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Yes Gary, I ruined a pot years ago from carelessness. I am very very cautious now. You want to drill the outer cover but not let the drill enter into the pot itself at all.

The cleaner will evaporate.? Its job is complete, which is to remove the dirt or dissolve the oxides.? The residue remains to fester and cause problems again, but for the most part is well out of

This has been a very interesting thread on how to clean potentiometers, but there has been no mention of what happens after you get the cleaner/lubrication into the potentiometer. Do you leave the

Be careful where you drill that hole. It is easy to scratch and break the resistive element. It is best to find an old discardable identical potentiometer that you can open up to see where the

You're welcome. Glad to be of help. The probe is nice, good for full bandwidth on a 7A19 or 7A29. I prefer 7A29's because I think they're less prone to damage. The 7A24, which is good, has

To Jim & John: I just tried a 7B71/7B70 set in a 7904 (they were really meant for the 7704(A) but work fine in most any 7xxx mainframe). I've always found the trigger setting knob in these time bases

You can look at NTSC video (old analog video) with it. It is pretty much useless for anything else as it is a specialized instrument. It was the waveform monitor of choice back in the day when I was a

Ok, I can try that. I'll have to get another pulse generator than the calibrator to be steeper slope. Later today.

Thanks Harvey. I studied things a bit more and decided to give up. The FET probe is on Ebay as Parts/repair with missing probe socket. I tried to list it factually. I hate giving up but sometimes it

I've been following this thread with some interest because I have a 7B71 myself.? Planning to try it in 7904 when I get a chance.? With 7A26 and new-to-me 7A11's.? Maybe this weekend.? I will post

If you're doing anything with baseband video, such as CCTV cameras for surveillance systems, video tape recorders, etc., then you'll want this. It looks at very specific things on the video

You seem to say that it too sometimes displays the same behaviour, which is only natural, as may be deduced from what I wrote earlier. You are looking at a very slow ramp/edge, triggering a time base

The 1480 series are excellent video waveform monitors but not useful as general purpose scopes. Of limited use now, even as waveform monitors since they only do standard definition analogue video,

I have been given this tool. I have a Tek 2246A and a Hitachi scope already. What can I do with this that I can't with the other scopes? I have never done anything with video nor intend to. Also, the

Yes, of the four fastest speeds, 50ns/div is always jittery +/- 1/2 div. 20 ns is usually solid, with maybe 1/2 trace width jitter. 100ns/div and 200ns/div randomly can have excess jitter. These show

Yes, of the four fastest speeds, 50ns/div is always jittery +/- 1/2 div. 20 ns is usually solid, with maybe 1/2 trace width jitter. 100ns/div and 200ns/div randomly can have excess jitter. A 7B70

from Tim P (UK) WTB 311-1485-00 dual pot 100K + 2K anyone got one for sale ? (nothing on Qservice or Testequip) thanks Tim

It does indeed. No assembly error. You would have noticed or would notice soon if incorrectly mounted... Raymond

@Raymond Thanks for the reply and for sending the TDS600B software, much appreciated. @Zenith I have sent a PM to you offlist - thanks again for the reply.

I doubt that the B-model software will work on a C-model. Reply to me off list and I'll mail it to you. /H?kan