[Elecraft] Re: K1 on Ten meters?

[Wayne Burdick]

> This post is to ask two questions really.
> 1. Is it possible (or practical) to convert the K1 to operate on Ten
> meters?
> 2. Is there enough interest to make the effort worthwhile?
> 
> If the answer to either question is no, well we can just move on the
> more
> practical matters and have some fun.  I will be looking for QRP contacts
> during the CQ WW contest next weekend. The one with the most electrons
> left at the end of the weekend wins.
> 
> Mike, AC4UR


Hi Mike,

The K1's firmware supports 10 meters, but we have not created a band-module kit
for it because it presents a couple of challenges. First, it requires a
36.000-MHz fundamental-mode crystal. Last time I checked this was a pretty
expensive item. (You could use a 3rd-overtone crystal, but this would require
construction of a 3rd-overtone oscillator on the KFL1 board just for this band,
along with a different crystal switching scheme.) Next, the transmit strip may
roll-off pretty quickly above 21 MHz. 

It's certainly worth a try, though. If you can find a crystal supplier who is
willing to roll you a 36-MHz fundamental crystal at reasonable cost, and order
one, I'll calculate the component values you'd need for the KFL1-2 board, and
you can try it.

For crystals, try ECS and ICM.

Wayne