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 magnetic cart help
#5

Morzh, it does look like there are two coils. 

One coil is the actual moving coil and the second is probably a hum cancelling coil. They are connected in series with the center common connection going to ground. So there are only three external connections. 

The question is how to phase the two windings for the desired hum cancellation?

There is a detail of the pickup windings and connections to the associated impedance matching transformer on page 17 of the schematic here:

http://www.nostalgiaair.org/pagesbymodel...013623.pdf


Messages In This Thread
Philco magnetic cart help - by OldRestorer - 03-01-2017, 10:53 AM
RE: Philco magnetic cart help - by morzh - 03-01-2017, 11:04 AM
RE: Philco magnetic cart help - by OldRestorer - 03-01-2017, 12:53 PM
RE: Philco magnetic cart help - by morzh - 03-01-2017, 03:25 PM
RE: Philco magnetic cart help - by Mondial - 03-01-2017, 04:15 PM
RE: Philco magnetic cart help - by morzh - 03-01-2017, 05:42 PM
RE: Philco magnetic cart help - by Mondial - 03-01-2017, 06:14 PM
RE: Philco magnetic cart help - by OldRestorer - 03-01-2017, 09:56 PM
RE: Philco magnetic cart help - by morzh - 03-01-2017, 09:56 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Zenith H725
I completed the insulation on the cabinet interior (Al foil and hi temp silicone rubber), and reglued the speaker gasket...EdHolland — 06:18 PM
HiFi (Chifi) tube amp build - but my own design.
Tim - Photos of 8 octal tube sockets. (Top and bottom) Send me a PM if you're interested.RodB — 04:11 PM
VTVM meter moves when my hand is next to it & not on
Haha! I hope so. It seemed rather lost and forgotten languishing in the frozen Northeast of England.EdHolland — 02:36 PM
VTVM meter moves when my hand is next to it & not on
Ed - it's in the Cayman's enjoying the good life.RodB — 02:14 PM
VTVM meter moves when my hand is next to it & not on
Static electricity - but the other chaps beat me to it again. I've seen this before with analogue meters. I've also ...EdHolland — 01:56 PM
Need to purchase some accessories for restoration of my Old Philco Radio
Hi Paulo, Welcome to the Philco Phorum. I can see why you want to find good reproduction parts. That is a bea...MrFixr55 — 11:10 PM
HiFi (Chifi) tube amp build - but my own design.
Tim, I have some bakelite sockets in my work shop that I can dig up. I believe quite a few are NOS. I will take photo...RodB — 10:03 PM
Philco 610B oscillator wiring
> The cathode as noted is wired directly to the ground side of the heater filament for that tube, not to the #17 and ...Radioroslyn — 08:12 PM
HiFi (Chifi) tube amp build - but my own design.
Tim; I noticed your post a little late, but I would take one of the junk sockets and try to break a chunk out of it wi...Arran — 08:07 PM
Need to purchase some accessories for restoration of my Old Philco Radio
Here is a list of resources found in our online library that you might find useful. Mike's Gobs of Knobs email addres...klondike98 — 01:46 PM

[-]
Who's Online
There are currently no members online.

>