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



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