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Re: I built a TM500 mainframe tester, and updated the design. Someone might find this useful?
Jared, Beautiful workmanship. Who does your boards? Wonderful project, Thanks for sharing! -- Michael Lynch Dardanelle, AR
By Michael W. Lynch · #175643 ·
Re: Tek 2465b two probes showing slightly different voltages and phases
Enjoy that scope, Mark -- it's an amazing instrument. Consider that it is so capable that the finite speed of light was the root cause of your delay problem! Nice to own a scope where you start
By Tom Lee · #175642 ·
Re: Tek 2465b two probes showing slightly different voltages and phases
I wanted to thank all of you for your helpful suggestions. It has been years since I last posted anything and I really appreciated how much everybody was willing to share their knowledge. Best
By Mark Hatch <mark2382@...> · #175641 ·
Re: I built a TM500 mainframe tester, and updated the design. Someone might find this useful?
Jared, did you write that manual? Man, that is a piece of art! CONGRATULATIONS! You inspired me to write better manuals for my projects O_O ---8<---Corte aqui---8<---
By Alexandre Souza · #175640 ·
Re: Tek 2465b two probes showing slightly different voltages and phases
Jean-Paul, I think you may have missed several posts. His problem has already been diagnosed -- he has been using two completely different models of probes, of grossly different lengths, and of
By Tom Lee · #175639 ·
Re: I built a TM500 mainframe tester, and updated the design. Someone might find this useful?
Bravo for sharing that. It looks very impressive! Paul
By Paul Amaranth · #175638 ·
Re: Tek 2465b two probes showing slightly different voltages and phases
Its possible to have a precise propagation delay compensation in 2465B. I recall it is in one of the test or options accessed in the CAL menu. For the test of channel match, use a single 50 ohm ext
By Jean-Paul · #175637 ·
Re: Spectrum analyzer Tektronix 7L13 on mainframe Tektronix 7603
Hi everybody, where can i find the 52.5 MHz crystal? It is hard to find! Thanks and happy new year Attilio
By Attilio · #175636 ·
Re: I built a TM500 mainframe tester, and updated the design. Someone might find this useful?
Thanks for sharing, Jared! Enviado do meu Tele-Movel Em qui, 31 de dez de 2020 16:27, Jared Cabot via groups.io <jaredcabot= [email protected]> escreveu:
By Alexandre Souza · #175635 ·
I built a TM500 mainframe tester, and updated the design. Someone might find this useful?
Hi all, I have been accumulating TM500 modules and mainframes for a little while, so I recently finished building an 067-1201-99 TM500 mainframe tester from the Tek construction notes floating around.
By Jared Cabot · #175634 ·
Re: Rescuing 500s from tube snatchers/scavengers - how much is it worth
That was done because people were selling things for $1 and $75 shipping to get around the FVF. While it's not much, I object to them charging tax then getting their FVF off of the price with the tax
By Vince Vielhaber · #175633 ·
Re: Tek 2465b two probes showing slightly different voltages and phases
Jon, Good suggestion... two 50ohm cables, same nominal length, split at the oscillator and fed into channels 1 and 2 gave the exact same voltage and phase. Even at 10x mag they overlaid each other. So
By Mark Hatch <mark2382@...> · #175632 ·
Re: PG506 calibrator generator voltage error
Simon: With perhaps 100 TM500 modules and 2 PG506, I have NEVER had a bad PSU lytic in a plugin. The scope and mainframe TM500/5000 PSU caps DO age, Symptom of bad caps, high PSU ripple, low votage on
By Jean-Paul · #175631 ·
Re: Fun with the type S plugin
Hello Morris, You are right when you say the S plugin was not common. I'm sure very few exist today. The tube circuitry you describe sounds like it is working fine. This plugin was an interesting mix
By Dennis Tillman W7pF · #175630 ·
Wanted: TDS3000 hub assy. for handle
One of the handle hubs is broken in my TDS3014B (up-hacked of course) and it just doesn't glue happily. Does anyone have a spare? This is item 6 in the explosion drawing on page 10-13 of the TDS3000B
By David C. Partridge · #175629 ·
Re: Rescuing 500s from tube snatchers/scavengers - how much is it worth
Yes, and. E-Bay's own policies drive prices up and heavily influence the direction of the sellers; who inevitably get very creative to maintain their desired profit margin. Make a rule and there will
By Michael W. Lynch · #175628 ·
Re: Rescuing 500s from tube snatchers/scavengers - how much is it worth
eBay changed their policy in response to the 1$ items with 200$ shipping fees. I remember that from about ten years ago.
By Snappy · #175627 ·
Re: PG506 calibrator generator voltage error
Simon, I would leave them as is. You might do more harm than good. Those readings could be off due to meter / measurement error or those parts could have been that way all along. "if it ain't broke,
By Michael W. Lynch · #175626 ·
Re: Tek 2465b two probes showing slightly different voltages and phases
Hello: The difference in CAL and phase is affected by probe, setup and scope CAL. Was the 2465B CALed recentely (or ever?) Did you check the scope with NO probes, for CAL on each channel and ecery
By Jean-Paul · #175625 ·
Re: PG506 calibrator generator voltage error
Hello: Your issues will have better answers if you can supply more info: Scope photos of the noise and conditions or setupo? Photos or sketch of ENTRIE system, PG506, TM500, scope, etc? Your location
By Jean-Paul · #175624 ·