Great helpful ideas!
I checked out the ebay posting and saved the relevant
pics for future reference.
Will have to dig into the tuner to see where best to locate
the switched caps.
> As an added note, the Henry HF amps use a series of plastic cams on a
> shaft geared to the band switch.
> There is a 2KD classic on e-bay that has several photos that show the
> cams. Today is 18th and it should be there of a bit over 5 days. Watch
> for line wrap on the link.
>> There's also a cam on a shaft tied to a knob, or push-pull switch,
>> disk of
>> plesiglass with arm mounted on one side. In the case of the old B&W tank
>> coils/band switch we tied the caps to the 80 meter position. Let your
>> imigination be your guide.
>> You are certain to give away some high-end tuning capability because
>> the minimum capacitance of a big air variable will probably still
>> present a fairly low reactance on upper HF.
>>> Why not add some 250 or 500pF doorknob caps that can be switched in
>>> in parallel with the current capacitors?
>>>> I'd like to improve performance on 80 & 160M
>>>> QRO and read of one Ham changing the C1 240pf
>>>> input series cap to 750pf and C2 114pf to 675pf.
Thanks! & 73, doc, KD4E
TowerTalk mailing list