http://elecraft.85.s1.nabble.com/K1-VFO-frequency-range-tp7631062p7631094.html
> Just as an additional note. I built two K1's last year and even though I
> wound the turns for L1 so they were really tight as I found from experience
> its much easier to spread them out a bit than to compress them again. In
> both K1's I actually had to remove one turn to get the VFO low enough. The
> manual does mention this may be needed.
>
>
> Just though I'd bring that up since I had to do that fairly recently.
>
>
>
> Cameron - AF7DK/GM7LQR
>
>
>
>
> ------------------------------
> *From:* Elecraft <
[hidden email]> on behalf of Mike
> Morrow <
[hidden email]>
> *Sent:* Wednesday, May 24, 2017 9:04 AM
> *To:* roney;
[hidden email]
> *Subject:* Re: [Elecraft] K1 - VFO frequency range
>
> I assume you have already calibrated the LCD display on each band using
> the OCF menue function. That makes the LCD indicate the actual transmitter
> output frequency, This display calibration for each band must be performed
> before adjustment of where the low end of each band starts.
>
> Because the K1 has no way of adjusting the oscillation frequency of the
> individual heterodyne crystals on the filter board, the only band edge
> adjustment possible is accomplished by altering the VFO frequency. That
> affects both bands equally.
>
> Your data show the K1 tuning band is too low by about 5.2 kHz. The VFO
> SUBTRACTS from the heterodyne crystal frequency, so to RAISE the K1
> frequency of operation you must LOWER the VFO frequency by squeezing CLOSER
> together some of the turns on the RF board L1 VFO toroid. It won't require
> much. Try that until the low end of 80m indicates about 3499.0 kHz on the
> LCD. That 80m L1 adjustment will also bring the low end of 15m to about
> 20996.1 kHz. That will be the closest you'll get on 15m. If you adjusted
> L1 until 15m starts at 20999.0, then 80m will start at 3501.9 kHz. You'll
> have lost some low end 80m coverage.
>
>