Rod Pentode TRF

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Rod Pentode TRF

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Amie

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Posts: 479
Location: Norfolk

#37

03-09-2021, 01:07 PM

Murphyv310 Wrote:As an aside.
The low voltage 1J42A is greatly effected by external magnetism the others to a lesser extent.
Put a coil close to the valve with an AF signal and low and behold you get audio out, a magnet when it gets close results in lower gain, we of course know the reason, perhaps a crude AGC with a coil strategically placed .......... OK where's my coat

Oh I'm trying that one! AGC deflection coil!

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Messages In This Thread

Rod Pentode TRF - by Murphyv310 - 29-08-2021, 07:58 PM

RE: Rod Pentode TRF - by Amie - 29-08-2021, 08:45 PM

RE: Rod Pentode TRF - by Murphyv310 - 29-08-2021, 08:51 PM

RE: Rod Pentode TRF - by Kalee20 - 30-08-2021, 10:24 PM

RE: Rod Pentode TRF - by Amie - 31-08-2021, 12:24 AM

RE: Rod Pentode TRF - by Kalee20 - 30-08-2021, 07:43 AM

RE: Rod Pentode TRF - by ppppenguin - 30-08-2021, 08:09 AM

RE: Rod Pentode TRF - by Amie - 30-08-2021, 01:44 PM

RE: Rod Pentode TRF - by ppppenguin - 30-08-2021, 01:58 PM

RE: Rod Pentode TRF - by BusyBee - 30-08-2021, 02:36 PM

RE: Rod Pentode TRF - by Murphyv310 - 31-08-2021, 07:37 AM

RE: Rod Pentode TRF - by AdrianPH - 31-08-2021, 08:47 AM

RE: Rod Pentode TRF - by AdrianPH - 31-08-2021, 06:17 PM

RE: Rod Pentode TRF - by Amie - 31-08-2021, 07:07 PM

RE: Rod Pentode TRF - by Murphyv310 - 31-08-2021, 06:36 PM

RE: Rod Pentode TRF - by AdrianPH - 31-08-2021, 08:47 PM

RE: Rod Pentode TRF - by Amie - 01-09-2021, 12:26 AM

RE: Rod Pentode TRF - by BusyBee - 01-09-2021, 08:08 AM

RE: Rod Pentode TRF - by Kalee20 - 01-09-2021, 08:38 AM

RE: Rod Pentode TRF - by Amie - 01-09-2021, 09:40 AM

RE: Rod Pentode TRF - by BusyBee - 01-09-2021, 05:16 PM

RE: Rod Pentode TRF - by Kalee20 - 03-09-2021, 12:28 AM

RE: Rod Pentode TRF - by BusyBee - 03-09-2021, 12:19 PM

RE: Rod Pentode TRF - by Murphyv310 - 01-09-2021, 08:57 PM

RE: Rod Pentode TRF - by BusyBee - 02-09-2021, 06:32 PM

RE: Rod Pentode TRF - by Kalee20 - 01-09-2021, 09:08 PM

RE: Rod Pentode TRF - by Amie - 01-09-2021, 09:33 PM

RE: Rod Pentode TRF - by Kalee20 - 02-09-2021, 12:17 AM

RE: Rod Pentode TRF - by Murphyv310 - 02-09-2021, 07:58 AM

RE: Rod Pentode TRF - by Murphyv310 - 02-09-2021, 01:31 PM

RE: Rod Pentode TRF - by Kalee20 - 02-09-2021, 03:54 PM

RE: Rod Pentode TRF - by Murphyv310 - 02-09-2021, 07:54 PM

RE: Rod Pentode TRF - by Murphyv310 - 02-09-2021, 10:58 PM

RE: Rod Pentode TRF - by Amie - 03-09-2021, 12:34 PM

RE: Rod Pentode TRF - by ppppenguin - 05-09-2021, 07:25 AM

RE: Rod Pentode TRF - by Murphyv310 - 03-09-2021, 12:46 PM

RE: Rod Pentode TRF - by Murphyv310 - 03-09-2021, 12:53 PM

RE: Rod Pentode TRF - by Amie - 03-09-2021, 01:07 PM

RE: Rod Pentode TRF - by Kalee20 - 03-09-2021, 03:04 PM

RE: Rod Pentode TRF - by BusyBee - 03-09-2021, 05:42 PM

RE: Rod Pentode TRF - by Murphyv310 - 04-09-2021, 07:05 AM

RE: Rod Pentode TRF - by Murphyv310 - 04-09-2021, 03:56 PM

RE: Rod Pentode TRF - by BusyBee - 05-09-2021, 07:15 AM

RE: Rod Pentode TRF - by Amie - 05-09-2021, 11:06 AM

RE: Rod Pentode TRF - by ppppenguin - 05-09-2021, 11:37 AM

RE: Rod Pentode TRF - by Murphyv310 - 06-09-2021, 02:31 PM

RE: Rod Pentode TRF - by Kalee20 - 06-09-2021, 09:23 PM

RE: Rod Pentode TRF - by Amie - 06-09-2021, 09:27 PM

RE: Rod Pentode TRF - by Murphyv310 - 07-09-2021, 08:12 AM

RE: Rod Pentode TRF - by Amie - 07-09-2021, 10:19 AM

RE: Rod Pentode TRF - by BusyBee - 08-09-2021, 06:44 AM

