Sad story, indeed. Let's throw in a happy story, though. I often think back to acquiring my 475 from my late father back in 2015. It was there, in his workshop, in non-working condition. It probably bugged him every day that it didn't work, as he became physically unable to repair it. I really didn't have a use for it and, if anyone recalls, I hardly knew what it was for. I almost tossed it out but something told me not to. I kept it around for a while and almost tossed it out again, but didn't.
Then, one day my computer monitor quit working. I jumped onto YouTube and found a video that described common caps that fail in my particular monitor. I realized I could do that so I swapped them out and I'll be darned if it didn't fix my Dell monitor! I then looked over in the corner at that old 475 sitting there begging for some attention and that's when I found this Group.
You guys helped me get it fixed up and I still enjoy it to this day. It's in excellent condition and I love it! I have little use for it but bought that clock board and turn it on now and then to let it run and watch the clock. Over the last few years I've educated myself about scopes and now even have a Snap-on Vantage Pro (2 ch DSO) that I use for diagnosing cars.
You can't save them all but with the help of those here, especially Raymond in my case, many are saved.
Thanks to all!
John in Charlotte
From: TekScopes@groups.io <TekScopes@groups.io> on behalf of Raymond Domp Frank <hewpatek@...>
Sent: Saturday, August 31, 2019 6:01 PM
To: TekScopes@groups.io <TekScopes@groups.io>
Subject: [TekScopes] Defective 465: into the dumpster it goes!
What follows is a longish and sad story.
A few days ago, I was contacted by someone who said he was looking for a good quality analog 'scope.
Without asking many questions, I showed him one of my 465's and he liked it. He expressed some concern as to the reliability of these very old instruments (I think this sample was from 1976/77). I told him that these old 'scopes were still "more usable than unreliable", that some parts did tend to fail from old age, especially the dipped tantalum caps but that diagnosis and repair was straightforward, that I would take care of repair for some time in the future for free and that I had an ample spare components supply of all sorts should they be needed.
He was going to use the 'scope mainly for adjusting radio receivers and was looking forward to the high vertical sensitivity, especially when using a 1:1 probe. This should have been a warning for me but I limited myself to explaining why the use of passive 1:1 probes cannot be recommended for some of his intended use (450 kHz and 10.7 MHz IF) and giving him an example of the math.
We agreed on a price and he left, happy with his newly acquired classic, or so I thought.
After a few days, he contacted me, asking for two knobs (A and B trigger level), since apparently parts had broken off. I told him that I'd send replacements for free.
Before I could send them, he contacted me, saying that the replacement knobs were no longer needed since the 'scope had broken down: no beam, no graticule illumination, no fan sound, and that he had concluded that his 'scope obviously was a total loss. He was sorry to tell me the bad news but he had very much appreciated my explanations and service and he definitely wouldn't want any money back. When I offered to repair the 'scope for free, he added that that wouldn't be possible, since it was now in an underground dumpster, inaccessible to him. He once again blamed himself for making the mistake of buying such an old piece of equipment and we "parted as friends".
I still feel for the poor lonely instrument enveloped in darkness...