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The 1502 uses a tunnel diode, and the waveform looks like a step.? You look down the road to see what happens.? However, the 1502 has a range that is 1/10 that of the 1503, and thus increased

Hi Ke-Fong Lin : I recommend you put this observation in your github page or (preferable) update your KiCAD files. I got the boards made in June and had to get a fresh set made with the correct

Martin, I forgot to say that if your scope and any other Tek. items have any 151-0367-00 transistors, check them. These are likely leaky from C to E as a diode. Any of these that have round leads will

I wholly agree with Tom Gardner’s comments. Playing with the BNC connector may be converting the 1502 into a parts unit. Besides, the 1502 was designed for a specific purpose and Tek engineers

If you don't already know of this effort - you may enjoy reading this and from there connect with people who surely would appreciate that equipment and have motivation and qualification to do

Martin, The high brightness is likely bad d-c restorer diodes being leaky. Replace them with 1N4937. Also replace the 22meg 1/4W carbon resistor near that circuit with a Vishay VR37. This is a 1/2W 1%

Seems as though some young person could go out to gather up estate equipment for free and put it into a warehouse to be sold at a fair price to needy technical people. Nothing should end up in

Good advice all. Thanks. The sad thing is I collected a lot of this stuff to save it from the fates you have described. But now after I am gone to who knows if it could meet the same fate. I remember

Ken mentioned mentoring someone younger. For me, not mentoring so much as providing equipment to work on. Over the years, I accumulated quite a few Tek scopes. Not nearly as many as some of you and

From dust we came, to dust we return. I look at all the engineering marvels that we marvel at, the Pyramids are one. The recording of any of the labourers is zero. In one hundred years, for most of us

Neat.? I didn't know that they did that (and don't remember words to that effect that they did....) That being said, I had one that I bought that had the TD assembly removed completely. Wonder what

I should mention that I do not consider myself a collector.? I do not have (some exaggeration here) spotlights pointing at pristine equipment sitting on a turntable behind glass.? I have the

I had a great aunt, who was widowed, and only had one son, who died young.? Years ago when she died, the family was going through her stuff, and there where tons of photos, documents and the

"My question then is this. What should those of us with large collections of Tek and other electronic equipment do while we are standing? I have over 50 scopes, a large collection of rare cameras, and

Thanks for the valuable information, Tom. It tells us that replacing the bnc with an sma would not necessarily be a welcome improvement. Cheers Tom Sent from my iThing, so please forgive brevity and

I am part of the majority here that is aging out and pondering what to do with one's "stuff".... Part of the angst is when to let go. Too young and you spend time wondering what to do, leave it too

The 1502's BNC is, or should be, "magic". As Harvey White noted, the TD can be killed by static in a cable. Tek's solution was to have a shorting bar in the BNC socket. Before the cable is fully

You have little control over things once you're out of the picture. Things very much depend on the reason you have this equipment. Collector of rarities? Perhaps give to museum or other such

Be very very careful with the 1502. The tunnel diode (almost completely unavailable) is pretty much connected across the input.? The average cable can hold enough of a static charge to kill that

My question then is this. What should those of us with large collections of Tek and other electronic equipment do while we are standing? I have over 50 scopes, a large collection of rare cameras, and