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

Help with the volume control - model 70
#4

Hi Ron and Terry

Thank you both for taking time to reply to my question.

I will switch the outer leads on the volume control and see what happens.

To answer the question from Ron, I purchased a kit from Mark Oppat which, I understand was put together for the express purpose of replacing the dual control.

It came with the two resistors which I mentioned and a single volume control. I do not know the resistance of the control and wondered what value it should have for this usage.

The chassis is in the radio at the moment and when I take it out I will measure its resistance and let you know.

Thank you again for your help.

Joseph

PS Mark did supply me with a circuit diagram showing the changes and it look like the new circuit calls for a 10 M (meg?) volume control.


Messages In This Thread
RE: Help with the volume control - model 70 - by doverite - 07-22-2013, 08:05 PM



Users browsing this thread: 6 Guest(s)
[-]
Recent Posts
Philco 60 Squealing
I just peaked it for the best signal at 600. NULL it for IF frequency, originally it would have been null for 500kh...Chas — 08:05 PM
Philco 60 Squealing
Wavetrap no longer matters.morzh — 05:19 PM
Philco 60 Squealing
Rod, I had checked out your suggestions but did not help. I did solder the ground rivets to the chassis as Chas suggeste...dconant — 04:52 PM
37-690 Bass Choke Replacement
Yeah, I know, Mouser and Digikey don't have "big iron" components. For some reason Philco was messing with the...Radiodial — 04:25 PM
37-690 Bass Choke Replacement
Yes, I just had to deal with that while repairing the 37-604 Philco. Exactly that value choke was gone. And the current ...morzh — 03:52 PM
37-690 Bass Choke Replacement
Ah, now where to find one. I've into this before on smaller sets, I now recall. Hammond makes one that is only rated...Radiodial — 03:27 PM
Philco 38-7 Speaker
Ask the admins to put them together. As for the renaming, while inside the thread, you simply press "New reply&quo...morzh — 02:23 PM
37-690 Bass Choke Replacement
This is the parts catalog. 32-7528 choke is 65H, 10mA, 2,250 Ohm inductance. Find a suitable one.morzh — 02:18 PM
37-690 Bass Choke Replacement
While troubleshooting the no bass amplification issue, I think I found the culprit. The choke #104 is reading 164K ohms....Radiodial — 01:42 PM
Philco 60 Squealing
Your IF transformers are tuned to the resonant frequency they were designed for. When you observe the bell curve they di...RodB — 01:35 PM

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

>