[Elecraft] KSYN3A Synthesizer problem?

[Ross Primrose]

It sounds like you've only put one new board in a 2RX K3.  I don't 
believe that's a supported configuration...

73, Ross N4RP

On 4/6/2015 7:01 PM, Roger D Johnson wrote:
> My new boards arrived today. I popped one into the K3 for some 
> testing. I was especially interested
> in the low frequency performance as I like to DX the LF broadcasts 
> from 153 to 279 kHz. What I found
> was that below 400 kHz, the noise level rises and at 100 kHz it's 
> almost 20 over 9 on the S meter!
> I calibrated my NaP3 spectrum analyzer program and took some 
> measurements of the noise level.
>
> 500 kHz  -127 dbm
> 400         -127
> 300         -124
> 200         -113
> 100         -93
>
> That's a 34 db increase in noise level!! Is this the way the new 
> boards are supposed to work?
> I expected a decrease in sensitivity below 500 kHz but not this. Any 
> ideas?
>
> 73, Roger
>
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