Products > Test Equipment
Test Equipment Anonymous (TEA) group therapy thread
tautech:
--- Quote from: bd139 on May 19, 2018, 11:40:48 pm ---Fair points. The goal would be to produce a new HT transformer for it wound on a COTS E core. The ones in these have a Paxolin base which is nasty. I’ve done a couple of these before successfully.
--- End quote ---
That's where the L info on the manual could provide guidance on core selection but it's gunna be a suck it and see exercise IMO. Better you get those R and L measurements from a working one that you have. Then if you get a stuffed one the turns count will give further info. :)
Wouldn't/couldn't you make a FR4 base ? I found the paxolin fine......treated with care and respect.
Or are you having trouble with those fingers again ? :P ;D
mnementh:
--- Quote from: bd139 on May 19, 2018, 11:40:48 pm ---Fair points. The goal would be to produce a new HT transformer for it wound on a COTS E core. The ones in these have a Paxolin base which is nasty. I’ve done a couple of these before successfully.
I think I’ve negotiated another dead one off someone. They’re multiplying. Well apart from the multipliers.
--- End quote ---
Can you re-engineer around the Tek/Murata 152-0806-00 multiplier on these? I think I bought the last NOS one in captivity for my 2230 about a year ago when I started on this latest stalled rebuild, but I still see them and the 152-1046-00 and the 152-0791-00 being sold "Used, Tested" on fleaBay; usually around $30-40.
[EDIT]
And isn't good ol' acetone the recommended solvent for phenol-based resins like Paxolin? I realize it may also strip the shellac off the wires, but who cares?
[/EDIT]
Cheers,
mnem
*poot*
tautech:
--- Quote from: mnementh on May 19, 2018, 11:13:13 pm ---I did that same job on my Tek 2230 a decade ago; then replaced the HV multiplier flyback again this last time I worked on it. Altogether a right crunky affair; I get that the whole mess allowed them to run the beam at lower current, therefore better response and sharper focus at higher frequency... but damn. It's one of those designs that just seems to taunt Murphy.
And worse yet, they "inspired" the designers of your scope to follow in the same ill-advised foosteps...
mnem
Not a fan. Not a grommet, either.
--- End quote ---
It's a pretty standard CRT design and mostly reliable with modern components but the EHT and PDA is still often a primary failure point in CRO's, such are the stresses the components are under.
It's little wonder these days scope displays are nearly exclusively LCD.
Specmaster:
--- Quote from: bd139 on May 19, 2018, 11:16:53 pm ---
--- Quote from: mnementh on May 19, 2018, 11:13:13 pm ---And worse yet, they "inspired" the designers of your scope to follow in the same ill-advised foosteps...
--- End quote ---
Telequipment were owned by Tektronix when this scope was made. I think some of the design people worked on the 22xx scopes so that might be where your problem is. Really shitty British engineering :-DD
--- Quote from: Specmaster on May 19, 2018, 11:14:13 pm ---Essex to the rescue again
--- End quote ---
To quote a friend of mine who was dating a girl in Billericay; "Essex made me itchy". All is not forgiven yet :-DD
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Humph with all recent murders in London, your more likely to survive a trip out my way than in your area, the locals here are more friendly, once they attack you, they give directions to the hospital 😇
med6753:
--- Quote from: xmo on May 19, 2018, 08:22:32 pm ---Test Equipment Anonymous group therapy? This whole thread is a sham!
It's like you walk up to a door that has an "AA" sign on it but when you open it and go inside the first guy you see is Sam Malone.
And everybody knows your name.
Thankfully, I don't have a problem and I don't need any help.
--- End quote ---
The mere fact that you are here indicts you as guilty. So what's you addiction? Post up! Mine is 7 vintage Fluke DMM's and 5 analog scopes so far. Plus all my other junk. And I'm always trying to make room for more.
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