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38-12 Oscillator Replacement
#19

Hope maybe I am not on the wrong track.  I substituted another "OS coil" pulled from a like kind chassis found on eBay.  Ohms on the coil looked good 3.5/6 ohms PN #32-3021.  Although not exact rr coil it responds just like the universal OS I tried .  My symptoms are as follows.  I get reception.  (Prior issue was no reception and open OS coil)  Reception is only from aprox 770KC to 1080KC all appearing higher on the dial.  EX  820 is showing around 1100.  Tried to adjust the Compensator 3B-3A  .  moved the signal a little but very little,  There is an adjustment on the underside of the tuning Condenser similar to the top 3B.  Slight change but not significant.  I have ohm the 51K resistor out of ckt and it measures 56K.  The 110 uf measures 160UF out of ckt.  Enclosed are my V measurements on the 6A&.  *I have also substituted the 6A7 and 78 tubes for trial.  Can't seem to understand why the frequencies are so far off .  IF adjustment has some slight up/down but nothing .  Lower frequency channels do nit register.  550KC to aprox 700.  


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Messages In This Thread
38-12 Oscillator Replacement - by Radioguy52 - 04-28-2022, 11:17 AM
RE: 38-12 Oscillator Replacement - by Radioguy52 - 04-28-2022, 02:41 PM
RE: 38-12 Oscillator Replacement - by Radioroslyn - 04-28-2022, 04:40 PM
RE: 38-12 Oscillator Replacement - by Radioguy52 - 04-28-2022, 05:11 PM
RE: 38-12 Oscillator Replacement - by Radioroslyn - 04-28-2022, 05:48 PM
RE: 38-12 Oscillator Replacement - by Radioguy52 - 04-28-2022, 09:19 PM
RE: 38-12 Oscillator Replacement - by Chas - 04-28-2022, 10:14 PM
RE: 38-12 Oscillator Replacement - by Radioroslyn - 04-29-2022, 09:53 AM
RE: 38-12 Oscillator Replacement - by Radioguy52 - 04-29-2022, 10:49 AM
RE: 38-12 Oscillator Replacement - by Radioguy52 - 04-29-2022, 10:52 AM
RE: 38-12 Oscillator Replacement - by Radioroslyn - 04-29-2022, 02:54 PM
RE: 38-12 Oscillator Replacement - by Radioguy52 - 04-29-2022, 03:46 PM
RE: 38-12 Oscillator Replacement - by Radioroslyn - 04-29-2022, 04:17 PM
RE: 38-12 Oscillator Replacement - by Radioroslyn - 04-29-2022, 04:28 PM
RE: 38-12 Oscillator Replacement - by BrendaAnnD - 04-30-2022, 02:11 AM
RE: 38-12 Oscillator Replacement - by Radioguy52 - 05-01-2022, 06:21 PM
RE: 38-12 Oscillator Replacement - by Mondial - 05-01-2022, 08:29 PM
RE: 38-12 Oscillator Replacement - by Radioguy52 - 05-01-2022, 10:02 PM
RE: 38-12 Oscillator Replacement - by Radioguy52 - 05-10-2022, 08:09 AM
RE: 38-12 Oscillator Replacement - by Chas - 05-10-2022, 09:42 AM
RE: 38-12 Oscillator Replacement - by Radioguy52 - 05-10-2022, 10:14 AM
RE: 38-12 Oscillator Replacement - by Radioguy52 - 05-10-2022, 11:07 AM
RE: 38-12 Oscillator Replacement - by David - 05-10-2022, 11:59 AM
RE: 38-12 Oscillator Replacement - by Radioguy52 - 05-10-2022, 02:38 PM



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