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Zenith 7H920 AM/FM set 7 tube
#18

all caps replaced and finally i moved on to demo of the filter cap can.

i removed the dual section 80/40 that was installed by the previous repair and measured it.
the aftermarket dual section cap measured as follows:
the 80uf was reading 3uf
the 40uf was initially reading about 10 then to 11 then 13.2, 14.2.... it was charging up but no where near 40

so not only was the original filter caps diagnosed in the past as bad but this aftermarket one is to.

hopefully this ends up being the source of the gargle noise i hear.

your wondering why i did not do the filter caps already... well as the previous post i did a video you can watch,, there was no audible indication that i could hear that is telling me that filter caps were bad... no steady hum or anything.

my plan is to do filter caps as follows....
the 80uf = use 2) 160uf 160v caps in series ,,, OR,,, a single 67uf 160v ---- thoughts?
the 40uf= use 2) 47uf 160v
the last 40uf= use a smaller 47uf 50v or 25v i have on hand.


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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