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Zenith H725
#38

Lunchtime today brings me to about 1/4 through the paper cap replacements, starting at the RF end. Everything seems to be in hard to access locations, and the old solder is not terribly cooperative, but we're getting there.

I also sorted out the tuning mechanism. Everything had become extremely stiff, and even after cleaning and lubrication it was impossible to get a good drive from the cord. The tuning cap itself was very stiff - I read about a similar problem on one of these sets. With no bearing adjustment, the only recourse was to "ease" the frame ends apart very gently, so I tried the same. This did the trick - although I disliked taking such drastic action. It now works properly through the range, and has what I would describe as the right feel. The cord for the dial pointer has also been replaced.

Hoping to get the caps done today, and give the set another test on dim-bulb power.

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
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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
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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
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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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