Replaced the capacitors but all I get is a hum

Thread Rating:

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

Linear Mode

Replaced the capacitors but all I get is a hum

Mondial
Phorum Expert

Posts: 1,114
Threads: 14
Joined: Feb 2013
City: Irvington, NY

#50

11-12-2013, 06:52 PM

Morzh, you still can get a hum because of the pulsating DC flowing through the field coil. The resultant varying magnetic field induces a voltage in the voice coil which causes it to move.

Same concept as an AC induction motor

Find

« Next Oldest | Next Newest »

Messages In This Thread

Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-01-2013, 09:17 PM

RE: Replaced the capacitors but all I get is a hum - by Warren - 11-01-2013, 11:56 PM

RE: Replaced the capacitors but all I get is a hum - by morzh - 11-02-2013, 11:20 AM

RE: Replaced the capacitors but all I get is a hum - by klondike98 - 11-02-2013, 05:38 PM

RE: Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-02-2013, 07:18 PM

RE: Replaced the capacitors but all I get is a hum - by jerryhawthorne - 11-02-2013, 08:36 PM

RE: Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-02-2013, 09:27 PM

RE: Replaced the capacitors but all I get is a hum - by Ron Ramirez - 11-02-2013, 09:38 PM

RE: Replaced the capacitors but all I get is a hum - by Warren - 11-02-2013, 10:07 PM

RE: Replaced the capacitors but all I get is a hum - by klondike98 - 11-02-2013, 10:33 PM

RE: Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-02-2013, 10:40 PM

RE: Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-02-2013, 10:43 PM

RE: Replaced the capacitors but all I get is a hum - by morzh - 11-02-2013, 10:52 PM

RE: Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-02-2013, 11:11 PM

RE: Replaced the capacitors but all I get is a hum - by klondike98 - 11-02-2013, 11:32 PM

RE: Replaced the capacitors but all I get is a hum - by jerryhawthorne - 11-03-2013, 02:21 AM

RE: Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-03-2013, 10:27 AM

RE: Replaced the capacitors but all I get is a hum - by Radioroslyn - 11-03-2013, 11:12 AM

RE: Replaced the capacitors but all I get is a hum - by Mondial - 11-03-2013, 11:46 AM

RE: Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-03-2013, 12:27 PM

RE: Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-03-2013, 01:24 PM

RE: Replaced the capacitors but all I get is a hum - by morzh - 11-03-2013, 02:51 PM

RE: Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-03-2013, 07:32 PM

RE: Replaced the capacitors but all I get is a hum - by morzh - 11-03-2013, 10:25 PM

RE: Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-03-2013, 10:57 PM

RE: Replaced the capacitors but all I get is a hum - by Warren - 11-04-2013, 02:42 PM

RE: Replaced the capacitors but all I get is a hum - by morzh - 11-04-2013, 08:41 PM

RE: Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-06-2013, 07:27 PM

RE: Replaced the capacitors but all I get is a hum - by jerryhawthorne - 11-06-2013, 07:40 PM

RE: Replaced the capacitors but all I get is a hum - by morzh - 11-06-2013, 10:07 PM

RE: Replaced the capacitors but all I get is a hum - by klondike98 - 11-06-2013, 10:25 PM

RE: Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-06-2013, 10:39 PM

RE: Replaced the capacitors but all I get is a hum - by BrendaAnnD - 11-06-2013, 11:18 PM

RE: Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-07-2013, 08:10 PM

RE: Replaced the capacitors but all I get is a hum - by jerryhawthorne - 11-07-2013, 09:55 PM

RE: Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-07-2013, 10:27 PM

RE: Replaced the capacitors but all I get is a hum - by morzh - 11-07-2013, 10:49 PM

RE: Replaced the capacitors but all I get is a hum - by BrendaAnnD - 11-07-2013, 11:07 PM

RE: Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-07-2013, 11:47 PM

RE: Replaced the capacitors but all I get is a hum - by morzh - 11-08-2013, 10:18 AM

RE: Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-08-2013, 11:14 PM

RE: Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-08-2013, 11:29 PM

RE: Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-10-2013, 01:23 AM

RE: Replaced the capacitors but all I get is a hum - by BrendaAnnD - 11-10-2013, 02:17 AM

RE: Replaced the capacitors but all I get is a hum - by Andrew Fleck - 11-12-2013, 03:44 PM

RE: Replaced the capacitors but all I get is a hum - by BrendaAnnD - 11-12-2013, 03:56 PM

RE: Replaced the capacitors but all I get is a hum - by jerryhawthorne - 11-12-2013, 04:18 PM

RE: Replaced the capacitors but all I get is a hum - by cwirth - 11-12-2013, 06:00 PM

RE: Replaced the capacitors but all I get is a hum - by morzh - 11-12-2013, 06:31 PM

RE: Replaced the capacitors but all I get is a hum - by Mondial - 11-12-2013, 06:52 PM

RE: Replaced the capacitors but all I get is a hum - by BrendaAnnD - 11-12-2013, 07:30 PM

RE: Replaced the capacitors but all I get is a hum - by morzh - 11-12-2013, 10:11 PM

RE: Replaced the capacitors but all I get is a hum - by BrendaAnnD - 11-12-2013, 10:50 PM

RE: Replaced the capacitors but all I get is a hum - by TV MAN - 01-09-2014, 12:35 PM

RE: Replaced the capacitors but all I get is a hum - by codefox1 - 01-09-2014, 10:53 PM

View a Printable Version

Users browsing this thread: 10 Guest(s)

Recent Posts
38-10T chassis Restoration begins
Thanks for the info guys. I always wondered why the use of mica. Now I know.dconant — 01:52 PM
38-10T chassis Restoration begins
Most common plastics have a dielectric constant in the 3-4 range whereas mica is around 6. This means that even if you w...Steve D — 01:46 PM
38-10T chassis Restoration begins
It is acceptable but not desirable. Plastic is not an approved cap dielectric, and even though a reasonably thick piece...morzh — 11:52 AM
38-10T chassis Restoration begins
I have a question about the mica sheets. I thought I saw somewhere on the Phorum where someone used thin plastic report ...dconant — 10:44 AM
38-10T chassis Restoration begins
Yes, you should carefully remove the mica sheets from the trimmers otherwise you risk trapping foreign material in the t...RodB — 10:34 AM
American Bosch Model 802 auto radio
Hi Joe, Thank you again. The American Bosch Model 634A has the same tube lineup as my Model 802 and the parts layout dia...Antipodal — 03:09 AM
38-10T chassis Restoration begins
hello everyone, I know it has been a while since I have posted about this radio but finally got chance work on it . I ...radiorich — 02:45 AM
Rusty Tuning Condenser
You could soak the fins in vinegar. You have to be careful if any pot metal is involved because the vinegar will dissolv...RodB — 09:20 PM
Rusty Tuning Condenser
Hello, I have a Philco 91 where the tuning condenser fins are rusty. I magnet sticks to them so they can't be aluminium....dconant — 05:50 PM
American Bosch Model 802 auto radio
I’ve found six United Bosch auto radio’s with the same 6-tube line-up as the 802, on NostalgiaAir. They are models 150, ...Joe Rossi — 02:52 PM

Who's Online

There are currently 3883 online users. [Complete List]
» 4 Member(s) | 3879 Guest(s)

Login
Username:
Password:	Lost Password?
	Remember me