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Zenith H725
#39

Cap replacement is completed. (Excepting PSU filters for now). A cautious power up got the expected behaviour of the dim bulb, but atrocious FM reception and nothing at all on AM. I looked around the areas I had worked, and eventually found some components disturbed near the last IF can for AM.... I'd pushed them causing leads of these components to short out the IF transformer Fortunately no lasting damage done, and rearranging the cap and resistor positions brought everything back to life.

I don't hold with furniture that talks.


Messages In This Thread
Zenith H725 - by EdHolland - 03-17-2025, 09:45 PM
RE: Zenith H725 - by MrFixr55 - 03-17-2025, 10:24 PM
RE: Zenith H725 - by EdHolland - 03-18-2025, 11:52 AM
RE: Zenith H725 - by David - 03-18-2025, 01:48 PM
RE: Zenith H725 - by EdHolland - 03-18-2025, 06:09 PM
RE: Zenith H725 - by Arran - 03-18-2025, 10:08 PM
RE: Zenith H725 - by RodB - 03-19-2025, 10:04 AM
RE: Zenith H725 - by EdHolland - 03-19-2025, 10:46 AM
RE: Zenith H725 - by morzh - 03-19-2025, 12:38 PM
RE: Zenith H725 - by RodB - 03-19-2025, 12:55 PM
RE: Zenith H725 - by morzh - 03-19-2025, 01:25 PM
RE: Zenith H725 - by David - 03-19-2025, 03:49 PM
RE: Zenith H725 - by Arran - 03-19-2025, 04:45 PM
RE: Zenith H725 - by Paul Philco322 - 03-19-2025, 08:13 PM
RE: Zenith H725 - by EdHolland - 03-20-2025, 12:34 PM
RE: Zenith H725 - by MrFixr55 - 03-20-2025, 12:59 PM
RE: Zenith H725 - by EdHolland - 03-20-2025, 08:40 PM
RE: Zenith H725 - by MrFixr55 - 03-21-2025, 08:59 AM
RE: Zenith H725 - by radiorich - 03-21-2025, 09:29 AM
RE: Zenith H725 - by EdHolland - 03-21-2025, 09:41 PM
RE: Zenith H725 - by MrFixr55 - 03-21-2025, 09:53 PM
RE: Zenith H725 - by EdHolland - 03-22-2025, 03:17 PM
RE: Zenith H725 - by EdHolland - 03-22-2025, 06:09 PM
RE: Zenith H725 - by RodB - 03-22-2025, 06:52 PM
RE: Zenith H725 - by Arran - 03-22-2025, 07:05 PM
RE: Zenith H725 - by MrFixr55 - 03-22-2025, 08:34 PM
RE: Zenith H725 - by EdHolland - 03-22-2025, 08:40 PM
RE: Zenith H725 - by radiorich - 03-22-2025, 10:22 PM
RE: Zenith H725 - by radiorich - 03-22-2025, 10:35 PM
RE: Zenith H725 - by MrFixr55 - 03-22-2025, 10:39 PM
RE: Zenith H725 - by radiorich - 03-23-2025, 12:17 AM
462ron - by 462ron - 03-23-2025, 08:54 AM
RE: Zenith H725 - by Paul Philco322 - 03-23-2025, 09:18 AM
RE: Zenith H725 - by EdHolland - 03-23-2025, 10:37 AM
RE: Zenith H725 - by radiorich - 03-23-2025, 11:31 AM
462ron - by 462ron - 03-24-2025, 08:22 AM
RE: Zenith H725 - by radiorich - 03-24-2025, 08:34 AM
RE: Zenith H725 - by EdHolland - 03-24-2025, 02:44 PM
RE: Zenith H725 - by EdHolland - 03-24-2025, 06:56 PM
RE: Zenith H725 - by radiorich - 03-24-2025, 10:33 PM
RE: Zenith H725 - by EdHolland - 03-24-2025, 10:46 PM
RE: Zenith H725 - by Arran - 03-24-2025, 11:42 PM
RE: Zenith H725 - by EdHolland - Yesterday, 11:49 AM
RE: Zenith H725 - by Arran - Yesterday, 06:40 PM
RE: Zenith H725 - by EdHolland - Yesterday, 06:42 PM
RE: Zenith H725 - by EdHolland - 11 hours ago
RE: Zenith H725 - by radiorich - 7 hours ago



Users browsing this thread: 6 Guest(s)
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Recent Posts
Zenith H725
Hello Ed, yes , I have had noise disc capacitors and resistors plus even Mica capacitors . I was restoring a RCA and a...radiorich — 01:02 AM
Zenith H725
I managed a bit more detective work on the radio today. Sometimes, it's helpful to have too many radios, and this was on...EdHolland — 09:13 PM
Need to purchase some accessories for restoration of my Old Philco Radio
Hi Paulo, I do not know whether another supplier exists for the chassis support grommets, but you could try to go to ...morzh — 07:53 PM
Need to purchase some accessories for restoration of my Old Philco Radio
Dear Colleagues, I live in Brazil, South America and  I am quite involved in the restoration of my old Philco Radio Mode...palonso — 07:31 PM
Zenith H725
"Maybe its a later production run" -Yes I think so, internal stamp on one area proclaims June 1954, and ear...EdHolland — 06:42 PM
Zenith H725
Ed; If you find that there is a problem with the mica caps in the IF cans, if you have some way of measuring the capac...Arran — 06:40 PM
Zenith H725
Arran - thanks, I'll chase those easier things first. The sockets and pins were dirty, and there was a bit of crackling ...EdHolland — 11:49 AM
38-690 Gill Cloth
The 37 and 38-690 use the Philco ribbed cloth; Michael Katz sells a nice reproduction of it.Brad Winder — 09:06 AM
philco 91 detector transformer
thank youmg34.42 — 12:15 AM
Zenith H725
Ed; Before getting into the IF cans I try to make sure that the tube sockets, and tube pins are clean, those 7 and 9 p...Arran — 11:42 PM

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