[Milsurplus] Bendix Skipper 135: OOPS! and Opinions

[MICHAEL ST ANGELO]

I vaguely remember the manual describing a dummy antenna circuit to use with a signal generator when adjusting the receiver. I wish I kept the manual.

As the sets were retired I kept the coils and taps to use in future tuner projects.

I remember a the a popular VHF set which replaced the MF radios had 6 channels and was crystal controlled. One could get sets with more channels but crystals were expensive.

Mike N2MS

 
> On 10/26/2021 10:44 AM Robert Nickels <ranickels at gmail.com> wrote:
> 
>  
> On 10/26/2021 8:03 AM, MICHAEL ST ANGELO wrote:
> > I used to repair and tune Marine MF (2 to 4 Mhz) radios on boats when 
> > I was in college 45 years ago. I had to adjust the output series coil 
> > to resonate the 20 foot whip antenna. My memory is vague but the coil 
> > was used to resonate with the fiberglass whip on board the boat; the 
> > load was not necessarily 50 ohms.
> 
> I've converted a bunch of them to 75 meters and just set the loading 
> coil clips to short it out or remove it (good item for the junk box) and 
> bypass it, since I'm always going to be using an antenna that provides a 
> 50 ohm load.   Depending on the radio it's sometimes necessary to fiddle 
> with the tank circuit to get full output as high as the AM window.
> 
> I did set the loading coil up on one boat radio for a 30 or so foot wire 
> thinking it would be usable on portable setups, but unlike on a boat 
> where the short vertical is asways in a consistent position and the 
> ground counterpoise is the same, there was so much variability in my 
> portable setups that the pre-set coil taps were way off.   I found it 
> much easier to set it as described above and use a small conventional 
> antenna tuner to resonate whatever piece of wire I was able to throw up 
> at hamfests, etc.
> 
> 73, Bob W9RAN
> 
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