Hello Chuck. I removed the IC U500. I cleaned with Deoxit D5 its terminals and its socket. Unfortunately it didn't. Problem persist. Then I removed the IC PAL, cleaned his contacts and the problem

Yes. Leandro Lindemann via Groups.Io wrote:

I have now ended the resuscitation from 40 years hibernation of my 547 scope. I could not be more pleased with it. It has now inside an added little centrifugal blower fan that cools the HV supply.

I understood your explanations Chuck. I will do this today, and I will return with the result. With much hope of being something simple, like bad contact. In this case, the hybrid is the U500,

I understood your explanations Chuck. I will do this today, and I will return with the result. With much hope of being something simple, like bad contact. In this case, the hybrid is the U500,

Walter, Please advise me of when the "stuff day" is to take place and when you post listings of what stuff is up for sale. I can't make the trip, but I will consider bidding online. Regards, Steve

It doesn't take much care to work with the "finned" hybrids. They each have 4, #4-40 nuts, with captive star lock washers, that hold them to the socket. Some of the hybrids use a hex standoff as one

The next stuff day event is tentatively set for saturday May 2nd. this time seems clear for most people, but let me know if there's a problem. This year we will also have "remote" stuff day, where

Thanks for the link.

Hello Chuck. First of all, thank you very much for helping me. Thank you also for informing that you were using the cursors in the wrong way. I learned that now. Regarding hybrid ICs, I never

You are looking at the military service manual... it is not the best manual to have. The US military standardized on the Fluke calibrators. You can calibrate your scope with the usual SG503/504,

565 is what your are thinking of.. -Chuck Harris Roy Morgan wrote:

First thing you need to know is that the cursor measurements are calibrated to be in the center of the noise on the trace, not on the peak of the noise on the trace, so all of the 1.06V, or

Some decades ago (2 or 3) I had a different dual trace scope but am unsure of the model number. It was the size of the 545 with no separate power unit. It had two vertical channels and time base

I've never seen a 555 up close and personal but I have a 556 that I bought for 25 bucks with the full manual at a HAM/Antique radio fest. From what I know it's very similar to the 555 but has it's own

The service manual states that a Fluke 5820A calibrator is required to calibrate the 2467. This instrument is inaccessible here in Brazil. I believe that there must be other instruments capable of

Testing tubes, CRTs, flyback perf.?

from Tim P (UK) re the 555, I've often wondered why the timebases were made plug-in. Was it just for servicing, or was someone at Tek thinking about specialised units (TDR, sampling, etc)? According

Just to chime in. I got a 555 some years back with 2 CA, and a D. I have since added a W, and 1A7. I’ll not mention the initial price, as it was phenomenal. The crt has the purple/blue phosphor for

Yes, the spacings look like you're ready for 40kV!