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37-116 Restoration
#29

All tubes checked, installed, and slowly powered up.  Stations all across the dial, though low volume and distorted.  At least I had something to work with.  I discovered the wiper contact on the treble control had a low resistance short to ground.  This caused the bias on the audio driver tube to vary from -14v to ov as I turned the selectivity control.  Fixed that and the radio works great... almost.  One dead band (1.5-7.6 mHz band).  The oscillator dies and there is total silence.  Before I reassembled the tuner chassis I had checked all coils and all measured ok.  I hope I don't have to remove and disassemble the tuner chassis again to find the problem!  It's a pain and it would be difficult to test without reassembly.  Otherwise, it tuned up great and performs admirably.  It's nice to have a signal first shot out of the box.  It gives you something to easily troubleshoot.  I think this will perform as good or better than my Scott 16.  The magnetic tuning is interesting and works quite well.  Once it locks into a station, you have to tune quite far off to get it to lock into the next station.

   


Messages In This Thread
37-116 Restoration - by rfeenstra - 01-19-2019, 02:03 PM
RE: 37-116 Restoration - by rfeenstra - 01-19-2019, 02:14 PM
RE: 37-116 Restoration - by Nathan Slingerland - 01-19-2019, 07:58 PM
RE: 37-116 Restoration - by rfeenstra - 01-19-2019, 08:48 PM
RE: 37-116 Restoration - by Nathan Slingerland - 01-19-2019, 10:28 PM
RE: 37-116 Restoration - by rfeenstra - 01-19-2019, 10:42 PM
RE: 37-116 Restoration - by Radioroslyn - 01-19-2019, 10:46 PM
RE: 37-116 Restoration - by Nathan Slingerland - 01-19-2019, 11:33 PM
RE: 37-116 Restoration - by rfeenstra - 01-19-2019, 11:49 PM
RE: 37-116 Restoration - by rfeenstra - 01-20-2019, 04:36 PM
RE: 37-116 Restoration - by rfeenstra - 01-20-2019, 05:28 PM
RE: 37-116 Restoration - by amptramp - 01-21-2019, 11:52 PM
RE: 37-116 Restoration - by rfeenstra - 01-22-2019, 12:18 AM
RE: 37-116 Restoration - by rfeenstra - 01-26-2019, 11:24 PM
RE: 37-116 Restoration - by Arran - 01-27-2019, 03:04 AM
RE: 37-116 Restoration - by tbone - 01-27-2019, 07:00 AM
RE: 37-116 Restoration - by rfeenstra - 01-27-2019, 09:46 AM
RE: 37-116 Restoration - by rfeenstra - 02-06-2019, 11:10 PM
RE: 37-116 Restoration - by rfeenstra - 02-06-2019, 11:19 PM
RE: 37-116 Restoration - by Ron Ramirez - 02-07-2019, 07:17 AM
RE: 37-116 Restoration - by Ron Ramirez - 02-07-2019, 07:20 AM
RE: 37-116 Restoration - by morzh - 02-07-2019, 07:49 AM
RE: 37-116 Restoration - by jcassity - 02-07-2019, 09:50 AM
RE: 37-116 Restoration - by jcassity - 02-07-2019, 10:12 AM
RE: 37-116 Restoration - by morzh - 02-07-2019, 10:56 AM
RE: 37-116 Restoration - by rfeenstra - 02-07-2019, 05:46 PM
RE: 37-116 Restoration - by rfeenstra - 02-07-2019, 05:53 PM
RE: 37-116 Restoration - by morzh - 02-07-2019, 06:42 PM
