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Hi Morris, I am sure Tek made a silicon replacement kit for those seleniums. I am sure I have a copy of it on microfiche. I will check that out at my next free moment and see about taking my

I have picked up a 127 preamp power supply that is used to power a couple of 1- or letter plugins for use as instrument amplifiers. It's quite a boatanchor and seems to work OK but I want to replace

Hi Doug, Are you really sure Tek still offers older manuals on microfiche? Last time I checked I thought they had discontinued that, too. Stan w7ni@... dhuster@... wrote:

Hi Paul, I can't help you with this one. You might try Deane Kidd <dektyr@...> Stan w7ni@... ke4dnk@... wrote:

Hi, Doug, Check out the "Q&A" column in the February 2001 issue of "Poptronics" magazine (formerly "Popular Electronics" and "Electronics Now" magazines) for a list of manual sources. Also check

I need a transformer or a working power supply for my 7904 scope.The serial # is above B260000. The transformer is T1310, part # 120-0742-00. The power supply assembly is # 620-0461-00 Paul

Thanks to everyone who replied, I've contact several and am looking for the best price Doug manual manual

on this, ...................................................................... The trace starts on center of screen and runs to right side, Vertical seems to be ok. The output transistors voltages

Hi Mike, Good news! It is always great to hear of a success like yours. More comments below . . . mtmpsmp@... wrote: Well, there a

help. pins vertical

Thanks Emanuele for your extensive coverage for cleaning the pots of an 475. I'm sure more people appreciate this nice stor, because it is one of the most common failure's in 465, and 475 scopes,

575 556? I would love to have a 556. They are both massive double beam machines but there are quite a few differences. The 556 is in one piece while the 555 is quite a bit larger and has a separate

output amplifier. First thing to check is the collector load resistors that of gain Dean, thanks for your quick response. I m not sure which collector load re

Bill, Don't play with the gain. Both channels are affected the same way, and that pretty much says that the problem is in the vertical output amplifier. First thing to check is the collector load

Hello, I just discovered this group and look forward to participating. Right now I can use some technical help, though. I am wrestling with a TEK 465 in the 32xxx serial # range that seems to work

Hello, I just found out about this group and decided to join. I've got an interesting collection of Tek scopes and other stuff, consisting of three RM561As, a 551, a 181A time mark generator, a 106

Do you know how the 555 differs from that other monster, the 556? Please tell us something about your spectrum analyzer! At least 2 of us here have 549/1A4 combos! Yes, a nice piece of

When I recently joined this group, I read alot of the old posts. I saw in one the mention that Freon-TF, used to clean fans, wasn't available anymore. Where I work, they use something called

Welcome aboard, Morris. I'm just a novice collector, and only have one scope (a late 535A, Scopemobile, and a few plugins). But, it's in almost mint condition and I have all the probes, cords, and

I'm very pleased to have found this group as I am a great lover and collector of vacuum tube Tek scopes here in Melbourne Australia. My collection includes examples of the 310A, 502, 524AD, 529,