Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x


Beginning a 37-620 Restoration

Richard,

Thanks for confirming.  I haven't adjusted the alignment directly, recently, but I did work on the 2nd IF transformer to fix the voltage issue on the IF 6K7.  I suspect it will need an alignment performed as a result.  I also suspect that in the reassembly I may have created a short somewhere, somehow, that is supplying different, higher voltages into the tuning section, in particular, the oscillator section, and sending the voltages on the oscillator portions of the 6A8 through the roof.

After testing the 6A8 tube in case of any miraculous shorts (it didn't have one, according to my tester, at least), I think my next step is to try cutting the proper connection to power from this section (red line in the lower left of image) and see if I find there's still power/continuity from elsewhere, outside of this circuit, and do process of elimination from there.  There shouldn't be, at least according to my reading of the schematic, any way for power to get into the oscillator plate except through the light green highlighted path, so if it is, then I've probably erred somewhere in the last 36 hours.

   

Best wishes,
Roy


Messages In This Thread
Beginning a 37-620 Restoration - by glyphmon - 03-28-2026, 01:58 AM
RE: Beginning a 37-620 Restoration - by morzh - 03-28-2026, 09:03 AM
RE: Beginning a 37-620 Restoration - by glyphmon - 03-28-2026, 09:28 AM
RE: Beginning a 37-620 Restoration - by RodB - 03-28-2026, 11:23 AM
RE: Beginning a 37-620 Restoration - by morzh - 03-28-2026, 03:29 PM
RE: Beginning a 37-620 Restoration - by morzh - 03-28-2026, 03:47 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 03-29-2026, 12:23 AM
RE: Beginning a 37-620 Restoration - by morzh - 03-29-2026, 10:10 AM
RE: Beginning a 37-620 Restoration - by DaleHCook - 03-29-2026, 10:27 AM
RE: Beginning a 37-620 Restoration - by glyphmon - 03-29-2026, 11:07 AM
RE: Beginning a 37-620 Restoration - by RodB - 03-29-2026, 11:07 AM
RE: Beginning a 37-620 Restoration - by glyphmon - 03-29-2026, 11:23 AM
RE: Beginning a 37-620 Restoration - by glyphmon - 03-29-2026, 12:03 PM
RE: Beginning a 37-620 Restoration - by morzh - 03-29-2026, 12:09 PM
RE: Beginning a 37-620 Restoration - by DaleHCook - 03-29-2026, 12:46 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 03-29-2026, 02:20 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 03-29-2026, 02:28 PM
RE: Beginning a 37-620 Restoration - by morzh - 03-29-2026, 03:01 PM
RE: Beginning a 37-620 Restoration - by RodB - 03-29-2026, 03:22 PM
RE: Beginning a 37-620 Restoration - by RodB - 03-29-2026, 04:09 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 03-29-2026, 04:52 PM
RE: Beginning a 37-620 Restoration - by Arran - 03-29-2026, 05:02 PM
RE: Beginning a 37-620 Restoration - by Arran - 03-29-2026, 07:44 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 03-29-2026, 08:02 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 04-07-2026, 10:55 AM
RE: Beginning a 37-620 Restoration - by RodB - 04-07-2026, 01:05 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 04-07-2026, 01:24 PM
RE: Beginning a 37-620 Restoration - by RodB - 04-07-2026, 02:19 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 04-07-2026, 03:18 PM
RE: Beginning a 37-620 Restoration - by morzh - 04-07-2026, 03:30 PM
RE: Beginning a 37-620 Restoration - by RodB - 04-07-2026, 07:04 PM
