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90 restoration
#65

Tonight I was doing the switcheroos.

First of, I noticed that the radio sounded unusually well tonight, nd sure enough there was very little of that hum coming through when tuned in the station. I noticed the him changes during the day with that station. They played "I'm a believer" and it sounded very nice. Nothing close to 37-116 but that was not ever expected.

Then when the program changed and they started playing something with a bit more distortion, I switched the detector tube with another 24. The sound became worse, at least subjectively, and became better again when the tube was replaced. I tried various tubes in teh detector socket and the one that was there sounded better than others. Strangely enough this is the tube with the lowest mutual conductance.
Then I placed the last tube thart was in the radio I did not try, the original Philco globe 24, and subjectively it sounded a bit softer and less raspy, so I left it there. Other tubes' swapping did not matter.

The second one was using the 90's speaker in the console 20.
The 20 also played unusually well tonight.
Although I stated before that the distortions are similar when I transferred the speaker in the 20 the distortion seemed to migrate with it to a good degree.

All this being highly subjective and a bit confused, I think the problem might be many-fold, including possible output transformer impedance mismatch, the detector being what it is, the mentioned before different depth of modulation, all of it combined.

Well, I realized I am yet to change the tuning cap grommets which are totally destroyed.....plan a trip to Lowes tomorrow.


