[Elecraft] K2 rev B low sensitivity

[Wallace, Andy]

> -----Original Message-----
> From: Dave Sergeant [mailto:dsergeant@connectfree.co.uk]
>
> Level to just illuminate S9 LED
> Preamp off -63dBm or 159uV
> Preamp on -78dBm or 28uV

Thanks for that info, Dave. Very handy to have.  I imagine there are
variations in sensitivity depending on construction technique and
filter width/alignment, and also it may change depending on what the 
sidetone offset is. 

This weekend I may do a more careful Spectrogram alignment. I noticed
that switching in a narrower filter did in some cases produce a slightly
higher S meter indication. 

> Slightly worse than the ARRL figures, but they were possibly in an 
> SSB filter, but taking into account the various errors seems in the 
> same area.

Yes -- a shame they didn't say which. 
 
> I tend to use the preamp all the time, but my antenna (60ft long 
> wire) is hardly receiver overloading stuff.

That's the other half of the equation -- comparing perceived rx
level between the K1 here, with the KAT1 inside, and the stock K2,
is unfair. The K2 sees a mismatch.... at least until the KAT2 arrives. ;-)
I am sure I'll see an improvement afterwards in real band performance. 

Andy