Posts: 871
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Joined: Feb 2013
City: Shenandoah,
State, Province, Country: Pennsylvania
Here is my Zenith 7H920, similar to your H725. It is a great sounding set with more volume than I would expect from a SE output design. I tried doing a sweep alignment of the FM section but could never get the marker blip (10.7Mhz) to show up to set the discriminator properly. You can see the results in my post about Eico 368 Sweep generator in the “Test Equipment” section of the phorum. I was able to get aligned on the money using the crystal marker only and it sounds great. When you get to aligning yours it should be doable with a non-sweep generator. Looking forward to your progress!
Ron
Bendix 0626. RCA 8BX5. RCA T64
Philco 41-250. Philco49-500
GE 201. Philco 39-25
Motorola 61X13. Philco 46-42 Crosley 52TQ
Philco 37-116. Philco 70
AK 35 Philco 46-350
Philco 620B. Zenith Transoceanic B-600
Philco 60B. Majestic 50
Philco 52-944. AK 84
Messages In This Thread
462ron - by 462ron - 03-23-2025, 08:54 AM
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Recent Posts
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Philco 42-345 Restoration/Repair
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Philco 42-345 Restoration/Repair
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| Looks like if I am reading it correctly it looks like the silver capacitor#57 that appears to be a replacement is of a l...osanders0311 — 05:09 PM |
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Philco model 38 code 121 not receiving signal.
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| Thanks Arran. Yeah this plastic is pretty thin. It's a little thinner than the original stuff. It kinda reminds me of p...Stormlord5500 — 04:37 PM |
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Testing a speaker and output transformer Trutone A2-G
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| The equivalent of one short turn is basically the same as that of a shorted load.
If it is the primary's turn, then the ...morzh — 03:53 PM |
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Testing a speaker and output transformer Trutone A2-G
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| I've never had an output transformer become shorted, the failure mode is usually an open primary, or in a center tapped ...Arran — 03:52 PM |
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Philco model 38 code 121 not receiving signal.
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| As long as the plastic sheeting isn't too thick, I think that the thickness of photographic film would be just about rig...Arran — 03:19 PM |
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Philco model 38 code 121 not receiving signal.
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| Well why not! :lol:Stormlord5500 — 03:14 PM |
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Philco model 38 code 121 not receiving signal.
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| Good luck next thing you know you will be winding coils just for the fun of it. DavidDavid — 11:29 AM |
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Testing a speaker and output transformer Trutone A2-G
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| morzh
Short-circuited turns can be considered as a half-dead transformer.
But on this case transformer will hot and s...Vlad95 — 11:01 AM |
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Testing a speaker and output transformer Trutone A2-G
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| I am not sure how a transformer could be weak. It could be inadequate, but only when you replace the original with somet...morzh — 09:56 AM |
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