[Lowfer] A bit of a problem with trimmer caps

[Bill Ashlock]

Mike,

>So back to the drawing board huh???

Well, more like 'back to the capacitor pile'. At the moment I'm thinking I 
might give this 100pf air variable a try. That's all the variability I need 
to tune from from -3db to -3db points, once the capacity range is centered 
using medium sized capacitors (and this can be accomplished with a 
temporarily-installed trimmer).

>I think I will go back to finishing the copper pipe variable cap then 
> >since it appears at this point that the air variable caps could be a 
> >problem whether it is a big sucker like my Johnson cap

What's wrong with that vacuum variable as long as you connect a wire to 
bypass the sliding contact? BTW this jumper wire idea will work on any air 
variable as long as a small plastic stop is installed to allow only 180 deg 
rotation.

>or the small trimmers. Just when you think it is all figured out Murphy
>steps on your toes.

Wouldn't call this Murphy as much as just plain learning about the effects 
of the environment these high Q circuits have to live in.

Bill

PS: Just got both loops working without any interaction between them. In a 
few minutes I'll be modifying one of my Basic programs to allow the 
sequencing. Let the snow begin!

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