No RF on 89

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No RF on 89

Steve Davis
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Posts: 1,419
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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

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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

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