RE: Beginning a 37-620 Restoration - by morzh - 04-07-2026, 07:22 PM
RE: Beginning a 37-620 Restoration - by RodB - 04-07-2026, 07:53 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 04-07-2026, 10:02 PM
RE: Beginning a 37-620 Restoration - by morzh - 04-07-2026, 10:20 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 04-08-2026, 12:13 AM
RE: Beginning a 37-620 Restoration - by morzh - 04-08-2026, 08:20 AM
RE: Beginning a 37-620 Restoration - by MrFixr55 - 04-08-2026, 08:39 AM
RE: Beginning a 37-620 Restoration - by Arran - 04-08-2026, 01:13 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 04-11-2026, 05:40 PM
RE: Beginning a 37-620 Restoration - by morzh - 04-11-2026, 07:52 PM
RE: Beginning a 37-620 Restoration - by SRv2 - 04-11-2026, 09:31 PM
RE: Beginning a 37-620 Restoration - by morzh - 04-11-2026, 10:25 PM
RE: Beginning a 37-620 Restoration - by MrFixr55 - 04-11-2026, 11:32 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 04-11-2026, 11:50 PM
RE: Beginning a 37-620 Restoration - by radiorich - 04-12-2026, 12:58 AM
462ron - by 462ron - 04-12-2026, 08:37 AM
RE: Beginning a 37-620 Restoration - by morzh - 04-12-2026, 10:44 AM
RE: Beginning a 37-620 Restoration - by RodB - 04-12-2026, 11:31 AM
RE: Beginning a 37-620 Restoration - by SRv2 - 04-12-2026, 06:26 PM
RE: Beginning a 37-620 Restoration - by morzh - 04-12-2026, 07:51 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 04-12-2026, 09:10 PM
RE: Beginning a 37-620 Restoration - by SRv2 - 04-12-2026, 09:26 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 04-12-2026, 10:21 PM
RE: Beginning a 37-620 Restoration - by radiorich - 04-12-2026, 11:11 PM
462ron - by 462ron - 04-13-2026, 07:15 AM
RE: Beginning a 37-620 Restoration - by morzh - 04-13-2026, 07:58 AM
RE: Beginning a 37-620 Restoration - by MrFixr55 - 04-13-2026, 09:22 AM
RE: Beginning a 37-620 Restoration - by RodB - 04-13-2026, 11:12 AM
RE: Beginning a 37-620 Restoration - by glyphmon - 04-20-2026, 10:42 PM
RE: Beginning a 37-620 Restoration - by morzh - 04-20-2026, 10:48 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 04-20-2026, 10:55 PM
RE: Beginning a 37-620 Restoration - by DaleHCook - 04-21-2026, 07:07 AM
RE: Beginning a 37-620 Restoration - by morzh - 04-21-2026, 08:09 AM
RE: Beginning a 37-620 Restoration - by morzh - 04-21-2026, 08:12 AM
RE: Beginning a 37-620 Restoration - by DaleHCook - 04-21-2026, 08:22 AM
RE: Beginning a 37-620 Restoration - by radiorich - 04-21-2026, 08:28 AM
RE: Beginning a 37-620 Restoration - by DaleHCook - 04-21-2026, 01:54 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 04-21-2026, 03:29 PM
RE: Beginning a 37-620 Restoration - by Joe Rossi - 04-21-2026, 03:45 PM
RE: Beginning a 37-620 Restoration - by morzh - 04-21-2026, 04:47 PM
RE: Beginning a 37-620 Restoration - by RodB - 04-21-2026, 05:17 PM
RE: Beginning a 37-620 Restoration - by Arran - 04-21-2026, 05:44 PM
RE: Beginning a 37-620 Restoration - by morzh - 04-21-2026, 06:40 PM
RE: Beginning a 37-620 Restoration - by RodB - 04-21-2026, 07:10 PM
RE: Beginning a 37-620 Restoration - by morzh - 04-21-2026, 08:06 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 04-21-2026, 09:06 PM
RE: Beginning a 37-620 Restoration - by morzh - 04-21-2026, 10:16 PM
462ron - by 462ron - 04-22-2026, 07:33 AM
RE: Beginning a 37-620 Restoration - by glyphmon - 04-28-2026, 11:44 PM
RE: Beginning a 37-620 Restoration - by morzh - 04-29-2026, 08:04 AM
RE: Beginning a 37-620 Restoration - by DaleHCook - 04-29-2026, 08:35 AM
