Philco 645 Hum-m-m-m

Thread Rating:

0 Vote(s) - 0 Average
1
2
3
4
5

Linear Mode

Philco 645 Hum-m-m-m

Steve Davis
Phorum Expert

Posts: 1,402
Threads: 70
Joined: Oct 2007
City: Linn Creek, MO

#13

04-12-2014, 11:36 AM

You don't want to go up too much on 59 or you will stress the rectifier. But go ahead and increase 58 some.

Have you replaced all the capacitors? Capacitors 50, 51, and 62 could cause a low voltage on the plat of the 85 tube. Also check the value of resisters 48 and 49.

Steve

M R Radios C M Tubes

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 Yet Another Question - by Winky Dink - 07-05-2014, 11:04 PM

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

View a Printable Version

Users browsing this thread: 5 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.

Login
Username:
Password:	Lost Password?
	Remember me