Parasitics in 89B Receiver - Printable Version

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+--- Thread: Parasitics in 89B Receiver (/showthread.php?tid=12223)

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Parasitics in 89B Receiver - stanleybadams - 05-08-2015

I have the 89B 123 with the 77 detector.  I had to rewind the oscillator coil as in many other sets and all is working and about to package it up and call it fixed when lo and behold I find a parasitic.  The set is self oscillation on 600 khz and there is a station in this market on that channel.  So out come the bypass cap and see if I can place it across something that will stop the parasitic.  Just wonder if any others have seen this.

Stan Adams
Memphis  

Edit: Model number corrected.

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RE: Parasitics in 39B Receiver - Phlogiston - 05-08-2015

Maybe a few drops of Frontline or Advantage, take care of those nasty critters.

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RE: Parasitics in 39B Receiver - stanleybadams - 05-08-2015

yea buddy, if you have ever spent a night in a cold transmitter building trying to get birdies out of a broadcast transmitter, now that is some fun!!! Napalm might work better.

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RE: Parasitics in 39B Receiver - Radioroslyn - 05-09-2015

Hi Stan
Couldn't find any info on your set unless it is a battery job??
Terry

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RE: Parasitics in 39B Receiver - stanleybadams - 05-09-2015

89B is 34 Tombstone, I had birdies in the first RF Amp-1st Detector/Mixer, just backed the gain down a bit.

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RE: Parasitics in 89B Receiver - Radioroslyn - 05-10-2015

Methinks you mean a model 19. Well you could have taken it to France to be with all to other Parisasites.
GL OM
Terry

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