Curt, Not practical. Yes, that might work, but you would need to design your own board (or highly modify the KFL1-4 board). The reason is in the Low Pass filters - there are only 2 - the board is wired for 2 bands to use the lower frequency LPF and two more bands use the higher LPF. The lower band LPF has a cutoff somewhere near 11 MHz. The lower 2 bands use this LPF. So the lowest low band must be higher than 1/2 the cutoff frequency - and in ham band language, that means 40 and 30 are a good pair. The higher band(s) Low Pass filter cutoff is just above the 15 meter band, so it is usable for any bands between about 12 MHz and 22 MHz - that means any two of 20, 17 and 15 meters. are the possibilities, but the board is wired so only 2 of these bands can be used.
You might want to consider a 4 band board plus an additional 2 band board - say for 80 and 17, and configure the 4 band board for 40, 30 and 20,15m. That would give you coverage from 80 thru 15 meters with a filter board swap. 73, Don W3FPR [email protected] wrote: > Since the KFL1-4 module allows either 17 or 15 selected at build time, I'm > wondering whether building say ??,20,17&15 (leaving out 30M or 40M)is > workable. It seems to me that this ought to work fine. With sunspot count > increasing, am wishing for 4 band module more focused to the higher bands. > > I personally find the K1 a really enjoyable little QRP rig to use, and have a > bunch of gear dwarfing it's diminuative size sitting idle on the desk. I > actually like using XIT on the K1 better than using split on my QRO rigs for > working DX. Recently have had VK2, EA1, E51, 5N0, CT9, KL7, and GA5 QSOs with > 3 watts on 17 and 15. It would be nice to not need to change filters to QSO > both of these bands. > > 73, Curt KB5JO > > ______________________________________________________________ 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
