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 Model 41-296X with 41-285 modified chassis
#20

Hmmm...okay.

Do you have the schematic for this radio?

Locate part (58). This is the audio output transformer. See where the black wire and the white wire goes? Each of those wires go to the plate of a 41 tube. The schematic also gives the resistance measurements: 170 ohms and 190 ohms. 170 between one half of the winding and the center tap lead (black with white tracer), 190 between the other half and the center tap.

So if you measure between the two plates of the 41 tubes - in other words, between the black lead and the white lead - you should get in the neighborhood of 360 ohms.

Note there is no measurement given on the schematic of the right side of the winding - this is the secondary. You should measure only a few ohms on this winding.

Yes, those three wires do have little "bumps" or "berries" on them. All audio output transformer primary leads get that way in these 1939-42 Philcos. I don't know why.

Some time spent in learning the symbols of a schematic diagram will be a big help here. This link does not include symbols for tubes, but will get you started:
http://www.wisc-online.com/objects/index...ID=DCE1902

And here's another page, with tube symbols:
http://library.thinkquest.org/10784/circ...mbols.html
It's like learning to read a road map. A schematic diagram is sort of a road map of your radio; it shows how everything is connected.

Edit: Oh, yes, please DO replace that fried 160 volt cap with a new 450 volt cap!

--
Ron Ramirez
Ferdinand IN


Messages In This Thread
Re: Philco Model 41-296X with 41-285 modified chassis - by Ron Ramirez - 12-02-2009, 09:26 AM



Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
An attempt to remove the Field Coil from a G speaker
Milkjug plastic?morzh — 09:36 PM
An attempt to remove the Field Coil from a G speaker
Yep. 'Cause when I heard "buibble" I immediately thought of this and started wondering how this poly...morzh — 09:33 PM
An attempt to remove the Field Coil from a G speaker
Blister Pack, that's what I was trying to remember!RodB — 09:29 PM
An attempt to remove the Field Coil from a G speaker
In the packaging biz we refer to the package as a clamshell or blister pack if on a cardboard. So we are using the packa...Paul Philco322 — 08:13 PM
Philco 46-480 Electronic Restoration
It’s been too cold to solder in the garage the last couple of evenings, but it has allowed me more time to search for th...jrblasde — 07:23 PM
An attempt to remove the Field Coil from a G speaker
The part/tool you get from HD is inside the plastic, like in a bubble.RodB — 07:17 PM
An attempt to remove the Field Coil from a G speaker
Got it. Still did not get the "Bubble" part.morzh — 07:10 PM
An attempt to remove the Field Coil from a G speaker
No Mike. Clear plastic from the packaging of items you buy at Home Depot, the ones you can't open without a hack saw or ...RodB — 05:48 PM
Philco 89 indicator light.
Well thankfully that did not happen.Jim Dutridge — 05:21 PM
An attempt to remove the Field Coil from a G speaker
Paul, thanks, Anything can help. Gary Thanks, lemme look! PS. Looked it up. They have kits and parts for mod...morzh — 02:45 PM

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

>