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 > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
