[Elecraft] K3 - Strange problem on 10 Meter SSB with power

[Toby Deinhardt]

Hi Lyle,

I do not know if we all might be talking about various ills with similar 
symptoms. It might be that more than effect might be behind the various 
observations, imho.

What I have, to the best of my memory, observed in various firmware 
versions is that there is/was a tendency for the K3 to have lower output 
in SSB on both(?) sidebands than in CW or tune modes. The output is at 
times 1dB less and at times 6 or more dB lower. This effect is stronger 
at lower power levels than at higher and usually occurred after changing 
the power level request while in SSB.

This was at times a major fubar, but in the newer versions of the K3 
firmware on my K3 (#67) the situation has greatly improved. Because I 
had sent more than one mail to Elecraft, in the distant past, about this 
and the situation, at least for me, has been improving, I did not want 
to harp about it.

For example, during our expedition to OY in early July such weirdness 
only popped up very rarely. I have not tested the newest beta firmware 
for this (yet).

I have the 2.7kHz filter in my K3.

vy 73 de toby, dd5fz



Lyle Johnson wrote:
> The problem I have been aware of is the LSB/USB power output difference. 
>  That seemed to be confined to 2.7 kHz filters, was related to the 
> center frequency offset, and should be fixed in the latest beta firmware.