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 645 Hum-m-m-m
TA Forbes
Deviate Emeritus
*****
Posts: 2,353
Threads: 92
Joined: May 2010
City: Clayton, NC
#15

04-12-2014, 12:04 PM
It may be that at some point in the 645's history it had a component failure that "stressed" the power transformer. An increase of the filter capacitor values is a valid way to fix this.

Keep an eye on the power transformer. Make sure it is not getting to hot.
Find
« Next Oldest | Next Newest »


Messages In This Thread
Philco 645 Hum-m-m-m - by Winky Dink - 04-07-2014, 08:21 PM
RE: Philco 645 Hum-m-m-m - by gregb - 04-07-2014, 08:24 PM
RE: Philco 645 Hum-m-m-m - by Warren - 04-07-2014, 09:05 PM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-07-2014, 09:23 PM
RE: Philco 645 Hum-m-m-m - by Ron Ramirez - 04-08-2014, 05:31 AM
RE: Philco 645 Hum-m-m-m - by morzh - 04-08-2014, 10:10 AM
RE: Philco 645 Hum-m-m-m - by PAradiogeek - 04-08-2014, 11:16 AM
RE: Philco 645 Hum-m-m-m - by TA Forbes - 04-08-2014, 01:26 PM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-09-2014, 12:54 AM
RE: Philco 645 Hum-m-m-m - by TA Forbes - 04-09-2014, 10:58 AM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-09-2014, 01:45 PM
RE: Philco 645 Hum-m-m Fixed? - by Winky Dink - 04-12-2014, 10:43 AM
RE: Philco 645 Hum-m-m-m - by Steve Davis - 04-12-2014, 11:36 AM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-12-2014, 11:57 AM
RE: Philco 645 Hum-m-m-m - by TA Forbes - 04-12-2014, 12:04 PM
RE: Philco 645 Hum-m-m-m - by BrendaAnnD - 04-12-2014, 04:18 PM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-13-2014, 05:14 AM
RE: Philco 645 Hum-m-m-m - by morzh - 04-13-2014, 09:28 PM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-14-2014, 01:29 AM
RE: Philco 645 Hum-m-m-m - by morzh - 04-14-2014, 08:23 PM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-16-2014, 04:28 AM
RE: Philco 645 Hum-m-m-m - by morzh - 04-16-2014, 10:30 AM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-16-2014, 04:24 PM
RE: Philco 645 Hum-m-m-m - by TA Forbes - 04-16-2014, 04:43 PM
RE: Philco 645 Hum-m-m-m - by morzh - 04-16-2014, 05:05 PM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-17-2014, 04:54 AM
RE: Philco 645 Hum-m-m-m - by morzh - 04-17-2014, 08:54 AM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-18-2014, 01:08 AM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 07-02-2014, 11:20 PM
RE: Philco 645 Hum-m-m-m - by Arran - 07-03-2014, 12:21 AM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 07-03-2014, 01:53 AM
RE: Philco 645 Hum-m-m-m - by morzh - 07-03-2014, 09:45 AM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 07-04-2014, 12:37 AM
RE: Philco 645 Hum-m-m-m - by morzh - 07-05-2014, 11:09 PM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 07-06-2014, 01:57 AM
RE: Philco 645 Hum-m-m-m - by morzh - 07-06-2014, 08:58 AM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 07-06-2014, 09:30 AM
RE: Philco 645 Hum-m-m-m - by morzh - 07-06-2014, 10:16 AM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 07-07-2014, 08:04 PM



Users browsing this thread: 6 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 no members online.

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