Any recommendations for a "high-reverse isolation buffer" circuit?
No.
I just want people to be aware that the I.F OUT jack is exactly that:
and I.F. *OUT* jack. All bets are off if you inject a signal into this
connector.
Keep in mind that the Softrock is a $12-class receiver, not a $500 class
one, so you cannot assume that it has much L.O. suppression at its
antenna jack. People get so excited by the concept of a cheap receiver
for their PC, and by the "software defined" mantra, that they overlook
the fact that $12 hardware is, after all, $12 hardware. It *admirably*
serves its purpose of introducing people to what can be done with DSP,
and Tony and associates have done a wonderful thing to make this
available to the Amateur radio community.
But adding a spectrum monitor to the K3 is a systems design exercise,
and you need to be aware of the limitations of the system components,
including the I.F. OUT jack of the K3 :-)
I suggest a careful, thoughtful reading of Larry's notes <
URL:http://www.telepostinc.com/K3pan.html > as he approaches the
addition of a panadapter to his K3. There are a number of issues which
he addresses.
73,
Lyle kK7P
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