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Title: Ranger Buzz Post by: K6JEK on September 12, 2011, 07:11:40 PM Ranger Buzz. Does that ring a bell with anyone? I passed a very pretty Ranger II off to my pal Gary, K6GLH, and the thing has a nasty looking waveform, noisy, buzzy. That's in CW as heard on a monitor receiver or viewed on a scope.
I have some dim recollection of a common affliction, Ranger Buzz, but can't remember much more. I haven't done anything with Rangers in a long, long time. This one was gathering dust. Now, however, it's providing unexpected entertainment. Meanwhile, Gary's Desk KW is pining for some drive. Thanks, Jon Title: Re: Ranger Buzz Post by: WQ9E on September 12, 2011, 07:52:27 PM It could be power supply filter caps but first I would check to see if the buzz is also present with a crystal, it could be heater cathode leakage in the VFO tube. If it has the keyer tube installed, this can also hum modulate the VFO via heater cathode leakage.
Title: Re: Ranger Buzz Post by: Knightt150 on September 13, 2011, 05:19:33 PM If this RANGER has been setting for a long time and was turned on the HV filter caps probibly did not form correctly. If you check the caps they will show a higher value than the 10 mf that it should be. The cap needs and new one in it's place.
Title: Re: Ranger Buzz Post by: K6JEK on September 15, 2011, 10:14:55 PM Thanks for the tips. It turned out to be e) none of the above. Someone who shall remain nameless was overloading the SDR he was using as a spectrum analyzer. Again. This person shall remain nameless. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
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