[Elecraft] K1 VFO Range Question

[Rick Dettinger]

Hi Curt,

I like the 150 kHz tuning range.  Mine is actually 170 kHz, which, of  
course, gives an average rate of 17 kHz per revolution with the 10  
turn pot.  I think this is still slower than the top rigs of my youth,  
which we though was quite good.  I don't remember hearing complaints  
about the Drake and Collins tuning rates, which, IIRC, was in the 20  
kHz per turn range.  Of course, they did have larger knobs.  I put a  
K2 knob on my K1, but I don't think that was necessary.  I had to ream  
the hole to 1/4 inch.  It should be possible to come up with a  
capacitor size that would give a 125 kHz. range, which I think would  
be ideal for 40 meters, but I haven't tried that yet.

73,

Rick Dettinger   K7MW


> I built my K1 awhile ago with a VFO range of 80 kHz, also a 4 band  
> filter and 2 band filter.
> With recent increase in QRM levels on 7030-7040+-, am considering  
> expanding the range to 150 kHz.
> This will allow me to work the old Novice segment on 40M.  Seems  
> the  only change needed is the band crystal for 30M on the filter  
> board and one capacitor on the RF board.  Noting the caution in the
> manual about using wider range with the 4 band filter am wondering  
> what other folk's experience
> has been with the wider range.  I'd hate to foul up what has been a  
> wonderful QRP rig.
>
> Thanks and 73, Curt KB5JO