37-650 buzzing

Thread Rating:

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

Linear Mode

37-650 buzzing

Ron Ramirez
Silent Key

Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand State, Province, Country: Indiana

#14

01-27-2011, 08:00 PM

Another thing to check for that I forgot to mention: poor ground connections. Philco often connected wires to chassis ground through a riveted connection, and corrosion can build up in the chassis hole where the rivet is. You may not see the corrosion but it is there, making ground connections go intermittent or bad altogether.

By the schematic, you should measure 138 ohms across resistor 58 (between B- and ground). If you are reading 143 ohms (not 0.143 ohm), that is close enough.

You should not read more than 138 (143?) ohms across electrolytic 59...the resistance of resistor 58.

--
Ron Ramirez
Ferdinand IN

Find

« Next Oldest | Next Newest »

Messages In This Thread

37-650 buzzing - by wil - 01-23-2011, 11:15 AM

Re: 37-650 buzzing - by Ron Ramirez - 01-23-2011, 09:07 PM

Re: 37-650 buzzing - by wil - 01-24-2011, 12:14 PM

Re: 37-650 buzzing - by Ron Ramirez - 01-24-2011, 04:21 PM

Re: 37-650 buzzing - by philcoradio1234 - 01-24-2011, 06:32 PM

Re: 37-650 buzzing - by Ron Ramirez - 01-24-2011, 07:03 PM

Re: 37-650 buzzing - by wil - 01-25-2011, 10:04 AM

Re: 37-650 buzzing - by Ron Ramirez - 01-25-2011, 10:24 AM

Re: 37-650 buzzing - by wil - 01-25-2011, 04:08 PM

Re: 37-650 buzzing - by Ron Ramirez - 01-25-2011, 04:20 PM

Re: 37-650 buzzing - by wil - 01-26-2011, 02:16 PM

Re: 37-650 buzzing - by Ron Ramirez - 01-26-2011, 06:46 PM

Re: 37-650 buzzing - by wil - 01-27-2011, 05:56 PM

Re: 37-650 buzzing - by Ron Ramirez - 01-27-2011, 08:00 PM

Re: 37-650 buzzing - by wil - 02-03-2011, 03:14 PM

Re: 37-650 buzzing - by Ron Ramirez - 02-03-2011, 07:06 PM

Re: 37-650 buzzing - by wil - 02-05-2011, 12:05 PM

Re: 37-650 buzzing - by Ron Ramirez - 02-06-2011, 12:42 AM

View a Printable Version

Users browsing this thread: 1 Guest(s)

Recent Posts
Philco 89B code 123 newbie
Hello Kurt, Welcome aboard and you have a nice set to start on ! Yes, the bakelite blocks and I too find them fairly...radiorich — 07:12 AM
Philco 89B code 123 newbie
Getting started on my first Philco here, done some research and hopefully I now know enough to be dangerous. :) Overal...Kurt P — 01:44 AM
Delco car radio Peko vibrator converstion issues
Richard, I reviewed the Panasonic specification sheets for this type capacitor and though dV/dt is discussed, there a...Chas — 11:48 AM
Philco Shipping Crate
I picked up a nice set of KLH 20 speakers ca 1980, for $40, and a Telefunken 5083W "Allegro" AM FM SW radio, a...MrFixr55 — 10:52 AM
Philco Model 71B
Absolutely looking at replacing the arch veneer and sides. Good luck stripping the front face ... hope the paint hasn't...GarySP — 10:31 AM
1953 Music Masters 620-9 Australian Radio Restore
That's a very interesting radio Buzz. Looking forward to more installments on this one!Eliot Ness — 10:31 AM
Philco Model 71B
OOPs, Dumb me. The title of the post is Model 71B. DUH!! Yes, the 71 uses an autodyne detector, but it is more like t...MrFixr55 — 10:21 AM
Philco Model 71B
Give us a pic or two of the back and such to make a better assessment of it. So far I'm kinda liking it as it but the s...Radioroslyn — 10:02 AM
Delco car radio Peko vibrator converstion issues
Is the can somehow grounded?morzh — 07:04 AM
Philco Shipping Crate
??? what?morzh — 07:03 AM

Who's Online

There are currently 2154 online users. [Complete List]
» 1 Member(s) | 2153 Guest(s)

Login
Username:
Password:	Lost Password?
	Remember me