[Elecraft] KSYN3A Synthesizer problem?

Roger D Johnson n1rj at roadrunner.com
Mon Apr 6 19:01:48 EDT 2015


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



More information about the Elecraft mailing list