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

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

38-690 Code 125
#54

As a side, I monitored the voltages on the 1st and 2nd IF tube grids; they both were around -2.4v and did not seem to vary with trimming. I kinda thought that 77 should vary the signal to the IF AVC tube, but perhaps the signal was not strong enough.
I might try a couple of diodes in that tube base, don’t know if I have any Schottky type.....


Messages In This Thread
38-690 Code 125 - by RGK20m3 - 11-24-2021, 08:26 PM
RE: 38-690 Code 125 - by klondike98 - 11-24-2021, 09:01 PM
RE: 38-690 Code 125 - by RGK20m3 - 11-26-2021, 05:41 PM
RE: 38-690 Code 125 - by klondike98 - 11-26-2021, 06:21 PM
RE: 38-690 Code 125 - by RGK20m3 - 11-26-2021, 10:29 PM
RE: 38-690 Code 125 - by RGK20m3 - 12-02-2021, 07:35 PM
RE: 38-690 Code 125 - by morzh - 12-02-2021, 08:09 PM
RE: 38-690 Code 125 - by Ron Ramirez - 12-02-2021, 08:58 PM
RE: 38-690 Code 125 - by morzh - 12-02-2021, 09:02 PM
RE: 38-690 Code 125 - by radiorich - 12-02-2021, 10:01 PM
RE: 38-690 Code 125 - by Ron Ramirez - 12-02-2021, 11:41 PM
RGK20m3 - by RGK20m3 - 12-05-2021, 06:03 PM
RE: 38-690 Code 125 - by David - 12-05-2021, 07:19 PM
RE: 38-690 Code 125 - by klondike98 - 12-09-2021, 08:08 PM
RGK20m3 - by RGK20m3 - 12-10-2021, 02:54 PM
RE: 38-690 Code 125 - by Mondial - 12-10-2021, 06:42 PM
RE: 38-690 Code 125 - by RGK20m3 - 12-10-2021, 07:15 PM
RE: 38-690 Code 125 - by morzh - 12-10-2021, 07:27 PM
RE: 38-690 Code 125 - by Mondial - 12-10-2021, 07:40 PM
RE: 38-690 Code 125 - by mikethedruid - 12-10-2021, 08:01 PM
RGK20m3 - by RGK20m3 - 12-10-2021, 10:09 PM
RGK20m3 - by RGK20m3 - 12-11-2021, 12:14 PM
RE: 38-690 Code 125 - by Mondial - 12-11-2021, 01:58 PM
RGK20m3 - by RGK20m3 - 12-11-2021, 05:41 PM
RE: 38-690 Code 125 - by Mondial - 12-11-2021, 06:48 PM
RE: 38-690 Code 125 - by tbone - 12-12-2021, 02:27 PM
RGK20m3 - by RGK20m3 - 12-13-2021, 08:24 PM
RE: 38-690 Code 125 - by Mondial - 12-14-2021, 10:22 AM
RE: 38-690 Code 125 - by morzh - 12-14-2021, 12:40 PM
RE: 38-690 Code 125 - by Ron Ramirez - 12-14-2021, 01:40 PM
RE: 38-690 Code 125 - by RGK20m3 - 12-14-2021, 03:25 PM
RE: 38-690 Code 125 - by morzh - 12-14-2021, 03:35 PM
RE: 38-690 Code 125 - by Mondial - 12-14-2021, 04:06 PM
RE: 38-690 Code 125 - by Ron Ramirez - 12-14-2021, 04:42 PM
RGK20m3 - by RGK20m3 - 12-14-2021, 10:32 PM
RE: 38-690 Code 125 - by Ron Ramirez - 12-14-2021, 10:58 PM
RGK20m3 - by RGK20m3 - 12-15-2021, 09:01 AM
RGK20m3 - by RGK20m3 - 12-15-2021, 11:55 AM
RE: 38-690 Code 125 - by Mondial - 12-15-2021, 03:02 PM
RGK20m3 - by RGK20m3 - 12-15-2021, 05:14 PM
RE: 38-690 Code 125 - by RGK20m3 - 01-02-2022, 06:05 PM
RE: 38-690 Code 125 - by Greg - 01-02-2022, 06:42 PM
RE: 38-690 Code 125 - by Mondial - 01-02-2022, 07:59 PM
RGK20m3 - by RGK20m3 - 01-03-2022, 12:36 PM
