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Philco 90 with Twin 47 Tubes in PP
05-05-2014, 05:23 PM
What was the rational behind Philco using an autodyne oscillator in the later model 90s and the 91, 71, 89 etc? Was this a scheme to cut down on the number of tubes or was it another dodge to avoid paying royalties to RCA? I would have thought Philco would have stuck with whatever worked as a front end rather then re-inventing the wheel, but then again not everything Philco did was exactly rational.
Regards Arran
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Messages In This Thread
Philco 90 with Twin 47 Tubes in PP - by joybird - 05-05-2014, 11:00 AM
RE: Philco 90 with Twin 47 Tubes in PP - by morzh - 05-05-2014, 02:39 PM
RE: Philco 90 with Twin 47 Tubes in PP - by TA Forbes - 05-05-2014, 02:39 PM
RE: Philco 90 with Twin 47 Tubes in PP - by joybird - 05-05-2014, 03:02 PM
RE: Philco 90 with Twin 47 Tubes in PP - by Ron Ramirez - 05-05-2014, 03:46 PM
RE: Philco 90 with Twin 47 Tubes in PP - by Ron Ramirez - 05-05-2014, 03:51 PM
RE: Philco 90 with Twin 47 Tubes in PP - by morzh - 05-05-2014, 03:55 PM
RE: Philco 90 with Twin 47 Tubes in PP - by Ron Ramirez - 05-05-2014, 04:01 PM
RE: Philco 90 with Twin 47 Tubes in PP - by joybird - 05-05-2014, 04:17 PM
RE: Philco 90 with Twin 47 Tubes in PP - by Arran - 05-05-2014, 05:23 PM
RE: Philco 90 with Twin 47 Tubes in PP - by joybird - 05-05-2014, 05:42 PM
RE: Philco 90 with Twin 47 Tubes in PP - by Arran - 05-05-2014, 06:05 PM
RE: Philco 90 with Twin 47 Tubes in PP - by joybird - 05-05-2014, 06:30 PM
RE: Philco 90 with Twin 47 Tubes in PP - by morzh - 05-05-2014, 06:45 PM
RE: Philco 90 with Twin 47 Tubes in PP - by gregb - 05-05-2014, 08:45 PM
RE: Philco 90 with Twin 47 Tubes in PP - by gregb - 05-05-2014, 08:49 PM
RE: Philco 90 with Twin 47 Tubes in PP - by morzh - 05-05-2014, 09:37 PM
RE: Philco 90 with Twin 47 Tubes in PP - by joybird - 05-06-2014, 03:24 AM
RE: Philco 90 with Twin 47 Tubes in PP - by joybird - 05-07-2014, 10:12 AM
RE: Philco 90 with Twin 47 Tubes in PP - by morzh - 05-07-2014, 01:21 PM
RE: Philco 90 with Twin 47 Tubes in PP - by Arran - 05-07-2014, 10:48 PM
RE: Philco 90 with Twin 47 Tubes in PP - by joybird - 05-13-2014, 01:53 PM
RE: Philco 90 with Twin 47 Tubes in PP - by joybird - 05-14-2014, 09:57 AM
RE: Philco 90 with Twin 47 Tubes in PP - by morzh - 05-14-2014, 10:15 AM
RE: Philco 90 with Twin 47 Tubes in PP - by joybird - 05-14-2014, 12:23 PM
RE: Philco 90 with Twin 47 Tubes in PP - by morzh - 05-14-2014, 01:11 PM
RE: Philco 90 with Twin 47 Tubes in PP - by gregb - 05-14-2014, 03:22 PM
RE: Philco 90 with Twin 47 Tubes in PP - by joybird - 05-15-2014, 12:18 PM
RE: Philco 90 with Twin 47 Tubes in PP - by morzh - 05-15-2014, 12:26 PM
RE: Philco 90 with Twin 47 Tubes in PP - by joybird - 05-15-2014, 12:33 PM
RE: Philco 90 with Twin 47 Tubes in PP - by joybird - 05-15-2014, 04:07 PM
RE: Philco 90 with Twin 47 Tubes in PP - by Warren - 05-15-2014, 06:46 PM
RE: Philco 90 with Twin 47 Tubes in PP - by Arran - 05-16-2014, 12:09 AM
RE: Philco 90 with Twin 47 Tubes in PP - by joybird - 05-16-2014, 05:28 AM
RE: Philco 90 with Twin 47 Tubes in PP - by Arran - 05-17-2014, 01:40 AM
RE: Philco 90 with Twin 47 Tubes in PP - by joybird - 05-20-2014, 06:40 AM
RE: Philco 90 with Twin 47 Tubes in PP - by TA Forbes - 05-20-2014, 08:42 AM
RE: Philco 90 with Twin 47 Tubes in PP - by joybird - 05-28-2014, 05:38 AM
RE: Philco 90 with Twin 47 Tubes in PP - by TA Forbes - 05-28-2014, 09:29 AM
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