The PHILCO Phorum

I am in need of the schematic for a PHILCO  model 60 chassis type 366A.
code 121.
    
 From what I can tell it is a  July 1934 model
 I don't think it is a Canadian model , but I don't know for sure.
   I do know there were about five changes to this model, and I would like to have the right
schematic.
 Dan in Calgary

[attachment=19616]
Will try and post a picture of the only thing in Beitman hope it helps. David

Got a pic of the underside of the chassis? It would appear that in might be a model 66 chassis (366). The 60 and 66 use the same tube layout but are electrically pretty different.

[attachment=19617]
Beitman model 66

Thanks for the replies.
As I understand it  resistor#44 and cap #43 were not in the later models.
     I took out an electrolytic  cap to restuff it and I see the other one has two places to connect to  AND  a ground connection.   [ see the red dot and the silver one , in the photo]
   Hopefully I can figure it out with the right paperwork.
    Someone has been in there messing around. that is a good reason the get the right schematic.
 Philco radios have so many different schematics and models for the same radio.
     Thank you all for the input as you guys are the Philco experts.
 Dan in calgary

That's a 66 chassis. The 60 doesn't have the terminal board and the 66 has a more desirable sw coverage.
The chassis # indicates 3 Canadian 66 Model and A 5o cycle power transformer.

The filter condenser #50 connected as follows the + side of each the connect to each of the terminal  on the bottom. The two - wires connected the shell of the condenser. These are NOT grounded as the original set up there is a cardboard sleeve that fits over the end of the shell and a metal  tab that slips between the shell and the cardboard insulator. This tab connects back to the hv center tap.

Looks like there is a connection missing on the schematic. Should be a dot at the intersection of the bottom of 28 and the HV rail (line that goes over to the field coil and the screen grid of the 42). Without it there is no HV on the 2nd half of 50 and 28 (plate voltage for the 75).

GL

Thank you very much for the information.
  I will be getting at this one in a while, after I look at the schematic  and figure it out.

  Email sent to  Radioroslyn
 Dan in Calgary

No problem I'm usually around. I did a 66 maybe a yr or so ago. Here are the before a after of the chassis.

Thanks;
In your photo you posted it shows two electrolytic cans.. Did the can on the right have two positive terminals
 and a negative [that was not grounded]?
    Did the left can have one positive terminal on it, and the can was ground?
 It seems that someone who messed with this radio of mine, has added another filter cap somehow. At lease it seems like that to me [so far]
 I do appreciate the help on this, but sometimes I  get me frustrated ,and I need help,
 as I am self taught ,in this area.
 Thanks  Dan

If you take a quick gander it the schematic #49 (the can w one terminal ) the - side is grounded. But the can w/2 terminals #50 each terminal has the + side of 2 8uf 450v condensers to them. Both - connect to the shell which in turn connects the hv center tap. This how the -bias voltage is filtered which supplies the control grid of the 42 and 75 tubes. If you ground it there will be no bias voltage. Your 42 tube won't like you anymore and will probably produce some hum.

I guess I should answer your question more directly that would be yes and yes.

Thank you very much. I am going to get working on the radio a little later in the week and I think I have most of it figured out, thanks to your help. I will let you know if I need any more assistance with this radio.
 Dan

Dan, the 66 schematic has a missing connection dot that caused me some confusion. See the discussion on this thread: https://www.philcoradio.com/phorum/showt...#pid146845 which starts at post #25 and continues for a few after that. Hope that helps more than it confuses.

Now  that I have the proper schematic, I have already restuffed  the #49 cap.
 The problem is : I stuffed it with a 10MF @500, and it calls for a 6MF
        I know I could have used  a 8MF , but is a 10 too much?
 Dan

No your fine.