ID This Model

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ID This Model

MrFixr55
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Posts: 2,327
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#12

03-27-2026, 02:45 PM

100 Watts? Out of 2 '31s at 180V with cathode bias? According to the RCA Receiving Tube Manual RC10 (Ca 1932?), a single 31 in Class A operation with cathode bias and 180V B+ is 375 mW (0.375W). In push pull, I suspect that the most that you will squeeze out of a pair of 31s is about 800 mW. Tubes designed for Class B Push Pull service in battery radios such as 19s or a pair of 49s is about 2W.

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Messages In This Thread

ID This Model - by RodB - 03-26-2026, 11:09 AM

RE: ID This Model - by morzh - 03-26-2026, 07:23 PM

RE: ID This Model - by morzh - 03-26-2026, 08:38 PM

RE: ID This Model - by Joe Rossi - 03-26-2026, 09:34 PM

RE: ID This Model - by morzh - 03-26-2026, 09:40 PM

RE: ID This Model - by DaleHCook - 03-26-2026, 10:20 PM

RE: ID This Model - by morzh - 03-27-2026, 08:51 AM

RE: ID This Model - by RodB - 03-27-2026, 01:59 PM

RE: ID This Model - by morzh - 03-27-2026, 02:04 PM

RE: ID This Model - by Arran - 03-27-2026, 02:40 PM

RE: ID This Model - by RodB - 03-27-2026, 02:40 PM

RE: ID This Model - by MrFixr55 - 03-27-2026, 02:45 PM

RE: ID This Model - by RodB - 03-27-2026, 02:53 PM

RE: ID This Model - by morzh - 03-27-2026, 06:44 PM

RE: ID This Model - by DaleHCook - 03-27-2026, 07:21 PM

RE: ID This Model - by morzh - 03-27-2026, 08:07 PM

RE: ID This Model - by RodB - 03-27-2026, 09:54 PM

RE: ID This Model - by MrFixr55 - 03-27-2026, 10:15 PM

RE: ID This Model - by RodB - 03-27-2026, 11:47 PM

RE: ID This Model - by Joe Rossi - 03-28-2026, 05:51 AM

RE: ID This Model - by morzh - 03-28-2026, 09:04 AM

RE: ID This Model - by Joe Rossi - 03-28-2026, 09:49 AM

RE: ID This Model - by RodB - 03-28-2026, 10:24 AM

RE: ID This Model - by DaleHCook - 03-28-2026, 10:24 AM

RE: ID This Model - by RodB - 03-28-2026, 10:30 AM

RE: ID This Model - by RodB - 03-28-2026, 10:41 AM

RE: ID This Model - by morzh - 03-28-2026, 03:27 PM

RE: ID This Model - by DaleHCook - 03-28-2026, 03:54 PM

RE: ID This Model - by morzh - 03-28-2026, 04:22 PM

RE: ID This Model - by MrFixr55 - 03-28-2026, 06:38 PM

RE: ID This Model - by morzh - 03-28-2026, 06:52 PM

RE: ID This Model - by DaleHCook - 03-29-2026, 10:01 AM

RE: ID This Model - by morzh - 03-29-2026, 10:29 AM

RE: ID This Model - by RodB - 03-29-2026, 11:31 AM

RE: ID This Model - by Arran - 03-29-2026, 05:13 PM

RE: ID This Model - by DaleHCook - 03-29-2026, 08:16 PM

RE: ID This Model - by morzh - 03-29-2026, 09:08 PM

RE: ID This Model - by Arran - 03-29-2026, 10:18 PM

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