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How about a large slug tuned inductor? I have an old RCA broadcast
transmitter form the 50's that has one. It is a large inductor (4"diameter,
9" long) with what looks like a tin can in it that moves back and forth. I
dont know what kind of range it has but it seems to work well. I really like
the idea of compressing the coil like Alex mentioned but I guess there are
power limitations when the turns get close.
Have fun and Happy Holidays!
Jim
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<HTML><FONT FACE=arial,helvetica><FONT SIZE=2>How about a large slug tuned
inductor? I have an old RCA broadcast transmitter form the 50's that has one.
It is a large inductor (4"diameter, 9" long) with what looks like a tin can in
it that moves back and forth. I dont know what kind of range it has but it
seems to work well. I really like the idea of compressing the coil like Alex
mentioned but I guess there are power limitations when the turns get close.
<BR>Have fun and Happy Holidays!
<BR>Jim</FONT></HTML>
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