On Tue, 19 Apr 2005 20:27:57 -0400, Ken Scharf
wrote:
[snip]

There were dual band tank circuits for tube amps that worked on
both 6m and 2m without changing coils. The circuit was made in
both single ended and push pull versions. The push pull circuit
had two separate pick up link coils and basicly was series tuned
on 2 meters and parallel tuned on 6. The 6 meter tank coils were used
as rf chokes on 2 meters. The single ended version used a similar
trick, but was link coupled on 2 meters, and could either be link
coupled or a Pi network on 6 meters.

Only someone who never used one of thse would claim that they
"worked." [g]