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.
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