RE: Rod Pentode TRF - by Murphyv310 - 07-09-2021, 04:08 PM

RE: Rod Pentode TRF - by Murphyv310 - 08-09-2021, 08:25 PM

RE: Rod Pentode TRF - by Amie - 09-09-2021, 12:22 AM

RE: Rod Pentode TRF - by BusyBee - 10-09-2021, 05:48 PM

RE: Rod Pentode TRF - by Murphyv310 - 09-09-2021, 07:03 AM

RE: Rod Pentode TRF - by Amie - 09-09-2021, 10:07 AM

RE: Rod Pentode TRF - by BusyBee - 09-09-2021, 06:18 PM

RE: Rod Pentode TRF - by Murphyv310 - 09-09-2021, 08:59 PM

RE: Rod Pentode TRF - by Amie - 10-09-2021, 01:09 AM

RE: Rod Pentode TRF - by BusyBee - 10-09-2021, 07:09 AM

RE: Rod Pentode TRF - by Murphyv310 - 10-09-2021, 07:12 AM

RE: Rod Pentode TRF - by Kalee20 - 11-09-2021, 11:55 AM

RE: Rod Pentode TRF - by Amie - 10-09-2021, 04:26 PM

RE: Rod Pentode TRF - by Amie - 10-09-2021, 06:27 PM

RE: Rod Pentode TRF - by Murphyv310 - 10-09-2021, 06:41 PM

RE: Rod Pentode TRF - by Amie - 10-09-2021, 07:01 PM

RE: Rod Pentode TRF - by Murphyv310 - 10-09-2021, 06:35 PM

RE: Rod Pentode TRF - by Kalee20 - 10-09-2021, 06:40 PM

RE: Rod Pentode TRF - by Amie - 10-09-2021, 06:58 PM

RE: Rod Pentode TRF - by Murphyv310 - 10-09-2021, 07:07 PM

RE: Rod Pentode TRF - by BusyBee - 11-09-2021, 07:48 AM

RE: Rod Pentode TRF - by Kalee20 - 11-09-2021, 08:35 AM

RE: Rod Pentode TRF - by BusyBee - 17-09-2021, 06:30 PM

RE: Rod Pentode TRF - by Mike Watterson - 19-09-2021, 01:49 PM

RE: Rod Pentode TRF - by BusyBee - 21-09-2021, 06:38 AM

RE: Rod Pentode TRF - by Mike Watterson - 22-09-2021, 02:18 PM

RE: Rod Pentode TRF - by Kalee20 - 22-09-2021, 03:48 PM

RE: Rod Pentode TRF - by Mike Watterson - 23-09-2021, 09:45 AM

RE: Rod Pentode TRF - by Kalee20 - 23-09-2021, 07:13 PM

RE: Rod Pentode TRF - by Murphyv310 - 11-09-2021, 08:51 AM

RE: Rod Pentode TRF - by Murphyv310 - 11-09-2021, 09:11 AM

RE: Rod Pentode TRF - by AdrianPH - 11-09-2021, 01:31 PM

RE: Rod Pentode TRF - by BusyBee - 12-09-2021, 04:47 PM

RE: Rod Pentode TRF - by Kalee20 - 12-09-2021, 09:18 PM

RE: Rod Pentode TRF - by Mike Watterson - 18-09-2021, 02:25 PM

RE: Rod Pentode TRF - by Kalee20 - 18-09-2021, 05:47 PM

RE: Rod Pentode TRF - by Kalee20 - 18-09-2021, 09:26 PM

RE: Rod Pentode TRF - by Mike Watterson - 19-09-2021, 01:45 PM

RE: Rod Pentode TRF - by Murphyv310 - 18-09-2021, 06:08 PM

RE: Rod Pentode TRF - by AdrianPH - 22-09-2021, 06:53 PM

RE: Rod Pentode TRF - by Mike Watterson - 23-09-2021, 09:39 AM

RE: Rod Pentode TRF - by BusyBee - 23-09-2021, 06:47 AM

RE: Rod Pentode TRF - by Mike Watterson - 23-09-2021, 10:22 PM

RE: Rod Pentode TRF - by Kalee20 - 24-09-2021, 07:36 AM

RE: Rod Pentode TRF - by AdrianPH - 27-09-2021, 09:22 PM

RE: Rod Pentode TRF - by Murphyv310 - 08-10-2021, 07:25 PM

RE: Rod Pentode TRF - by Murphyv310 - 09-10-2021, 02:10 PM

RE: Rod Pentode TRF - by Murphyv310 - 09-10-2021, 02:59 PM

RE: Rod Pentode TRF - by Kalee20 - 10-10-2021, 08:51 AM

RE: Rod Pentode TRF - by BusyBee - 10-10-2021, 05:31 PM

RE: Rod Pentode TRF - by Murphyv310 - 10-10-2021, 11:02 AM

RE: Rod Pentode TRF - by Murphyv310 - 10-10-2021, 11:35 AM

RE: Rod Pentode TRF - by Murphyv310 - 10-10-2021, 11:42 AM

RE: Rod Pentode TRF - by Mike Watterson - 10-10-2021, 12:30 PM

RE: Rod Pentode TRF - by Kalee20 - 10-10-2021, 11:56 AM

RE: Rod Pentode TRF - by Murphyv310 - 10-10-2021, 01:12 PM

RE: Rod Pentode TRF - by Mike Watterson - 10-10-2021, 05:07 PM

RE: Rod Pentode TRF - by Mike Watterson - 10-10-2021, 06:25 PM

RE: Rod Pentode TRF - by mister35mm - 19-01-2022, 09:34 AM

RE: Rod Pentode TRF - by BusyBee - 20-01-2022, 01:17 PM

RE: Rod Pentode TRF - by Murphyv310 - 21-01-2022, 09:53 AM

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