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Re: Tektronix 535 scope for coiling use
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- Subject: Re: Tektronix 535 scope for coiling use
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Sun, 10 Apr 2005 18:25:32 -0600
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Original poster: Rich Simpson <richcreations@xxxxxxxxx>
On Apr 9, 2005, at 11:38 AM, Tesla list wrote:
Original poster: Ed Phillips <evp@xxxxxxxxxxx>
I picked up that old scope I asked the list about, when at his place
leaving, it had a good trace on both channels (it is a dual trace scope)
when I got home, it did not work, I traced the problem to a bad Pot,
I may have located a replacement in iowa...
I needed a scope, but I am starting to think I need to get a scope to
to help fix this one next time it breaks, and I should get a "parts
or two of this model (535A), so I will have parts.
So if anyone has some old tek scope parts, or a dead 535A that they do
want anymore, let me know what you would want for them...
Which pot is bad and why did it keep the scope from working? I can't
imagine anything in that scope which would not be easy to replace,
although some of the dual pots in the preamp might be a nuisance. For
that matter, what's wrong with the pot? If it's just intermittent or
noisy a squirt of contact lubricant plus a lot of turning back and forth
will probably restore it. I recently had to go through that procedure
with a CA preamp.
The bad pot was in my CA preamp, it is a little black plastic pot, (650ohm)
that went on the end of one of the rotary switches, it has some broken
windings so it is really dead.