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Vintage Tape (Audio), Cassette, Wire and Magnetic Disc Recorders and Players Open-reel tape recorders, cassette recorders, 8-track players etc. |
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Thread Tools |
23rd Mar 2020, 7:45 am | #81 |
Triode
Join Date: May 2019
Location: Oslo, Norway
Posts: 44
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Re: Diagnosing temperature related noise?
Unfortunately did not work.
The first day of testing I was able to play about three complete tapes (both side) without a single glitch, then I went to bed, and the next morning it started glitching again after about 15 minutes, and 5 minutes after the channel was completely gone. The next day the audio was back, and then quickly vanished again. With a thermal imaging device a colleague had, I checked the hot points, appart from the two Dolby chips (that go up to 51 celcius) and a component near the power supply section, everything is in the same temperature range. I tried to use a freeze can, temperature dropped all over, but the sound did not come back. What I noticed before the sound degraded, was that the "fish" smell was back, so could it simply be chemical related instead of thermal: When not using the device for a while, it can play music for a while, but after that, as long as I use it, it only work for a short period of time. Could it simply be something chemical that "restabilized" when not in use but then fail quickly when it's been used recently? |
23rd Mar 2020, 10:51 pm | #82 |
Dekatron
Join Date: Apr 2019
Location: Worthing, West Sussex, UK.
Posts: 6,587
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Re: Diagnosing temperature related noise?
Well that is really bad news ! I thought and hoped that you had managed to crack it.
Well chemical could be a capacitor, particularly an electrolytic, I know you have visually checked them for any obvious untoward signs. |