RE: 38-690 Code 125 - by Mondial - 01-03-2022, 01:43 PM
RGK20m3 - by RGK20m3 - 01-04-2022, 09:12 AM
RE: 38-690 Code 125 - by Mondial - 01-04-2022, 12:21 PM
RE: 38-690 Code 125 - by RGK20m3 - 01-04-2022, 07:01 PM
RGK20m3 - by RGK20m3 - 01-05-2022, 12:36 PM
RE: 38-690 Code 125 - by Mondial - 01-05-2022, 01:56 PM
RGK20m3 - by RGK20m3 - 01-05-2022, 02:57 PM
RE: 38-690 Code 125 - by Mondial - 01-05-2022, 05:59 PM
RGK20m3 - by RGK20m3 - 01-06-2022, 07:39 PM
RE: 38-690 Code 125 - by Mondial - 01-07-2022, 11:44 AM
RE: 38-690 Code 125 - by RGK20m3 - 01-07-2022, 01:03 PM
RGK20m3 - by RGK20m3 - 01-07-2022, 01:32 PM
RE: 38-690 Code 125 - by Mondial - 01-07-2022, 01:49 PM
RGK20m3 - by RGK20m3 - 01-07-2022, 02:31 PM
RGK20m3 - by RGK20m3 - 01-29-2022, 01:25 PM
RE: 38-690 Code 125 - by Brad Winder - 02-02-2022, 08:30 PM
RGK20m3 - by RGK20m3 - 02-04-2022, 07:41 PM
RE: 38-690 Code 125 - by Brad Winder - 02-06-2022, 02:53 PM
RE: 38-690 Code 125 - by RGK20m3 - 02-07-2022, 11:26 AM
38-690 RF Alignment - by RGK20m3 - 12-09-2021, 02:54 PM
RE: 38-690 RF Alignment - by morzh - 12-09-2021, 04:16 PM
RE: 38-690 RF Alignment - by RGK20m3 - 12-09-2021, 04:40 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
My Philco 37-116 Restore
Are you measuring relative to the centertap or the GND?morzh — 11:57 PM
Philco 610B oscillator wiring
Still not clear on the wiring interface between the 6A7 and oscillator. After refering to the available schematics and s...Tubester — 07:18 PM
Refinishing Ideas
My 37-116 code 121 is the best sounding radio i have...a daily driver. Since we are talking about "changes". ...poulsbobill — 07:18 PM
My Philco 37-116 Restore
Hello, I finally got brave enough to take the cans off the Expander Unit. Got the grid cap wires replaced and back toget...dconant — 06:50 PM
Zenith H725
I got into the first AM IF can today, and found its mica was cracked. Amazing that it was still working. This one makes ...EdHolland — 06:10 PM
Philco model #20
AHH HA , I got it and can’t thank you fellows enough , when I changed the capacitors I took the advice and did not unsol...onlyrick — 02:24 PM
Zenith H725
Hello Ed, yes, I like letting projects run for few days to make sure they don't start acting up . Sincerely Richardradiorich — 01:03 PM
Philco 46-480 Electronic Restoration
I am almost finished with this restoration. All which remains is the power transformer. I cleaned it up some time ago, b...jrblasde — 12:41 PM
Philco model #20
I seem to recall in some TRF sets there being a Local/Distance toggle switch that removes the B+ from the first 24 rf tu...RodB — 09:46 AM
Refinishing Ideas
Hi Doppelganger, After rereading your thread, did you mount the Zenith speakers in the two bottom left and right pos...MrFixr55 — 09:39 AM

[-]
Who's Online
There are currently 1680 online users. [Complete List]
» 1 Member(s) | 1679 Guest(s)
Avatar

>