[Elecraft] K1 on 80m band

[Don Wilhelm]

Petr,

There is no easy way to add 80 meters to the 4 band board - it would 
take a large re-design effort and would produce only 3 bands when you 
finish with it.  There are only 2 Low Pass filters, one with a cutoff 
above 30 meters and the other with a cutoff frequency above 15 meters.
80 meters requires a low pass filter with a cutoff frequency less than 7 
MHz to eliminate the 2nd harmonic.

The best solution is a 2 band board built for 80 meters and any other 
band.  The 2 band board does not have the "band pairing" limitation like 
the 4 band board.  Any band combination is possible.

73,
Don W3FPR

On 8/3/2011 12:14 PM, Petr Ourednik wrote:
> Hi all,
>
> I would like to gently ask for help.
> Is it possible to add 80m band to K1 using 4-bands module?
>
> My daddy has in his K1 40/30/20/15 band module currently but
> as he like 80m he would like to add 80m band to his K1.
> Is there any combination like 80/40/30/20 or so available please?
>
> Thank You for tip what I should order or purchase for him.
>
> 73 - Petr, OK1RP
>