing add-ons. And since these add-ons clearly scratch an itch for a lot of forum users, if not admins, they  get installed. A lot.

Now, testing every possible combination of this maquis of add-ons is nigh impossible, so people are left to their own figuring out what breaks what (in obvious ways and in not so obvious ways, 34221 posts later).

Stack on top of that a few other assumption-breakers, like caching, time-outs, load balancers, and there's a race to the bottom.

BD139 wrote a couple posts back something to the effect of "all forums suck". I agree. They are at best "tantalizing UI enhancements" to communication problems that Usenet manages better.

I really should get my own Usenet server running. I do however think that a 2-way gate between Usenet and Simple Machines in every way would fulfill all elements of suck detailed above.

Usenet was even worse due to the whole eventual consistency thing.

What we need is some community software that isn’t a total sack of dung. Something that has an open API, federated authentication, structured discussions, doesn’t rely on bbcode and is designed with archival first in mind.

Anyway screw all that high tech guff. I’m off up the ridgeway in the pissing rain with a shit shovel, sandwiches,  soup and my trangia  :-DD
 
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Offline Peter_O

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90273 on: May 08, 2021, 11:03:03 am »
Note the US Navy asset label... there's your explanation for its battered visage!
Also welcome to the enablement thread, hyl    :popcorn:


If massively battered stuff is your prefered challange:
Sometimes there are lots of HP devices on the german bay system posted by Israelian sellers looking like beeing fished from military dumpsters. Including desert dust and bullet holes.   ;D
 

Online AVGresponding

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #90274 on: May 08, 2021, 11:07:17 am »
Note the US Navy asset label... there's your explanation for its battered visage!
Also welcome to the enablement thread, hyl    :popcorn:


If massively battered stuff is your prefered challange:
Sometimes there are lots of HP devices on the german bay system posted by Israelian sellers looking like beeing fished from military dumpsters. Including desert dust and bullet holes.   ;D

Yes, those listings make it onto eBay UK also. I haven't had the courage to buy any of them yet!   :-DD
nuqDaq yuch Dapol?
Addiction count: Agilent-AVO-BlackStar-Brymen-Chauvin Arnoux-Fluke-GenRad-Hameg-HP-Keithley-IsoTech-Mastech-Megger-Metrix-Micronta-Racal-RFL-Siglent-Solartron-Tektronix-Thurlby-Time Electronics-TTi-UniT
 


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