Hi Ford,
> I just used the Autek VA-1 to measure the input impedance of the
> receiver port on my IC-746.
The results might not be accurate. The VA-1 can overload the RF
stage, and that will normally change the impedance.
> My question is, do I care? More important, should I care?
I care here, because:
1.) I use narrow selectivity and external noise power is directly
proportional to BW.
2.) I use splitters, and they must be somewhat correctly terminated
terminated or one receiver "hogs signal" and will change the level in
other receivers.
3.) I already have a marginal change in noise when I remove the
antennas and replace them with a termination during some
operating conditions when I expect to operate.
You might not care.
73, Tom W8JI
w8ji@contesting.com
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