[Elecraft] K3 - diversity reception question

[wayne burdick]

Dr. Werner Furlan wrote:

> hi Wayne,
>
> thank you for your answer and suggestion but - the difference in 
> volume is
> much less than 10db.

Using the MAIN antenna for the subreceiver switches in a -3 dB pad, 
which is required to split the path to the two receivers. This results 
in about a 3 dB signal attenuation in both. This may be part of what 
you're hearing.

There also may be slight differences in overall path gain between the 
two receivers, even when configured identically. Here are some 
contributing factors:

1. band-pass filter alignment and losses
2. 1st mixer loss
3. crystal filter loss
4. crystal filter ripple
5. physical alignment of the SUB AF control (when used as main/sub 
BALANCE)
6. ears

It's quite plausible that overall receive gain could, therefore, differ 
by a few dB between main and sub receivers.

You could use the K3's built-in true-RMS AF voltmeter functions to 
determine the exact amount, on each band (AFV/dBV).

73,
Wayne
N6KR

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