RE: 37-116 Restoration - by rfeenstra - 02-10-2019, 10:44 PM
RE: 37-116 Restoration - by Nathan Slingerland - 02-11-2019, 12:28 AM
RE: 37-116 Restoration - by 462ron - 02-11-2019, 08:33 AM
RE: 37-116 Restoration - by rfeenstra - 02-11-2019, 08:56 AM
RE: 37-116 Restoration - by Nathan Slingerland - 02-11-2019, 10:53 AM
RE: 37-116 Restoration - by Ron Ramirez - 02-11-2019, 10:56 AM
RE: 37-116 Restoration - by rfeenstra - 02-11-2019, 11:40 AM
RE: 37-116 Restoration - by Ron Ramirez - 02-11-2019, 11:43 AM
RE: 37-116 Restoration - by Phlogiston - 02-11-2019, 11:50 AM
RE: 37-116 Restoration - by rfeenstra - 02-11-2019, 01:01 PM
RE: 37-116 Restoration - by Kenradio - 02-11-2019, 02:52 PM
RE: 37-116 Restoration - by 462ron - 02-11-2019, 02:53 PM
RE: 37-116 Restoration - by rfeenstra - 02-11-2019, 11:36 PM
RE: 37-116 Restoration - by Ron Ramirez - 02-12-2019, 07:21 AM
RE: 37-116 Restoration - by rfeenstra - 02-12-2019, 10:56 AM
RE: 37-116 Restoration - by Phlogiston - 02-12-2019, 12:10 PM
RE: 37-116 Restoration - by Nathan Slingerland - 02-12-2019, 12:37 PM
RE: 37-116 Restoration - by rfeenstra - 02-12-2019, 12:55 PM
RE: 37-116 Restoration - by Phlogiston - 02-12-2019, 01:37 PM
RE: 37-116 Restoration - by rfeenstra - 02-12-2019, 02:53 PM
RE: 37-116 Restoration - by Ron Ramirez - 02-12-2019, 02:58 PM
RE: 37-116 Restoration - by Kenradio - 02-12-2019, 03:26 PM
RE: 37-116 Restoration - by rfeenstra - 02-12-2019, 03:38 PM
RE: 37-116 Restoration - by mikethedruid - 02-12-2019, 04:34 PM
RE: 37-116 Restoration - by rfeenstra - 02-13-2019, 11:01 AM
RE: 37-116 Restoration - by Phlogiston - 02-13-2019, 11:30 AM
RE: 37-116 Restoration - by radio63 - 02-14-2019, 03:31 PM
RE: 37-116 Restoration - by rfeenstra - 02-14-2019, 04:44 PM
RE: 37-116 Restoration - by Ron Ramirez - 02-14-2019, 06:41 PM
RE: 37-116 Restoration - by rfeenstra - 02-14-2019, 06:51 PM
RE: 37-116 Restoration - by Ron Ramirez - 02-14-2019, 06:54 PM
RE: 37-116 Restoration - by Phlogiston - 02-14-2019, 07:03 PM
RE: 37-116 Restoration - by Ron Ramirez - 02-14-2019, 07:14 PM
RE: 37-116 Restoration - by morzh - 02-14-2019, 08:13 PM
RE: 37-116 Restoration - by Phlogiston - 02-14-2019, 08:16 PM
RE: 37-116 Restoration - by morzh - 02-14-2019, 08:19 PM
RE: 37-116 Restoration - by rfeenstra - 02-14-2019, 08:36 PM
RE: 37-116 Restoration - by rfeenstra - 02-15-2019, 10:46 AM
RE: 37-116 Restoration - by Phlogiston - 02-15-2019, 11:04 AM
RE: 37-116 Restoration - by Ron Ramirez - 02-15-2019, 12:11 PM
RE: 37-116 Restoration - by morzh - 02-15-2019, 12:11 PM
RE: 37-116 Restoration - by rfeenstra - 02-15-2019, 07:38 PM
RE: 37-116 Restoration - by Phlogiston - 02-15-2019, 08:53 PM
RE: 37-116 Restoration - by morzh - 02-15-2019, 09:18 PM
RE: 37-116 Restoration - by rfeenstra - 02-15-2019, 11:06 PM
RE: 37-116 Restoration - by rfeenstra - 03-24-2019, 10:51 PM



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