1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Linear Mode
Philco 37-60: Need to Revise Tone Control Design
whirligig
Junior Member
**
Posts: 38
Threads: 5
Joined: Feb 2017
City: manhattan beach, CA
#12

08-02-2019, 11:44 AM
I will have to revisit the tone control after I resolve the alignment issue. It looks like the broadcast band antenna transformer has an open in the primary. What is stumping me right now is that I still gets the broadcast band pretty well except for some motorboating at 600khz and below. Also the police/sw band is not fully aligned. Trimmer #7 is maxed out and I can't align 6 mhz to the dial.

Once all that is resolved, I  will have to redo the whole tone control circuit. I realized why the 0.22uf sounded good. It's in parallel/series with the other tone caps that are still in the circuit. They need to be all removed and then a single tone cap to the 100k pot is added.
Find
« Next Oldest | Next Newest »


Messages In This Thread
RE: Philco 37-60: Need to Revise Tone Control Design - by whirligig - 08-02-2019, 11:44 AM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
HiFi (Chifi) tube amp build - but my own design.
Tim, nice write up and thanks for sharing !! Sincerely Richardradiorich — 02:47 AM
HiFi (Chifi) tube amp build - but my own design.
Well, this was a real "Hum-Dinger" :lol: ! This will be kinda long, but hopefully it will help others having t...TV MAN — 01:55 AM
Shadow Meter Bulb
Phorum members, I am trying to find the bulb # for PHILCO Shadow Meter part number 45-2180 that is from a 37-640 chassis...georgetownjohn — 06:53 PM
Philco 41-608 changer coupler
3D-printing...short of machining, of course. Or molding.morzh — 05:20 PM
Philco 41-608 changer coupler
Thanks, Morzh. That solves the issue of the rubber pieces. Now, I need to find a way to replicate the pot metal piec...alangard — 05:07 PM
12' Philco
If it is 12', either Kareem or Andre would have to jump pretty high to look at the front panel. Kareem would have an e...morzh — 01:48 PM
12' Philco
And here's a story about the tires on the truck. Same "no-stoop" guy must have installed these! Take care a...GarySP — 01:17 PM
Hickok AC51 tube tester
I think they have only shown the secondaries of the transformer. Two of them feed the rectifiers' filaments.morzh — 12:58 PM
IF can wire size and Rubber mounts?
Arran If the wire inside cans is the gauges you mentioned, the sole reason for that would be mechanical, to stiffen t...morzh — 12:56 PM
12' Philco
Rod, Yes, I know, but the Giant Philco is not around anymore either, so I go by whoever was alive fairly recently. H...morzh — 12:54 PM

[-]
Who's Online
There are currently 4889 online users. [Complete List]
» 1 Member(s) | 4888 Guest(s)
Avatar

>
  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration