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

Philco or Philco-Ford stereos
#6

The "center bass channel" was the in thing just prior to MPX stereo FM.  Most(if not all) used a PP output transformer for punch that combined R&L channels into one for center. On combo AM/FM was also common to see selector position that one channel was fed AM, the other FM. A few stations transmitted R & L channels separately on the different bands. Short lived as it was useless after FCC approved FM MPX in late '61.

I had a small 1960-ish(I believe J-whatever model) Philco amp with center channel I got from a old friend. Used a pair of 6AQ5, feeding R&L output transformers in series with center channel. Kind of a cheezy setup, I removed the separate transformers as R&L had all the punch of the common AA5. After removing the high freq rolloff cap. It was fair as a single channel PP amp, used it briefly as a driver for a plate modulated transmitter.

Tom


Messages In This Thread
Philco or Philco-Ford stereos - by Jayce - 06-17-2018, 02:24 PM
RE: Philco or Philco-Ford stereos - by Jayce - 06-17-2018, 05:09 PM
RE: Philco or Philco-Ford stereos - by morzh - 06-17-2018, 07:53 PM
RE: Philco or Philco-Ford stereos - by Arran - 06-20-2018, 03:24 AM
RE: Philco or Philco-Ford stereos - by 35Z5 - 06-20-2018, 10:27 AM
RE: Philco or Philco-Ford stereos - by Jayce - 06-20-2018, 11:46 AM
RE: Philco or Philco-Ford stereos - by Jayce - 06-20-2018, 03:20 PM
RE: Philco or Philco-Ford stereos - by Arran - 06-22-2018, 05:24 AM
RE: Philco or Philco-Ford stereos - by 35Z5 - 06-22-2018, 11:28 AM



Users browsing this thread: 3 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.

>