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In theory with a 10X probe the sensitivity of the front corner amplification is nearly doubled compared to using a normalizer. So don't expect to see more effect with a normalizer. Are you sure you

Send me a picture, Morris-if you can. Just need something to roughly ID them. I have a box of old 535/545 bits and pieces I nearly tossed recently but conscience got the better of me (fortunately)-

Hi all, I am in need of the two “Graham Cracker” resistors for the vertical amplifier of a 535A. They are 1.3K with two taps. If anyone has a couple of spares or a 535A carcass that can be a

I have one of those as well, but I think I paid more than $40, but much less than the outrageous price.? The QAM is interesting on an analog scope; I don't recall trying it on a digital scope.? My

Try searching the group files and past messages for the test circuits.? There should be at least two schematics available, because I built one of them, and almost built the other.? I think the one I

I am "trying" to calibrate my 7a26. Per table 5-2 on page 5-6 the instructions tells me to adjust C130 for a square corner. Turning C130 on both channel one or channel 2 have zero effect on the front

Hey Marvin, here's <https://www.ebay.com/itm/132311464608> a QuickStart 8 board, which was used to demo the TDS5/6/700 series initially. It has several interesting signals to look at, including a fast

I sent this message to the hpagilent group, but figured to post here too, since traffic is likely declining rapidly at the old yahoo groups. I have a number of wafer switches from old HP and other

Renee, That is not one of these test boards Marvin is looking for. That is something new that the head of the museum designed. I believe it uses an Arduino to generate the Tek logo. Dennis Tillman

Hi Dennis, The PCB would have to be pried from my Cold, Dead Hand. They are also a work of Art. Ironically, most of my scopes cannot show what the Demo PCB puts out ! Have seen some on EBAY.

Hi Dennis, Those daculators are in all of the later TDS500 TDS600, and all of the TDS700 scopes. 3 per unit. Pictures:

Hi Marvin- evil bay has one for about $30, says Tektronix https://www.ebay.com/itm/112759229192 not sure but the tek museum may have possibilities hiding in microfiche Renée, K6FSB

Sadly, I've been looking for a cover for a 454A myself for a while now with zero success. It seems clear that there are many, many more 'scopes out there than front covers that fit them. I have,

Hi Marvin, Over the years Tek made several of these marketing demonstration boards. I have seen at least 4 or 5. There are probably many more. Each was specifically designed to demonstrate some

Tek used to supply little PCB's with various circuits to test out and let you try out new scopes. They had triggering experiments and other waveform generators to give you some experiencce with new

I will try to remember how it all turned out the meetings went on and on and on the explosion of programmable devices not just proms was an issue the old timers could not grasp and there was a lot of

I had two 485s (I sold them awhile back). I found a cover for each; it took me many years to find them. They are very rare. One was listed with only it's dimensions. The cover for the 485 has no

What is your email address? akhilaadepu143@... or rajuadepu009@... Just a cautious curiosity. 73 de VU2UT -- One of those ... ...

Only found a brief description of the first two: 160-9569-02: Processor (probably with an internal F/W ROM) 165-2456-00: Micro circuit, hybrid These are used only in AM503B and AM5030 I10412-01 is

A quick GOOGLE search shows several Tek hybrids which have 165- part numbers. “The snake which cannot cast its skin has to die.”- Friedrich Nietzsche