. I've been contemplating the same thing. I've got
> >a roller in my Johnson Thunderbolt and it works OK. I guess as long as the
> >inductor can handle the power and is cooled (at high freqs) it shouldn't be
> >a problem.
> >
> general coverage is an advantage.
I don't know if you are planning on 160-10 meters, but I too like the way Henry
does it.
Their roller coils are ganged together so that the Pi and L coils track
perfectly across
the spectrum. The 4-K Ultra even had the vacuum tune C ganged to the coils. Only
two knobs on the front..."tune" and "load." In the 3-K Ultra and 8-K Ultra,
large door knob
caps are switched with solenoids for the tune C, and the Pi and L coils are
ganged to
track. Another solenoid shorts out half of the Pi coil on 40 meters and above.
(Henry coils are stationary with the roller on the inside allowing fixed taps
on the outside.)
I have had great luck with the large Johnson coils. Adequate band switches for
8-9 bands
at a reasonable price are hard to come by.
(((73)))
Phil, K5PC
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