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Philco 570
rfeenstra
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Posts: 1,193
Threads: 49
Joined: Oct 2017
City: Allendale, MI
#56

05-11-2019, 10:32 PM
The AVC by itself is worth the mod.  Certainly won't be original any more, but should perform much better.  I have no 35's so I just emailed Bob to see if he has 6!  Also need a couple of 500K pots.  Just did some reading on diode detectors in tube radios.  they can be made to perform better than the original tube diodes but it takes a bit of work with forward biasing and temperature compensation.  Too much for this purpose.  I'll just stick with the germanium diode though this guy said it was not the best for tube radios.  He had a lot of math to explain why.  More than I wanted to plow through!
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Messages In This Thread
Philco 570 - by rfeenstra - 04-19-2019, 09:47 PM
RE: Philco 570 - by Greggshere - 04-19-2019, 10:59 PM
RE: Philco 570 - by mikethedruid - 04-19-2019, 11:37 PM
RE: Philco 570 - by Jake Blake - 04-19-2019, 11:47 PM
RE: Philco 570 - by rfeenstra - 04-19-2019, 11:58 PM
RE: Philco 570 - by Nathan Slingerland - 04-20-2019, 12:44 AM
RE: Philco 570 - by rfeenstra - 04-20-2019, 09:32 AM
RE: Philco 570 - by rfeenstra - 04-20-2019, 10:09 AM
RE: Philco 570 - by rfeenstra - 04-20-2019, 11:40 PM
RE: Philco 570 - by KCMike - 04-21-2019, 07:21 AM
RE: Philco 570 - by rfeenstra - 04-21-2019, 09:39 PM
RE: Philco 570 - by rfeenstra - 04-22-2019, 12:26 PM
RE: Philco 570 - by Jake Blake - 04-22-2019, 01:36 PM
RE: Philco 570 - by rfeenstra - 04-22-2019, 05:22 PM
RE: Philco 570 - by Jake Blake - 04-22-2019, 11:03 PM
RE: Philco 570 - by rfeenstra - 04-27-2019, 04:51 PM
RE: Philco 570 - by rfeenstra - 04-27-2019, 05:02 PM
RE: Philco 570 - by Phlogiston - 04-27-2019, 05:59 PM
RE: Philco 570 - by rfeenstra - 04-28-2019, 12:12 AM
RE: Philco 570 - by Greggshere - 04-28-2019, 11:32 AM
RE: Philco 570 - by Jake Blake - 04-28-2019, 11:44 AM
RE: Philco 570 - by rfeenstra - 04-28-2019, 01:28 PM
RE: Philco 570 - by Steve Davis - 04-28-2019, 06:06 PM
RE: Philco 570 - by Jake Blake - 04-28-2019, 08:25 PM
RE: Philco 570 - by rfeenstra - 04-29-2019, 01:37 AM
RE: Philco 570 - by rfeenstra - 04-29-2019, 10:51 AM
RE: Philco 570 - by Radioroslyn - 04-29-2019, 11:00 AM
RE: Philco 570 - by Steve Davis - 04-29-2019, 01:22 PM
RE: Philco 570 - by Phlogiston - 04-29-2019, 01:56 PM
RE: Philco 570 - by Jake Blake - 04-29-2019, 03:11 PM
RE: Philco 570 - by rfeenstra - 04-30-2019, 03:34 PM
RE: Philco 570 - by Jake Blake - 04-30-2019, 03:41 PM
RE: Philco 570 - by morzh - 04-30-2019, 03:48 PM
RE: Philco 570 - by rfeenstra - 05-02-2019, 08:44 PM
RE: Philco 570 - by Greggshere - 05-05-2019, 01:01 AM
RE: Philco 570 - by rfeenstra - 05-05-2019, 11:05 PM
RE: Philco 570 - by Greggshere - 05-09-2019, 10:25 AM
RE: Philco 570 - by Ron Ramirez - 05-09-2019, 09:03 PM
RE: Philco 570 - by rfeenstra - 05-09-2019, 09:13 PM
RE: Philco 570 - by Ron Ramirez - 05-10-2019, 09:37 AM
RE: Philco 570 - by Ed Locker - 05-10-2019, 10:01 AM
RE: Philco 570 - by Ron Ramirez - 05-10-2019, 12:40 PM
