ON5MJ wrote:

Thank you again all OM for your interesting replies.

This one from Ken could be worth the effort of investigation. I also thank
Bob who replied me personnally.

Did somebody try to replace a roller coil by a serie made of a tapped coil
and a variable capacitor ?

73 de Jacques - ON5MJ


You could do that, but again, if you have enough other adjustments you
can probably make the fine adjustments on the caps.

My first antenna tuner, which I used for several months, was just an
L-network with a tapped coil (with an alligator clip) and a variable
cap. By reversing the direction of the thing and dinking around it
always worked for me -- and since it was on an open piece of aluminum I
could hear, smell and see when I was putting too much RF into it for the
little broadcast tuning cap!

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com