No RF on 89

Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

Linear Mode

No RF on 89

Steve Davis
Phorum Expert

Posts: 1,419
Threads: 71
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 »

Thread Closed

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
HiFi (Chifi) tube amp build - but my own design.
It's the other forum. I'm also in DIY, but mostly read there. Honestly, I kinda jumped into this without much thought to...TV MAN — 10:43 AM
Philco 71 Code 125
Hello, I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same. I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting. IF alignment went great, almost all was already spot-on. Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM
54C Cabinet Refinish
I started stripping this cabinet before it got super chilly out because I knew I wasn't going to be able to work on ...glyphmon — 11:18 PM

Who's Online

There are currently 1420 online users. [Complete List]
» 1 Member(s) | 1419 Guest(s)

Login
Username:
Password:	Lost Password?
	Remember me