Messages In This Thread
90 restoration - by morzh - 12-08-2013, 09:13 PM
RE: 90 restoration - by morzh - 12-09-2013, 11:36 PM
RE: 90 restoration - by morzh - 12-10-2013, 04:20 PM
RE: 90 restoration - by Ron Ramirez - 12-10-2013, 05:02 PM
RE: 90 restoration - by morzh - 12-10-2013, 06:16 PM
RE: 90 restoration - by Ron Ramirez - 12-10-2013, 06:31 PM
RE: 90 restoration - by morzh - 12-10-2013, 08:07 PM
RE: 90 restoration - by morzh - 12-13-2013, 11:54 AM
RE: 90 restoration - by Ron Ramirez - 12-13-2013, 06:22 PM
RE: 90 restoration - by morzh - 12-13-2013, 10:53 PM
RE: 90 restoration - by Ron Ramirez - 12-13-2013, 11:15 PM
RE: 90 restoration - by morzh - 12-13-2013, 11:15 PM
RE: 90 restoration - by Ron Ramirez - 12-14-2013, 09:29 AM
RE: 90 restoration - by Scott Fletcher - 12-15-2013, 05:24 PM
RE: 90 restoration - by morzh - 12-15-2013, 06:37 PM
RE: 90 restoration - by Scott Fletcher - 12-15-2013, 10:12 PM
RE: 90 restoration - by morzh - 12-16-2013, 12:12 PM
RE: 90 restoration - by morzh - 12-21-2013, 11:29 PM
RE: 90 restoration - by Arran - 12-22-2013, 01:58 AM
RE: 90 restoration - by morzh - 12-22-2013, 03:03 PM
RE: 90 restoration - by morzh - 12-22-2013, 11:16 PM
RE: 90 restoration - by morzh - 12-23-2013, 02:56 PM
RE: 90 restoration - by Scott Fletcher - 12-23-2013, 03:48 PM
RE: 90 restoration - by morzh - 12-23-2013, 04:35 PM
RE: 90 restoration - by morzh - 12-25-2013, 05:16 PM
RE: 90 restoration - by morzh - 12-26-2013, 05:55 PM
RE: 90 restoration - by morzh - 12-27-2013, 10:39 AM
RE: 90 restoration - by morzh - 12-27-2013, 10:41 AM
RE: 90 restoration - by jontz - 12-27-2013, 11:19 AM
RE: 90 restoration - by BrendaAnnD - 12-27-2013, 11:29 AM
RE: 90 restoration - by morzh - 12-27-2013, 12:41 PM
RE: 90 restoration - by morzh - 12-27-2013, 12:47 PM
RE: 90 restoration - by klondike98 - 12-27-2013, 01:28 PM
RE: 90 restoration - by morzh - 12-27-2013, 02:29 PM
RE: 90 restoration - by Eliot Ness - 12-27-2013, 03:28 PM
RE: 90 restoration - by morzh - 12-27-2013, 04:32 PM
RE: 90 restoration - by morzh - 12-27-2013, 04:42 PM
RE: 90 restoration - by morzh - 12-28-2013, 06:19 PM
RE: 90 restoration - by morzh - 12-28-2013, 07:39 PM
RE: 90 restoration - by morzh - 12-29-2013, 12:44 PM
RE: 90 restoration - by Mondial - 12-29-2013, 01:14 PM
RE: 90 restoration - by morzh - 12-29-2013, 02:17 PM
RE: 90 restoration - by klondike98 - 12-29-2013, 04:02 PM
RE: 90 restoration - by morzh - 12-29-2013, 04:02 PM
RE: 90 restoration - by Mondial - 12-29-2013, 05:04 PM
RE: 90 restoration - by morzh - 12-29-2013, 05:53 PM
RE: 90 restoration - by morzh - 12-29-2013, 06:22 PM
RE: 90 restoration - by morzh - 12-29-2013, 07:28 PM
RE: 90 restoration - by codefox1 - 12-29-2013, 07:49 PM
RE: 90 restoration - by morzh - 12-29-2013, 08:50 PM
RE: 90 restoration - by morzh - 01-01-2014, 07:18 PM
RE: 90 restoration - by BrendaAnnD - 01-01-2014, 07:43 PM
RE: 90 restoration - by morzh - 01-01-2014, 09:56 PM
RE: 90 restoration - by BrendaAnnD - 01-01-2014, 10:08 PM
RE: 90 restoration - by morzh - 01-01-2014, 10:40 PM
RE: 90 restoration - by morzh - 01-02-2014, 03:12 PM
RE: 90 restoration - by morzh - 01-03-2014, 05:28 PM
RE: 90 restoration - by morzh - 01-03-2014, 10:19 PM
RE: 90 restoration - by morzh - 01-04-2014, 01:49 PM
RE: 90 restoration - by Mondial - 01-04-2014, 01:57 PM
RE: 90 restoration - by morzh - 01-04-2014, 02:04 PM
RE: 90 restoration - by morzh - 01-04-2014, 07:02 PM
RE: 90 restoration - by BrendaAnnD - 01-04-2014, 11:03 PM
RE: 90 restoration - by morzh - 01-04-2014, 11:05 PM
RE: 90 restoration - by morzh - 01-05-2014, 08:08 PM
RE: 90 restoration - by morzh - 01-06-2014, 01:00 PM
RE: 90 restoration - by Scott Fletcher - 01-06-2014, 07:59 PM
RE: 90 restoration - by morzh - 01-06-2014, 09:09 PM
RE: 90 restoration - by morzh - 01-06-2014, 09:13 PM
RE: 90 restoration - by Scott Fletcher - 01-06-2014, 09:52 PM
RE: 90 restoration - by BrendaAnnD - 01-06-2014, 10:09 PM
RE: 90 restoration - by morzh - 01-06-2014, 10:36 PM
RE: 90 restoration - by BrendaAnnD - 01-06-2014, 10:44 PM
RE: 90 restoration - by morzh - 01-06-2014, 11:03 PM
RE: 90 restoration - by TA Forbes - 01-07-2014, 10:48 AM
RE: 90 restoration - by morzh - 01-07-2014, 08:10 PM
RE: 90 restoration - by morzh - 01-18-2014, 08:34 PM
RE: 90 restoration - by morzh - 01-20-2014, 10:30 PM
RE: 90 restoration - by Mondial - 01-20-2014, 11:24 PM
RE: 90 restoration - by morzh - 01-21-2014, 09:41 AM
RE: 90 restoration - by morzh - 01-21-2014, 06:12 PM
RE: 90 restoration - by Arran - 01-22-2014, 01:27 AM
RE: 90 restoration - by morzh - 01-22-2014, 06:10 PM
RE: 90 restoration - by Radioroslyn - 01-22-2014, 07:50 PM
RE: 90 restoration - by morzh - 01-22-2014, 08:59 PM
RE: 90 restoration - by morzh - 01-23-2014, 09:35 PM



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