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Old October 28th 05, 06:37 PM
Asimov
 
Posts: n/a
Default HIGH Q CAPS FOR VLF LOOP ANTENNA?

"TRABEM" bravely wrote to "All" (28 Oct 05 00:42:15)
--- on the heady topic of " HIGH Q CAPS FOR VLF LOOP ANTENNA?"

TR From: TRABEM
TR Xref: core-easynews rec.radio.amateur.antenna:219360

This should require a matching transformer otherwise not enough
current can flow to take advantage of the potentially huge Q. Without
current flow there will be no energy storage in a series circuit. In a
parallel circuit the current flow is internal between the parallel
reactances but in a series circuit it must be external. A series
circuit is naturally current driven so the transformer would basically
be converting current into a voltage that the receiver input can use.
If you measure your loop with a test signal you should find it
requires a lot of current and little voltage. From your
investigations, calculate the effective resistance and use this as
your Rs to find the actual Q and the matching turns ratio required for
an autotransformer, for example.

Good luck,

A*s*i*m*o*v

.... Why is Brassiere singular and Panties plural???