RE: Philco 570 - by Ed Locker - 05-10-2019, 07:10 PM
RE: Philco 570 - by rfeenstra - 05-10-2019, 10:13 PM
RE: Philco 570 - by Ed Locker - 05-11-2019, 08:58 AM
RE: Philco 570 - by 462ron - 05-11-2019, 09:01 AM
RE: Philco 570 - by Ed Locker - 05-11-2019, 09:10 AM
RE: Philco 570 - by Ron Ramirez - 05-11-2019, 09:30 AM
RE: Philco 570 - by Ed Locker - 05-11-2019, 09:35 AM
RE: Philco 570 - by 462ron - 05-11-2019, 05:30 PM
RE: Philco 570 - by Phlogiston - 05-11-2019, 05:50 PM
RE: Philco 570 - by Jake Blake - 05-11-2019, 05:58 PM
RE: Philco 570 - by rfeenstra - 05-11-2019, 06:59 PM
RE: Philco 570 - by rfeenstra - 05-11-2019, 07:24 PM
RE: Philco 570 - by Ron Ramirez - 05-11-2019, 09:39 PM
RE: Philco 570 - by rfeenstra - 05-11-2019, 10:32 PM
RE: Philco 570 - by Ed Locker - 05-12-2019, 07:46 PM
RE: Philco 570 - by rfeenstra - 05-13-2019, 08:53 PM
RE: Philco 570 - by Ed Locker - 05-14-2019, 09:25 AM
RE: Philco 570 - by morzh - 05-14-2019, 09:27 AM
RE: Philco 570 - by Ed Locker - 05-14-2019, 09:37 AM
RE: Philco 570 - by Radioroslyn - 05-14-2019, 09:47 AM
RE: Philco 570 - by Ron Ramirez - 05-14-2019, 09:59 AM
RE: Philco 570 - by Ron Ramirez - 05-14-2019, 10:07 AM
RE: Philco 570 - by rfeenstra - 05-14-2019, 03:27 PM
RE: Philco 570 - by rfeenstra - 05-14-2019, 03:56 PM
RE: Philco 570 - by morzh - 05-14-2019, 04:12 PM
RE: Philco 570 - by rfeenstra - 05-14-2019, 08:49 PM
RE: Philco 570 - by morzh - 05-14-2019, 09:37 PM
RE: Philco 570 - by Jake Blake - 05-14-2019, 09:47 PM
RE: Philco 570 - by morzh - 05-15-2019, 08:05 AM
RE: Philco 570 - by Ron Ramirez - 05-15-2019, 08:09 AM
RE: Philco 570 - by rfeenstra - 05-15-2019, 08:22 AM
RE: Philco 570 - by morzh - 05-15-2019, 08:56 AM
RE: Philco 570 - by Ed Locker - 05-15-2019, 09:15 AM
RE: Philco 570 - by morzh - 05-15-2019, 09:52 AM
RE: Philco 570 - by Ed Locker - 05-15-2019, 10:11 AM
RE: Philco 570 - by Ron Ramirez - 05-15-2019, 10:41 AM
RE: Philco 570 - by morzh - 05-15-2019, 10:55 AM
RE: Philco 570 - by rfeenstra - 05-15-2019, 12:56 PM
RE: Philco 570 - by Jake Blake - 05-15-2019, 02:21 PM
RE: Philco 570 - by rfeenstra - 05-15-2019, 02:25 PM
RE: Philco 570 - by Jake Blake - 05-15-2019, 02:28 PM
RE: Philco 570 - by Jake Blake - 05-15-2019, 02:30 PM
RE: Philco 570 - by mikethedruid - 05-15-2019, 06:09 PM
RE: Philco 570 - by Jake Blake - 05-15-2019, 06:25 PM
RE: Philco 570 - by rfeenstra - 05-21-2019, 11:37 PM
RE: Philco 570 - by rfeenstra - 06-11-2019, 10:41 PM
RE: Philco 570 - by Ron Ramirez - 06-12-2019, 08:51 PM
RE: Philco 570 - by rfeenstra - 06-12-2019, 10:14 PM
RE: Ron. cancer post - by Jake Blake - 05-15-2019, 01:10 PM
RE: Ron. cancer post - by Ron Ramirez - 05-15-2019, 01:21 PM
RE: Ron. cancer post - by Jake Blake - 05-15-2019, 01:24 PM
RE: Ron. cancer post - by morzh - 05-15-2019, 01:29 PM
RE: Ron. cancer post - by Ed Locker - 05-15-2019, 02:13 PM
RE: Ron. cancer post - by Jake Blake - 05-15-2019, 02:17 PM
RE: Ron. cancer post - by morzh - 05-15-2019, 02:18 PM
RE: Ron. cancer post - by morzh - 05-15-2019, 02:19 PM
RE: Ron. cancer post - by Ron Ramirez - 05-15-2019, 02:24 PM



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