RE: Beginning a 37-620 Restoration - by RodB - 04-29-2026, 11:37 AM
RE: Beginning a 37-620 Restoration - by glyphmon - 05-02-2026, 11:05 PM
RE: Beginning a 37-620 Restoration - by RodB - 05-03-2026, 09:22 AM
RE: Beginning a 37-620 Restoration - by morzh - 05-03-2026, 10:59 AM
RE: Beginning a 37-620 Restoration - by glyphmon - 08-06-2026, 07:39 PM
RE: Beginning a 37-620 Restoration - by morzh - 08-07-2026, 01:40 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 08-07-2026, 05:21 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 09-10-2026, 08:15 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 09-13-2026, 02:26 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 09-23-2026, 09:05 PM
RE: Beginning a 37-620 Restoration - by MrFixr55 - 09-24-2026, 02:19 AM
RE: Beginning a 37-620 Restoration - by glyphmon - 09-24-2026, 10:01 AM
RE: Beginning a 37-620 Restoration - by MrFixr55 - 09-25-2026, 10:45 AM
RE: Beginning a 37-620 Restoration - by glyphmon - 09-25-2026, 11:50 AM
RE: Beginning a 37-620 Restoration - by MrFixr55 - 09-25-2026, 05:44 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 09-25-2026, 11:14 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 10-03-2026, 09:54 PM
RE: Beginning a 37-620 Restoration - by MrFixr55 - 10-03-2026, 10:31 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 10-03-2026, 10:39 PM
RE: Beginning a 37-620 Restoration - by radiorich - 10-03-2026, 11:59 PM
RE: Beginning a 37-620 Restoration - by MrFixr55 - 10-04-2026, 08:34 AM
RE: Beginning a 37-620 Restoration - by glyphmon - 10-04-2026, 10:20 AM
RE: Beginning a 37-620 Restoration - by radiorich - 10-04-2026, 11:59 AM
RE: Beginning a 37-620 Restoration - by glyphmon - 10-04-2026, 12:51 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 10-04-2026, 07:47 PM
RE: Beginning a 37-620 Restoration - by MrFixr55 - 10-04-2026, 08:49 PM
RE: Beginning a 37-620 Restoration - by radiorich - 10-04-2026, 09:12 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 10-04-2026, 10:14 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 10-05-2026, 10:05 PM
RE: Beginning a 37-620 Restoration - by MrFixr55 - 10-05-2026, 10:20 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 10-05-2026, 10:42 PM
RE: Beginning a 37-620 Restoration - by radiorich - 10-06-2026, 12:16 AM
RE: Beginning a 37-620 Restoration - by glyphmon - 10-06-2026, 12:59 AM
RE: Beginning a 37-620 Restoration - by MrFixr55 - 10-06-2026, 07:50 AM
462ron - by 462ron - 10-06-2026, 08:12 AM
RE: Beginning a 37-620 Restoration - by MrFixr55 - 10-06-2026, 08:15 AM
RE: Beginning a 37-620 Restoration - by glyphmon - 10-07-2026, 03:55 PM
RE: Beginning a 37-620 Restoration - by glyphmon - 10-10-2026, 03:47 PM



Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
Philco P45-6365 Universal Transformer Instruction Manual
Can anyone guide me to where this may be found?GRG — 03:00 PM
54C Complete Teardown/Rebuild
I don't think that I have encountered a 12Z3 before, curious how it uses one of those but includes a #43, which is a 25 ...Arran — 02:17 PM
HiFi (Chifi) tube amp build - but my own design.
It's the other forum. I'm also in DIY, but mostly read there. Honestly, I kinda jumped into this without much thought to...TV MAN — 10:43 AM
Philco 71 Code 125
Hello,  I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM

[-]
Who's Online
There are currently 1836 online users. [Complete List]
» 2 Member(s) | 1834 Guest(s)
AvatarAvatar

>