[Elecraft] KRX3 in action

[AD6XY]

Congratulations.

The frequency offset is perfectly normal. It is related to the synth and any
filter offsets. With matched filters it is a very low beat frequency that
can be a little disturbing on stronger signals. A greater offset might be
better and could aid in detecting weak signals. You could get that my
offsetting one of the filters a tad.

I found a birdie just below 50.05 MHz while looking for our beacon. It is
not too strong. Such things are inevitable unless you want to add 20kg of
screening materials. An unlocked birdie might be a spurious oscillation
problem. Did you ensure the cables are as far away from the VCO cores as
possible?

Mike



oe9fwv wrote:
> 
> good morning, 
> 
> the KRX3 arrived and I installed it yesterday. After doing the VCO
> calibration 
> and filter settings it is working fine. 
> I have observed two things that are not clear to me so I wanted to ask if
> this 
> is the same at your K3's. 
> 
> When I switch SUB on and I have the antenna shared between the main RX 
> and the sub RX and both are exactly on the same frequency I can hear a 
> strange "stereo" sound in the headphones. It sounds like the signal is 
> moving in my head from left to right. It reminds me to a zero beat at
> about 1 
> hz. Is this normal?
> 
> Second: I have a relative strong birdy (S3-4) at 7120 khz which is 
> microfoning when I tap on the K3. It is only present in USB!
> There is another one with lower intensity (S1) at 14.185 - no microfoning 
> when I tap. The birdy on 6m that I had befor I added the KRX3 has 
> disappeared completely here. 
> 
> 
> 73! de Werner OE9FWV
> 
> 
> 
> -- 
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> 
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