Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Philco 90 1-47 Triode
#7

Hi - Thanks for the response.

The speaker frame, voice coil and field coils are exactly the same between the single ended and the push pull. 

The only thing that is different is the output transformer. The push pull has an impedance of 550 ohms while the single end is 450.

So, since the speaker, voice coil and field coils are identical, I am proposing that I simply remove the push pull transformer and install the single ended transformer.

Im just checking it out with the folks in the know before i proceed. 

Cheers


Attached Files Image(s)
   

Current Restorations In Process
RME DB22A - Lafayette KT200 - Hammerlund HQ 140 XA
Johnson Viking II - Viking VFO 122 - Johnson Ranger
Philco Model 90 Low Boy

I got stuff.... and things.... and I never said I could spell!


Messages In This Thread
Philco 90 1-47 Triode - by Mike_RF - 06-25-2023, 04:02 PM
RE: Philco 90 1-47 Triode - by morzh - 06-25-2023, 06:10 PM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-25-2023, 06:18 PM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-25-2023, 07:28 PM
RE: Philco 90 1-47 Triode - by Radioroslyn - 06-25-2023, 07:43 PM
RE: Philco 90 1-47 Triode - by MrFixr55 - 06-25-2023, 08:06 PM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-25-2023, 08:07 PM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-25-2023, 08:11 PM
RE: Philco 90 1-47 Triode - by morzh - 06-25-2023, 08:31 PM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-25-2023, 08:33 PM
RE: Philco 90 1-47 Triode - by Radioroslyn - 06-25-2023, 08:45 PM
RE: Philco 90 1-47 Triode - by DaleHCook - 06-25-2023, 08:50 PM
RE: Philco 90 1-47 Triode - by Radioroslyn - 06-25-2023, 08:59 PM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-25-2023, 09:04 PM
RE: Philco 90 1-47 Triode - by MrFixr55 - 06-25-2023, 09:12 PM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-25-2023, 09:18 PM
RE: Philco 90 1-47 Triode - by MrFixr55 - 06-25-2023, 09:22 PM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-25-2023, 09:25 PM
RE: Philco 90 1-47 Triode - by Radioroslyn - 06-26-2023, 07:31 AM
RE: Philco 90 1-47 Triode - by MrFixr55 - 06-26-2023, 10:32 AM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-26-2023, 02:15 PM
RE: Philco 90 1-47 Triode - by morzh - 06-26-2023, 05:46 PM
RE: Philco 90 1-47 Triode - by MrFixr55 - 06-26-2023, 06:23 PM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-26-2023, 07:28 PM
RE: Philco 90 1-47 Triode - by GarySP - 06-26-2023, 07:59 PM
RE: Philco 90 1-47 Triode - by MrFixr55 - 06-26-2023, 08:16 PM
RE: Philco 90 1-47 Triode - by RodB - 06-26-2023, 10:08 PM
RE: Philco 90 1-47 Triode - by Radioroslyn - 06-27-2023, 06:26 AM
RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 07:35 AM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 09:18 AM
RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 09:51 AM
RE: Philco 90 1-47 Triode - by morzh - 06-27-2023, 10:02 AM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 10:05 AM
RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 10:06 AM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 10:30 AM
RE: Philco 90 1-47 Triode - by morzh - 06-27-2023, 10:34 AM
RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 10:42 AM
RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 10:44 AM
RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 10:54 AM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 11:03 AM
RE: Philco 90 1-47 Triode - by morzh - 06-27-2023, 11:10 AM
RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 12:07 PM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 12:11 PM
RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 12:22 PM
RE: Philco 90 1-47 Triode - by morzh - 06-27-2023, 12:23 PM
RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 12:27 PM
RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 12:34 PM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 12:34 PM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 12:37 PM
RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-27-2023, 12:39 PM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 12:53 PM
RE: Philco 90 1-47 Triode - by Radioroslyn - 06-27-2023, 01:07 PM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 01:13 PM
RE: Philco 90 1-47 Triode - by Radioroslyn - 06-27-2023, 01:42 PM
RE: Philco 90 1-47 Triode - by morzh - 06-27-2023, 01:43 PM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-27-2023, 07:10 PM
RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-28-2023, 06:07 AM
RE: Philco 90 1-47 Triode - by morzh - 06-28-2023, 09:33 AM
RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-28-2023, 09:44 AM
RE: Philco 90 1-47 Triode - by morzh - 06-28-2023, 11:55 AM
RE: Philco 90 1-47 Triode - by Mike_RF - 06-28-2023, 04:12 PM
RE: Philco 90 1-47 Triode - by Ron Ramirez - 06-29-2023, 07:24 AM
RE: Philco 90 1-47 Triode - by MrFixr55 - 06-29-2023, 05:02 PM
RE: Philco 90 1-47 Triode - by Mike_RF - 12-21-2023, 10:40 PM
RE: Philco 90 1-47 Triode - by Radioroslyn - 12-21-2023, 11:34 PM
RE: Philco 90 1-47 Triode - by RodB - 12-22-2023, 09:50 AM
RE: Philco 90 1-47 Triode - by GarySP - 12-22-2023, 10:04 AM
RE: Philco 90 1-47 Triode - by Mike_RF - 12-22-2023, 10:08 AM
RE: Philco 90 1-47 Triode - by Mike_RF - 12-22-2023, 10:10 AM
RE: Philco 90 1-47 Triode - by morzh - 12-22-2023, 10:28 AM
RE: Philco 90 1-47 Triode - by Radioroslyn - 12-22-2023, 12:31 PM
RE: Philco 90 1-47 Triode - by Radioroslyn - 12-22-2023, 12:55 PM
RE: Philco 90 1-47 Triode - by RodB - 12-22-2023, 06:20 PM
RE: Philco 90 1-47 Triode - by Mike_RF - 12-24-2023, 05:35 PM
RE: Philco 90 1-47 Triode - by RodB - 12-24-2023, 08:56 PM
RE: Philco 90 1-47 Triode - by Radioroslyn - 12-24-2023, 10:32 PM



Users browsing this thread: 2 Guest(s)