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Linear Mode
Model 89
Ron Ramirez
Silent Key
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Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand State, Province, Country: Indiana
#5

06-29-2019, 09:05 PM
Hold the phone, folks. (And welcome here vacuum, by the way.) Icon_smile

You say that you have to tap on the 75 tube to restore proper operation. The 75 tube is the second detector and 1st audio tube; it has nothing to do with the oscillator circuit.

A possible fix for your 75: unsolder the solder which is on top of its grid cap, then apply fresh solder. This sometimes fixes 75 tubes with intermittent issues as yours appears to have.
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Ron Ramirez
Ferdinand IN
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Messages In This Thread
Model 89 - by vacuum - 06-29-2019, 02:10 PM
RE: Model 89 - by klondike98 - 06-29-2019, 02:17 PM
RE: Model 89 - by David - 06-29-2019, 03:17 PM
RE: Model 89 - by Steve Davis - 06-29-2019, 08:52 PM
RE: Model 89 - by Ron Ramirez - 06-29-2019, 09:05 PM
RE: Model 89 - by Radioroslyn - 06-29-2019, 09:52 PM
RE: Model 89 - by Ed Locker - 06-30-2019, 09:08 AM
RE: Model 89 - by Steve Davis - 06-30-2019, 10:09 AM
RE: Model 89 - by vacuum - 07-01-2019, 12:37 AM
RE: Model 89 - by vacuum - 07-01-2019, 10:03 PM



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