I am trying to gather the parts necessary to modify my Heath SB221 linear
amplifier for 160m operation as outlined by Richard Measures, AG6K, in his
article that appeared in the January 1989 issue of QST. One item I'm having
a particularly difficult time locating is a slug-tuned, 4 to 6 uH coil for
use in the 160m tuned input circuit. The few ceramic slug forms that I've
run across have not proven acceptable for use. I would imagine that the one
used in the Heath SB1000, which has 160m coverage, would probably be ideal,
but have no idea where to find one. I would appreciate any assistance with
locating a ready to use slug tuned inductor, or just the appropriate form.
Tks & 73,
Daniel/K4DB
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