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Unfortunately, the IC vertical designs don't have a thermal compensation adjustment. Again, the 7904 is an example, and my 7904s do suffer from swimming readouts.

Some of the supplies have spark gaps as well as neon lamps - an example is the 7904. I'm not sure if they are to protect the scope from the power line, or to protect the power line from the scope's HV

The 040-0686-01 mod kit for 7600 series plugin lamps uses an LM309K between +8 volts in the mainframe and +5 delivered to the plugin compartments for lamp power. Derating of the range of acceptable

The company I work for has sold custom flat panel displays to another major US test equipment manufacturer (use your imagination here). About 5 years ago, their info said their analog scope CRT life

Miroslav Pokorni wrote: Your point noted.. as I haven't gotten around to using the meter - can't say how many caps are marginal. There's a good discussion of the subtleties in following links, incl.

I also have one of these Plug-Ins. Now I also need to figure out how to make it work !! BTW, I have a 7D01 plug-in, but condition unknown. Someday I'll plug it in and see if it works. (I had the

No, the plug in lights to NOT light in a 7603 frame, this was intentional, but I don't know the orignal thinking that led to it. 7A26 and similar format vertical plug ins don't need it, and the 7B53A

The only two Tek scopes that I can remember having more than one power switch are the 507 and 517 and I don't really recall what the real story was on those. I think they were separate switches for

but ...I remember reading somewhere that the 7000 plugins were designed to be lit, but the poor reliability of the bulbs and the difficulty in changing them caused Tek a rethink and the idea was

There is a listing in the catalog for the 040-0686-01 "lights power supply for 76XX mainframes", but I haven't been able to find out anything about it. I wonder if this existed because the 76XX +5V

Hi Craig, my 7603 doesn't do it either. The backplane has two empty pins, where you could connect some 5V source. I thought about connecting that to the stabilized +5V and to ground. Finally i didn't

Hi folks Is the 7603 supposed to light up the buttons on the plug-ins? Some of my plug ins definitely have lights installed in the push switch assemblies, but no light emerges. Thanks Craig

Don't feel bad about that one Craig. $132 for a pair of 12AU6 - matched Tektronix or not - is foolishness. That's got to be the audio guys again. Phil

Craig, You can call that 'e-bay syndrome'. I have seen 7000 series plug ins reaching $150 while there were similar ones with $10 opening bids without bidders. Regards Miroslav Pokorni

I'm astonished! I was bidding on a NOS pair of Tek 12AU6 tubes on eBay - a matched pair. Nice for my Type L plug in (didn't really need them, but good insurance). I thought that given the price of NOS

I believe that those digitizers were used to measure all sorts of parameters during test, so a number of them was consumed for a single test. My understanding was that they were lowered down the hole,

Hello my friends, As saying says, 'early bird gets the worm'! I start working at 7:00AM... yes, I know it is early in the morning. But it has its advantages: I stop working at 3:05PM (so I have lots

I have seen something similar in early 70s. That was in a lab of a reasonably fancy institute, but that lab did not rate real Tektronix, they just had a copy. I was there to install a printer

Hello Jose, I believe that 7A16P requires programming through backplane, otherwise it would not work. That is a plug intended for 7612 and 7912. You would need a plain 7A16 (without P). Regards

In most (?) mail clients, reply-to-sender won't work because of the Reply-To: header inserted by the Yahoo software. Those using procmail may want to use a rule like this: : * ^Mailing-List: list