Products > Test Equipment
Test Equipment Anonymous (TEA) group therapy thread
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mnementh:

--- Quote from: Saskia on July 20, 2022, 03:00:35 pm ---no, when looking at brussels sprouts Seppuku appears to be a viable alternative.
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And Okra. A slimy, hairy vegetable? Not fit for human consumption. Dat's made by the debbil, dat is.

mnem
or maybe Pod People... :-//

Kosmic:

--- Quote from: med6753 on July 20, 2022, 04:06:39 pm ---
--- Quote from: Kosmic on July 20, 2022, 03:54:50 pm ---Arrggg just saw a cheap Tek 485 on ebay this morning, sold as "used" and supposed to be working. I was about to post the link over here but hitted "Buy" instead  :palm:

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No worries. I already have 2 of them plus a junk unit. I think 4 total would be overkill.  :-DD

Edit.....although I do have 3 Type 547's.  ;D

--- End quote ---

That would be my second one since I still have one in the repair queue. Even if it was sold as used and tested, I suspect the second one will also go in the repair queue. Will see.
mnementh:

--- Quote from: m k on July 20, 2022, 04:00:55 pm ---
--- Quote from: mnementh on July 20, 2022, 02:45:56 am ---And Now For Something Completely... ON TOPIC!   

Hi-def HP 54621D pr0n: ARCHIVE: HP 54621D Mainboard Pics

I took oodles of pics of the 54621D mainboard while I was trying to reverse-engineer the video.  Instead of shrinking them all to fit in here nice & friendly, I made an archive of the pics one post at a time so I could keep the res as high as possible.

mnem
 :-/O

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TOP has a bar code label starting 54622-66407-
Some memories and U400 have 54624-
Then the board type ending -66507 is stickered to begin as 54621.   One must wonder how generic those boards really are.
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Given the time they were made, I wonder if the main difference was limited availability of the high-speed RAM for the acquisition section. Hence same PCB, but offer a cheaper version populated with different RAM and other support electronics to be able to produce adequate volume.  :-//

mnem
 :-/O
mnementh:

--- Quote from: Brumby on July 20, 2022, 04:24:33 pm ---
--- Quote from: dl6lr on July 20, 2022, 04:14:45 pm ---
--- Quote from: Kosmic on July 20, 2022, 03:54:50 pm ---Arrggg just saw a cheap Tek 485 on ebay this morning, sold as "used" and supposed to be working. I was about to post the link over here but hitted "Buy" instead  :palm:

--- End quote ---

Well done  :-+

--- End quote ---
I must also add my own...  Well done  :-+   You truly belong in this thread!

--- End quote ---
Medium rare or Pittsburgh-Style for me, please. Oh, also :-+

mnem
"wiggly green lines FTW!" ~bd139
bd139:
Ok just bought a dead Marconi 2022E signal generator from scottrade12. Down the rabbit hole we go  :scared:

Almost certainly it's one of several problems:

1. The osc is duff and this runs the synth and CPU -> run off external one and test then replace it.
2. The power supply is duff -> debug and fix
3. Probably several dead OM345's -> MAR6 MMIC + friggery.
4. Attenuator duff -> kill me with fire.

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