HI Yang, WOW What a great idea! Congratulations on coming up with a wonderful project that will let everyone take advantage of some great Tek plugins. At least at first, to prove your concept is

I'm interested... what series scopes are they for? glad you got to him before he committed sacrilege

I'd like one also though don't need and am wondering how much he's asking since would be more a rescue in my situation.

I, too, would be potentially be interested in 7k series extenders.

Hi Ernesto, I know this phenomena but in the 7704A on my workbench it's hardly or not noticeably. There is no reason to suspect the HV. In the 7704A the HV transformer primary is fed with a square

I am willing to buy one for more than the scrap value of any gold on it. Ernesto

My 7704A scope is working correctly. But all along I have noticed an intensity modulation riding on the trace. First I assumed that it could be the random readout happening during the sweeps, but I

Hi Yang and Ed, Yang, I'm definitely interested. My "target" plug-ins would 7A22 differential amplifier and 7L5 spectrum analyzer. About the 7L5, it is 2 "slots" and would require support for

What are you going to do about the plug-in edge connector? Have you found a standard type that will work? Ed

Many 577 curve tracers have broken left-right switches on the 177 test fixture. The vintageTEK Museum has located a supply of replacement mechanisms. It is possible to unscrew the contact assemblies

I would be. Looks like a pretty neat design, too. What would you make available?

Paul, Thanks! The culprit is C581 which is a dead short. This raises the question of whether to make the repair and see if it's usable or do a complete refurb and cal. I don't have space or time

If they are 7xxx they are a gold mine. -- Michael Lynch Dardanelle, AR

I am working on a project that generating all the necessary power for a 7000 plugins, so that you can use some 7000 plugins on modern digital oscilloscope.

Hey Chuck. I might have to try that next time. I am just finishing up the recap if this ever needs to be done again should be much easier next time. The one that crapped out on me was C759 at the

Eric, You don't have to remove the CRT to replace/rebuild the PS caps. You need to remove the carry handle assembly, the 2 power supply boards and the CRT wires. You can then reach down and remove

I am currently working on a 576 and I have a 577 "in the wings waiting on some parts. I have not looked at the cal section for the 577. The 576 will be getting a full cal after a complete recap of the

That's on Schematic 6 -- Paul Amaranth, GCIH | Manchester MI, USA Aurora Group of Michigan, LLC | Security, Systems & Software paul@... |

It's a D1. I figured out the 177 after I started reading the service manual. I found the smoke source, CR582 on the A2 collector supply board, 200 V 1.5 A bridge rectifier, but can't find it on the

It doesn't look like they used RIFA caps, pity that'd be a good culprit for magic smoke when turned on. Probably a shorted cap somewhere. I have a pdf of full sheet schematics that I picked up