[Elecraft] K1 tuning range issue.

David Brown dbbrown624 at gmail.com
Fri Jun 19 15:03:58 EDT 2015


Gil,

My K1 is a two band (40/20) model purchased in 2001.  I too was concerned
with the lost "wiggle room" at the bottom of the bands, not to mention
different values on the two bands.  The 150 kHz VFO range ( I got 177 kHz)
was a bit too touchy for me yet the lower range was nice for smooth tuning
but a little limited on band coverage.  I decided a tuning range of 100 kHz
on 40 would be a nice trade off between band coverage and smooth tuning.
Experimentally I got this by changing C2 from 68 pF to 78 pF, then adding
14.1 pF across L1 to adjust the VFO range.  Silvered mica capacitors were
used for the mods.  I wound up with:

    104 kHz band coverage
    1.1 kHz lost wiggle room below 7.0 mHz
    7.4 kHz lost wiggle room below 14.0 kHz

73, Dave K8AX


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