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You may have missed the ripple specs, but for any power supply, especially when we're looking at your results, suggests that the ripple on the TM506 is excessive.? A bit of logic suggests that the

I had a quick look and may be some interesting stuff there for someone. However he just spent too much verbiage on berating Tektronix. People like that piss me off. I always wonder what they

In going through the vintageTEK Museum's TM500 power modules, the most common problem is filter capacitors, which produces excess ripple. The supplies should have less than a volt of ripple with a 1

Thank you. Done.

"baseline" is the bottom portion of the waveform. The service manual is right, but the confusion may have come from the labels on the A21 PCB: there are TWO trimpots labeled "OUTPUT LEVEL". One is in

Dang, you are right!!!! Thank you, I guess I didn't pay attention to the state of the button, and never used the locate function before! That was it! Works just fine after pushing the button in, it

Get an ESR meter and find and replace the bad caps before power applied. Regards -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

The HV oscillator is fed from the unregulated 15 supply so if you start out with low line voltage, the oscillator will be starved of its supply. Since it is a regulated supply and hence a constant

Whats the recommended method with SMPS then? remove connections to main switching caps and regenerate them?

I've spent a few fruitless hours looking for videos of people actually using Tek sampling scopes (e.g. a 7000-series with the 7S11/7T11 plugins) just to see what it's like to use them. Is the user

I have TM506 that I have had for some time. I have a PG506 that works but it shows terrible distortion on the top and bottom of the square wave when installed in any compartment the TM506. Just as a

Hello-- I just finished spending a couple of enjoyable hours reading through this web site... https://emperoroftestequipment.weebly.com/ ...In which the author describes experience acquired while

DaveH52 wrote: That's too bad (though the price was nothing to get excited about) but searching on "flexible coupler" turns up all kinds of apparently suitable modern alternatives, all also available

Jeff, Correct, the power supplies in the 455 / 465 / 475 and many others are linear, so they are OK to start on variac. You are 100% right about SMPS, like the 485 and other more modern scopes, should

QService has them listed but no stock.

https://www.ebay.com/itm/Tektronix-376-0050-00-flexible-coupler-for-0-087-0-127-diameter-shaft-TM500/153936604515?hash=item23d7562d63:g:08QAAOSwXnVewbB4 None available - all gone

Barry, I would tend to agree with you. The HV Multiplier in the 465/475 and 455/465M are just failure prone parts. I have had them die right in front of me after just a few minutes of operation. --

I can't see any sign of a set screw. Unless it is hidden under the mounting nut. Not going to be fun to get that connector out.

Try Tek Probes group. I was in Tek probes engineering for 7 years so started the group.

Still looking for vertical knob assembly. Mine dried out an fell apart.