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Zenith 7H920 AM/FM set 7 tube
#50

ok,, i went ahead and after about an hour of running it hard, i brought it back in the house thinking all was well but its not.

so apparently after some amount of time, this thing starts to do this......
the crackle and poping is common to both AM and FM bands,,

click on the link and play the vid.
crackle and poping
this is gonna be a hard one to troubleshoot unless someone knows a trick.
i am going to have to find a way to get the volume down while its failing in order to work on it otherwise its going to drive me crazy listening to all that crap.
the only way to figure this out is to troubleshoot during it failing i guess,,, right?
or....... let it finish cooking off whatever it wants to break so that the speaker hopefully then goes quiet??

https://www.dropbox.com/s/20nwkjef2d3cbp...1.mp4?dl=0

the selenium rectifier has good ac in and good DC out,, and i dont have any odd smells.... but it could be the fault as well and its just not done cooking itself to death yet.


Messages In This Thread
Zenith 7H920 AM/FM set 7 tube - by jcassity - 11-30-2018, 03:04 PM
RE: Zenith 7H020 AM/FM set 7 tube - by jcassity - 11-30-2018, 03:11 PM
RE: Zenith 7H020 AM/FM set 7 tube - by jcassity - 11-30-2018, 03:12 PM
RE: Zenith 7H920 AM/FM set 7 tube - by David - 11-30-2018, 07:41 PM
RE: Zenith 7H920 AM/FM set 7 tube - by David - 11-30-2018, 07:51 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-01-2018, 01:01 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-01-2018, 08:55 PM
RE: Zenith 7H920 AM/FM set 7 tube - by David - 12-01-2018, 09:22 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-02-2018, 10:32 AM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-02-2018, 11:58 AM
RE: Zenith 7H920 AM/FM set 7 tube - by David - 12-02-2018, 12:31 PM
RE: Zenith 7H920 AM/FM set 7 tube - by KCMike - 12-02-2018, 01:17 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-02-2018, 01:45 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-02-2018, 02:46 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-02-2018, 04:45 PM
RE: Zenith 7H920 AM/FM set 7 tube - by David - 12-02-2018, 08:24 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-02-2018, 09:00 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-02-2018, 09:02 PM
RE: Zenith 7H920 AM/FM set 7 tube - by David - 12-02-2018, 10:10 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-03-2018, 11:33 AM
RE: Zenith 7H920 AM/FM set 7 tube - by David - 12-03-2018, 08:26 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-03-2018, 10:10 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-04-2018, 09:08 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-04-2018, 09:33 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-04-2018, 10:18 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-05-2018, 10:27 AM
RE: Zenith 7H920 AM/FM set 7 tube - by EdHolland - 12-05-2018, 02:30 PM
RE: Zenith 7H920 AM/FM set 7 tube - by David - 12-05-2018, 05:22 PM
RE: Zenith 7H920 AM/FM set 7 tube - by David - 12-05-2018, 08:41 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-05-2018, 10:53 PM
RE: Zenith 7H920 AM/FM set 7 tube - by Arran - 12-07-2018, 03:08 AM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-07-2018, 09:29 AM
RE: Zenith 7H920 AM/FM set 7 tube - by David - 12-07-2018, 02:04 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-07-2018, 10:06 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-08-2018, 09:27 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-09-2018, 11:59 AM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-09-2018, 12:02 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-14-2018, 10:27 AM
RE: Zenith 7H920 AM/FM set 7 tube - by EdHolland - 12-14-2018, 02:41 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-14-2018, 04:27 PM
RE: Zenith 7H920 AM/FM set 7 tube - by LarryFS - 12-14-2018, 05:51 PM
RE: Zenith 7H920 AM/FM set 7 tube - by TV MAN - 12-15-2018, 11:48 AM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-15-2018, 02:16 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-17-2018, 08:13 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-18-2018, 08:25 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-18-2018, 10:01 PM
RE: Zenith 7H920 AM/FM set 7 tube - by David - 12-18-2018, 10:41 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-19-2018, 10:15 AM
RE: Zenith 7H920 AM/FM set 7 tube - by Ed Locker - 12-19-2018, 10:54 AM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-19-2018, 12:10 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-19-2018, 12:11 PM
RE: Zenith 7H920 AM/FM set 7 tube - by Ed Locker - 12-19-2018, 03:19 PM
RE: Zenith 7H920 AM/FM set 7 tube - by jcassity - 12-19-2018, 08:13 PM



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