No RF on 89

Thread Rating:

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

Linear Mode

No RF on 89

Steve Davis
Phorum Expert

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

#13

12-20-2020, 10:52 AM

Patrick, the first thing to try is lowering the resistance of the cathode resistor. It will not hurt to go down to 7500 ohm. It could be the coil form has absorbed some moisture. Remove the coil from the radio and bake it @ 200 degrees fore about a half hour. Occasionally we come across a chassis that just will not respond to all the normal "tricks". In that case, Ron has worked out a fix that is guaranteed to take care of the problem. Take a look here Converting the Oscillator Circuit - Models 19, 71, 89, 91 (philcoradio.com) [url=https://philcoradio.com/phorum/showthread.php?tid=14919][/url]

Steve

M R Radios C M Tubes

Find

« Next Oldest | Next Newest »

Messages In This Thread

No RF on 89 - by Patrick - 12-18-2020, 11:44 AM

RE: No RF on 89 - by RodB - 12-18-2020, 12:10 PM

RE: No RF on 89 - by Patrick - 12-18-2020, 12:52 PM

RE: No RF on 89 - by RodB - 12-18-2020, 01:07 PM

RE: No RF on 89 - by Patrick - 12-18-2020, 01:28 PM

RE: No RF on 89 - by Patrick - 12-18-2020, 01:42 PM

RE: No RF on 89 - by Radioroslyn - 12-18-2020, 06:39 PM

RE: No RF on 89 - by RodB - 12-18-2020, 07:13 PM

RE: No RF on 89 - by Patrick - 12-18-2020, 10:48 PM

RE: No RF on 89 - by Patrick - 12-20-2020, 10:15 AM

RE: No RF on 89 - by Patrick - 12-20-2020, 10:22 AM

RE: No RF on 89 - by Patrick - 12-20-2020, 10:50 AM

RE: No RF on 89 - by Steve Davis - 12-20-2020, 10:52 AM

RE: No RF on 89 - by Patrick - 12-20-2020, 11:54 AM

RE: No RF on 89 - by Patrick - 12-20-2020, 12:08 PM

RE: No RF on 89 - by RodB - 12-20-2020, 01:04 PM

RE: No RF on 89 - by 462ron - 12-21-2020, 08:16 AM

RE: No RF on 89 - by Patrick - 12-21-2020, 08:45 AM

RE: No RF on 89 - by Patrick - 12-21-2020, 10:07 AM

View a Printable Version

Users browsing this thread: 1 Guest(s)

Recent Posts
New Philco Repair Bench
I am sure this is the archive, and not the Chuck's site.morzh — 09:50 PM
Made mistake & did not label connection
It's not like we are good friends with that wire and can tell it from other ptetty identical looking wires. Why'n't you...morzh — 09:49 PM
Made mistake & did not label connection
I'm not sure why that wire wasn't covered in the video. I'm pretty sure the 6A8 won't work until that pin is grounded. Y...RodB — 09:47 PM
Made mistake & did not label connection
You'll have to forgive me, I am not sure what you mean. Can you explain what you are really saying. If anyone does not...georgetownjohn — 08:05 PM
Made mistake & did not label connection
Those are details better left to the ones who know. Maybe you disconnected the wrong end of the wire.RodB — 06:22 PM
Made mistake & did not label connection
Maybe this is starting to make some sense in my hard head. Is this why the wire in question was not in the great Ron Ra...georgetownjohn — 04:34 PM
Made mistake & did not label connection
I was correct with the 6A8 pin connection's, 7 and 8 are connected to ground as well as the tube shield (the broken line...RodB — 02:41 PM
Made mistake & did not label connection
What does the dotted line representing that surrounds the tube in the schematic?georgetownjohn — 02:17 PM
Made mistake & did not label connection
Hello John, I have been there either label got lost or was not labeled ! Sincerely Richardradiorich — 02:15 PM
Made mistake & did not label connection
Sorry, it is a Philco 37-640. Does that help?--Johngeorgetownjohn — 02:14 PM

Who's Online
There are currently no members online.

Login
Username:
Password:	Lost Password?
	Remember me