I just realised, the question of optimising the L1 and L2 inductors in the LPF for the basic radio is a bit academic anyway, since those inductors will be replaced when I install the KXB3080 module. Thanks also to those who replied off-list.
73, Matt VK2RQ > On 11 Apr 2014, at 12:46 am, Matt VK2RQ <[email protected]> wrote: > > I just made my first contact on my new KX1 with a VK5 about 700 miles away > who was running a K3 -- the KX1 is indeed a very nice rig. > > Initially I was getting about 2.7 W out on 40m and 3.2W out on 20m (13.8V > supply, 50 ohm dummy load). I read in the manual that the output on 20m > should normally be less that on 40m, and this can be achieved by compressing > turns on the L2 inductor to adjust the LPF. I found that compressing turns on > L2 reduced the output power on both bands, but 20m was still more output than > 40m. By compressing the turns on the L1 inductor as well, 40m is now around > 1.9W, and 20m is around 1.8W, so overall power is reduced, but the 20m output > is now below the 40m output. In the KXB3080 module kit which I haven't built > yet, I think there are some resistors that can be swapped in for R11 and R30 > to bring output power back up a bit. Is there anything else I can check to > make sure the LPF is set up properly? > > 73, Matt VK2RQ > > ______________________________________________________________ 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 Message delivered to [email protected]
