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

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

Philco 42-390, code 121 speaker
#5

>>A closer examination of the very small print schematic indicates that the speaker is a PM type.


http://www.nostalgiaair.org/PagesByModel...013535.pdf

This shows a Field Coil time, not a PM.

>> If I cannot locate an original speaker, I will wind a FC for 1100 ohms.

I do not understand. What field coil are you talking about, if your speaker is a PM one, and you do not have the original?


As for the ratio, seems reasonable. Class AB load is 12K, so 16K is plausible. Your transformer then should convert 1.25 Ohm into 16K.

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.


Messages In This Thread
Philco 42-390, code 121 speaker - by Stevelog - 11-20-2024, 12:07 PM
RE: Philco 42-390, code 121 speaker - by GarySP - 11-20-2024, 06:24 PM
RE: Philco 42-390, code 121 speaker - by Stevelog - 11-20-2024, 07:21 PM
RE: Philco 42-390, code 121 speaker - by Stevelog - 11-26-2024, 02:57 PM
RE: Philco 42-390, code 121 speaker - by morzh - 11-26-2024, 05:18 PM
RE: Philco 42-390, code 121 speaker - by Stevelog - 11-26-2024, 06:39 PM
RE: Philco 42-390, code 121 speaker - by morzh - 11-26-2024, 08:38 PM



Users browsing this thread: 2 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.

>