Theo,
A roller inductor will give you "general coverage" as well as being
able to fine tune each band better than with fixed taps. However, there
is an added circuit to adjust every time you change bands. I like the
way Henry does it, switching in fixed capacitors for TUNE and a roller
inductor and variable LOAD cap. If you plan on using relays in a tank
circuit, you better plan on using vacuum relays. You will also still
need a 10M coil hanging off of the roller inductor. The roller inductor
probably won't have enough Q and surface area to keep the amp happy on
10 and 12 meters.
As for preferences, one less adjustment when changing bands would be
favored by me.
Mike, W1NR
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