Restored Philco 46-420 code 121 has slight low pitch hum.

Thread Rating:

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

Linear Mode

Restored Philco 46-420 code 121 has slight low pitch hum.

terrylett
Member

Posts: 61
Threads: 7
Joined: Aug 2018
City: Mason State, Province, Country: OH

03-17-2019, 08:18 PM

OK so are we talking about an electrolytic capacitor? 20 or 30 mfd sounds like a third electrolytic.

The 2 existing 20 mfd electrolytics are currently connected to pins 4 and 8 (+ end) and the - end to B+.

I will give it a try but I want to make sure I'm going to do your suggestion correctly.

Thanks.

Find

« Next Oldest | Next Newest »

Messages In This Thread

Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-17-2019, 06:24 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by Radioroslyn - 03-17-2019, 08:06 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-17-2019, 08:18 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by Radioroslyn - 03-17-2019, 08:39 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-17-2019, 08:50 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-17-2019, 09:01 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by Radioroslyn - 03-17-2019, 10:22 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-17-2019, 10:31 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by Radioroslyn - 03-18-2019, 12:19 AM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-18-2019, 10:16 AM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by morzh - 03-18-2019, 10:36 AM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-18-2019, 10:42 AM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by Radioroslyn - 03-18-2019, 11:34 AM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-18-2019, 11:46 AM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by Radioroslyn - 03-18-2019, 03:34 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by OZ4 - 03-18-2019, 10:41 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by Jake Blake - 03-19-2019, 08:25 AM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-19-2019, 11:43 AM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by morzh - 03-19-2019, 01:16 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-19-2019, 03:19 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by morzh - 03-19-2019, 03:27 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by morzh - 03-19-2019, 03:32 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-19-2019, 04:32 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by morzh - 03-19-2019, 05:12 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by terrylett - 03-19-2019, 11:14 PM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by Arran - 03-20-2019, 01:09 AM

RE: Restored Philco 46-420 code 121 has slight low pitch hum. - by morzh - 03-20-2019, 08:41 AM

View a Printable Version

Users browsing this thread: 3 Guest(s)

Recent Posts
HiFi (Chifi) tube amp build - but my own design.
And so does a barber shop quartet. mmmmmmRodB — 03:54 PM
Shadow Meter Bulb
I did try an LED bulb in place of the original but wasn't impressed with the amount of light on the dial. Seems like it ...RodB — 03:51 PM
HiFi (Chifi) tube amp build - but my own design.
Tim Would mounting he transformer vertically change the hum, if used without additional parts? Also, in these amps...morzh — 02:25 PM
Shadow Meter Bulb
Gary I doubt it would introduce any noise. We use similar lamps for the panel indication, 12V AC lamps: they are LEDs...morzh — 02:15 PM
Shadow Meter Bulb
Not sure if anyone has tried this but there are 6.3 volt miniature lamps in bayonet and screw-in base options available ...GarySP — 11:31 AM
Shadow Meter Bulb
Any 6.3 volt pilot light will work. I would use the brightest one I could find in my workroom. Be sure the dial is clean...RodB — 10:45 AM
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

Who's Online

There are currently 7862 online users. [Complete List]
» 3 Member(s) | 7859 Guest(s)

Login
Username:
Password:	Lost Password?
	Remember me