[Elecraft] K1-4 Bands

[Don Wilhelm]

George,

With some serious re-design, you could have an 80, 20 15 (or 17) meter 
board (only 3 bands).  The low pass filters are shared, and the LPF must 
have a cutoff frequency below the 2nd harmonic.  So 40 and 30 work well 
together, and 20 and 15 (or 17) work well together, but 80 would have to 
stand alone.
30, 20 and 15 (or 17) could be made to work with the LPFs, but the relay 
switching will not allow that 3 band combination.  As a result, you 
could modify the 4 band board to work as a "3 band" board with 80 and 
20, 15 (or 17), but that would be your only choice.

It would be better to procure another 2 band board and configure it for 
80 meters plus another band of your choice.

73,
Don W3FPR

w2bpi1 at aol.com wrote:
> I just ordered a K1-4 to build after the first of the year. I  wanted to 
> build it for 80-40-30-20. But there is not a 80 meter option listed. I  really 
> do not want to mess with using 2 boards. Is there a way for me to add 80  
> meters to the 4 band board?   Thanks George/W2BPI
>   
>