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>Dear J.B., LF Group
>
>I think the problem here is the size of the
coupling loop, which is only
>slightly smaller diameter than the main
loop.
>
Hi Jim, LF Group,
My antenna is based on the successful design by
Steve, VE7SL, with
only two differences, 1) my pickup loop is
shielded, and 2) I used #12
wire rather than #20. Could those two
differences make that much of
a change in the loop operation? I know
that all other things being the
same, using the larger gauge wire would have raised
the Q, but would
it change things so drastically that I'd have to
use a smaller diameter
pickup loop?
Steve suggested that I use a simple non-shielded
pickup as he used
on his antenna. I tried that, but I found
little or no difference between
it and my shielded pickup. Both where spaced
about 6 inches inside
the main loop, just as on his antenna, which works
fine. That's what
is puzzling me, why does it work OK
for him but not for me??!!
If I go the transformer route as you and several others have suggested,
do I need to physically remove the pickup loop
or simply disconnect it?
I'm hoping the latter, as it'll be difficult to
remove without lowering the
antenna! Thanks for your suggestions and
hopefully I'll get the bugs
out of the way and be able to enjoy hearing things
shortly.
73, J.B.
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