zeno wrote:

why would you not need to use the Xtal to calibrate the VFO for ham use?

Bill K6TAJ

On the 6-9MHz one I had many moons ago the xtal cal point was up at the
top end, close to 9 MHz and didn't serve much of a purpose for exact 7
MHz calibration. Of course I was *supposed* to be using xtals as a
Novice :-)

It would be preferable just to accurately set the dial at 7MHz. Once
its set its very accurate. Its will be as exact as you can interpolate
across the little swath of the 40 CW band.

-Bill