Hi Mark,
The difference between an antenna analyzer and a grid dip meter is primarily
the input impedance. The low input impedance of the antenna analyzer makes it
difficult to use in a loosely coupled manner. The high input impedance of the
dipper allows easier coupling with a tuned a tuned circuit. Something like
that, anyway...
MFJ sells an adapter for the 259B that allows it to be used as sort of a grid
dipper, but I believe it has very limited capability.
You can often buy a grid dipper at a hamfest flea for very little money. They
come with sets of coils for coupling to the DUT [device under test] over
certain frequency ranges.
Someone smarter than me will provide a more accurate answer on the theory of
operation.
73,
Jim Idelson K1IR
email k1ir at designet.com
web http://www.designet.com/k1ir
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See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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