I need someone to refresh my memory. The old Tek scopes with the separate power supplies (555 and similar) had an unusual filament voltage regulator that operated with a saturable core reactor. Part o

Sure enough, each edge connector is a small card with some components. What a story! See above. And, Michael H. sent me the following information: The 7S14 was originally designed as 5S14 and because

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 "Freon TF

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 sq

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 fin

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, 533A,

Eventually I have got it! The entire story is reported at http://space.tin.it/clubnet/egirland/tek475/vpots/vpots.html I want to thank you once again the group for the support and in particular Mr. Fr

I have a 454 that has no vertical deflection on ch1 or ch2, using another scope I am able to trace signal from the preamps to the deflection plates. The sweep appears to be in good shape and the trace

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 Lewis 1317

Yoohoo. I got a pair of NOS, Tek-boxed 8608 tubes for the vertical of my 556! They work great. Has anyone else had an 8608 fail on them. My bad one had a grid short. I noticed it because the vertical

Hi, my name is Doug and I am looking for a User Manual and Service manual for a Tek 454 Scope. I had seen a source on the web but can't seem to find it now. Does anyone know were I might find these ma

Congratulations TekGroup! We've hit 100 members! ----------------------------------------------------------------- Michael Dunn | Surround Sound Decoder & Stereo Enhancer Cantares | Self-Amplified Spe

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 t

I have a 7104 and now a 7103 that have the same readout problem. The readout is not visible unless the intensity knob is turned CW to the "pulsed" position and then pushed against the stop. On the 710

Just a little poll of sorts: I'm wondering where we all find old equipment -- at least the stuff we get for real cheap! I and a friend on this list have found pretty much all our stuff at "garage sale

don't need a Another point: the 46x, 47x series just wasn't as sharp as the tube scopes! or even and especially - the 454, 454A. Some engrs. think the 454A best 150 MHz scope ever (2mV/DIV, all the de

Hello, I have been pulling problems out of a 465 that I recently acquired. The last remaining problem is the inability to get a sharp focus on the trace with any combination of intensity, focus or ast

Does anyone know where I can pick up the GPIB OPT 10 for the Tek 2230 or the RS232 option? Thanks, Vince Coppola

Hi All My old faithful 7904 has started to have a little problem with the display. It will run for hours or days with no problem. Then it will start to drift the display up and down, this is the trace

I believe you're right, Stan. I'd heard both explanations. Actually, the geometry story doesn't pan out well if you've ever seen one of the guns outside of the jug. the mesh is hemispherical in shape.