Philco 90 1-47 Triode

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Philco 90 1-47 Triode

MrFixr55
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Posts: 1,128
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City: Greenlawn State, Province, Country: NY

#17

06-25-2023, 10:22 PM

Mike, that is a beautiful cabinet. If the speaker has a paper or fiber "spider", it will sound better than the metal spidered Model 20 speaker which seriously limited the "excursion" of the cone.

BTW, do NOT run this radio without the speaker connected, the screen grid in the 47 may overcurrent and burn out, shorting the tube.

Terry, the 47 is, in fact, a pentode. The tube has only 5 pins but the suppressor grid is connected to the filament - heater at mid-point. That is why they can get away with 5 pins.

"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
"Let us begin to do good"- St. Francis

Best Regards,

MrFixr55

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Philco 90 1-47 Triode - by Mike_RF - 06-25-2023, 05:02 PM

RE: Philco 90 1-47 Triode - by morzh - 06-25-2023, 07:10 PM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-25-2023, 07:18 PM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-25-2023, 08:28 PM

RE: Philco 90 1-47 Triode - by Radioroslyn - 06-25-2023, 08:43 PM

RE: Philco 90 1-47 Triode - by MrFixr55 - 06-25-2023, 09:06 PM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-25-2023, 09:07 PM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-25-2023, 09:11 PM

RE: Philco 90 1-47 Triode - by morzh - 06-25-2023, 09:31 PM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-25-2023, 09:33 PM

RE: Philco 90 1-47 Triode - by Radioroslyn - 06-25-2023, 09:45 PM

RE: Philco 90 1-47 Triode - by DaleHCook - 06-25-2023, 09:50 PM

RE: Philco 90 1-47 Triode - by Radioroslyn - 06-25-2023, 09:59 PM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-25-2023, 10:04 PM

RE: Philco 90 1-47 Triode - by MrFixr55 - 06-25-2023, 10:12 PM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-25-2023, 10:18 PM

RE: Philco 90 1-47 Triode - by MrFixr55 - 06-25-2023, 10:22 PM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-25-2023, 10:25 PM

RE: Philco 90 1-47 Triode - by Radioroslyn - 06-26-2023, 08:31 AM

RE: Philco 90 1-47 Triode - by MrFixr55 - 06-26-2023, 11:32 AM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-26-2023, 03:15 PM

RE: Philco 90 1-47 Triode - by morzh - 06-26-2023, 06:46 PM

RE: Philco 90 1-47 Triode - by MrFixr55 - 06-26-2023, 07:23 PM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-26-2023, 08:28 PM

RE: Philco 90 1-47 Triode - by GarySP - 06-26-2023, 08:59 PM

RE: Philco 90 1-47 Triode - by MrFixr55 - 06-26-2023, 09:16 PM

RE: Philco 90 1-47 Triode - by RodB - 06-26-2023, 11:08 PM

RE: Philco 90 1-47 Triode - by Radioroslyn - 06-27-2023, 07:26 AM

RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 08:35 AM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 10:18 AM

RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 10:51 AM

RE: Philco 90 1-47 Triode - by morzh - 06-27-2023, 11:02 AM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 11:05 AM

RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 11:06 AM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 11:30 AM

RE: Philco 90 1-47 Triode - by morzh - 06-27-2023, 11:34 AM

RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 11:42 AM

RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 11:44 AM

RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 11:54 AM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 12:03 PM

RE: Philco 90 1-47 Triode - by morzh - 06-27-2023, 12:10 PM

RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 01:07 PM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 01:11 PM

RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 01:22 PM

RE: Philco 90 1-47 Triode - by morzh - 06-27-2023, 01:23 PM

RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 01:27 PM

RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 01:34 PM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 01:34 PM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 01:37 PM

RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 01:39 PM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 01:53 PM

RE: Philco 90 1-47 Triode - by Radioroslyn - 06-27-2023, 02:07 PM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 02:13 PM

RE: Philco 90 1-47 Triode - by Radioroslyn - 06-27-2023, 02:42 PM

RE: Philco 90 1-47 Triode - by morzh - 06-27-2023, 02:43 PM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 08:10 PM

RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-28-2023, 07:07 AM

RE: Philco 90 1-47 Triode - by morzh - 06-28-2023, 10:33 AM

RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-28-2023, 10:44 AM

RE: Philco 90 1-47 Triode - by morzh - 06-28-2023, 12:55 PM

RE: Philco 90 1-47 Triode - by Mike_RF - 06-28-2023, 05:12 PM

RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-29-2023, 08:24 AM

RE: Philco 90 1-47 Triode - by MrFixr55 - 06-29-2023, 06:02 PM

RE: Philco 90 1-47 Triode - by Mike_RF - 12-21-2023, 11:40 PM

RE: Philco 90 1-47 Triode - by Radioroslyn - 12-22-2023, 12:34 AM

RE: Philco 90 1-47 Triode - by RodB - 12-22-2023, 10:50 AM

RE: Philco 90 1-47 Triode - by GarySP - 12-22-2023, 11:04 AM

RE: Philco 90 1-47 Triode - by Mike_RF - 12-22-2023, 11:08 AM

RE: Philco 90 1-47 Triode - by Mike_RF - 12-22-2023, 11:10 AM

RE: Philco 90 1-47 Triode - by morzh - 12-22-2023, 11:28 AM

RE: Philco 90 1-47 Triode - by Radioroslyn - 12-22-2023, 01:31 PM

RE: Philco 90 1-47 Triode - by Radioroslyn - 12-22-2023, 01:55 PM

RE: Philco 90 1-47 Triode - by RodB - 12-22-2023, 07:20 PM

RE: Philco 90 1-47 Triode - by Mike_RF - 12-24-2023, 06:35 PM

RE: Philco 90 1-47 Triode - by RodB - 12-24-2023, 09:56 PM

RE: Philco 90 1-47 Triode - by Radioroslyn - 12-24-2023, 11:32 PM

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