Philco 90 1-47 Triode

Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed

Thread Rating:

0 Vote(s) - 0 Average
1
2
3
4
5

Linear Mode

Philco 90 1-47 Triode

Mike_RF
Junior Member

Posts: 34
Threads: 2
Joined: Jun 2023
City: Round Lake Centre ON CA State, Province, Country: Canada

06-25-2023, 09:07 PM

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!

(This post was last modified: 06-25-2023, 09:15 PM by Mike_RF.)

Find

« Next Oldest | Next Newest »

Thread Closed

Messages In This Thread

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

View a Printable Version

Users browsing this thread: 4 Guest(s)

Recent Posts
B&K 1077B no video
Hello Tim, I would if it's a leaky Capacitor So are all 3 of those B- voltages low then ? Sincerely Richardradiorich — 01:55 AM
B&K 1077B no video
I found a schematic and think I have the problem traced down to the minus power supply. I have very low voltages that go...TV MAN — 12:41 AM
RCA 15X
I'd try replacing the bulb first and if that doesn't do it, then change the 35Z5 and see if the problem goes away.NostalgiaRadioTime — 12:28 AM
B&K 1077B no video
Hello Tim, I have that exact unit in my shop too plus a Sencore unit there are times I like one or other !!. Sincerely...radiorich — 11:07 PM
RCA 15X
Everthing goes at once, maybe it's the cold weather, I have had 2 dial strings break and no my little RCA is having dial...Paul Philco322 — 10:26 PM
Philco 91 Schematic
Hi Dan, I can't explain this specific resistor but I have seen the use of a switch to apply B+ voltage to screen gri...RodB — 09:36 PM
6TPZ and 5TPO Radio Help
I suspect it's been repaired before. And I suspect whoever repaired it, wanted to re-use old transistors' pin stubs in o...morzh — 09:24 PM
B&K 1077B no video
Thanks Rich! I'll take a look and see what he has. I know there's more modern equipment to be had, but this one I know a...TV MAN — 09:11 PM
B&K 1077B no video
Hello Tim, Here is a link to restoration of one on Phil's old radios site ! Sincerely Richard bk1077bradiorich — 09:01 PM
6TPZ and 5TPO Radio Help
I'm a little befuddled on this one. Should X5 and X4 be tied together like this? It looks like someone added this at so...R3Sons — 07:33 PM

Who's Online
There are currently no members online.

Login
Username:
Password:	Lost Password?
	Remember me