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Philco 37-116 Band #2 Oscillator coil repair
#1

Hello everyone, I decided a few weeks ago to tackle the open band #2 oscillator coil on my other Philco 37-116 chassis. I wasn't looking forward to taking apart the RF unit but it had to be done. I tested the oscillator coil previously and it had continuity from 1-2, 2-3, 3-4 but open from 4-5 which meant the primary windings were good and secondary was bad. I remember when Phorum member Rfeenstra restoring a 37-116 chassis he had back in 2019 and he showed how he rewound his open band #2 oscillator coil--I looked at how he did it and rewound my secondary winding on my coil. I used #36 AWG copper enameled wire and rewound the secondary using 12 turns of wire--- I counted 11 turns but added an extra turn just in case I didn't have enough range on the adjustment trimmers. I recoated the windings with wax and installed the coil and reinstalled the RF deck in the chassis. I then retested the chassis holding my breath as I haven't rewound an oscillator coil successfully before and wasn't sure it would work. I was very surprised not only did it work on band 2 but I was able to align it at both ends of the band and no oscillator dropouts anywhere on the band--CHU on 3.330 MHz, WWV on 2.5 MHz and my local station on 1.6 MHz (1600 KHz) were on the correct spots on the dial. I thought I would let everyone know just in case they have a band 2 oscillator that they need to rewind.   Ken


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Philco 37-116 Band #2 Oscillator coil repair - by Kenradio - 01-05-2022, 07:15 AM



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