My first thought on the audio was to get some efficient earbuds. Lightweight and cheap.
Over on the KX3 list, people like the Chill Pill powered speakers. I know it is a second box, but the Hardrock 50 amp has been getting good reviews. You would not need to get it out except in an emergency, so it could stay deep in the pack. See: http://www.hobbypcb.com/amateur-radio/amateur-radio/hardrock-50-hf-power-amp-kit.html I think there is a lot of evidence that 3dB does not matter. 10dB matters. 6dB might matter. wunder Walter Underwood K6WRU CM87wj On Sep 27, 2013, at 6:35 AM, Allan Taylor wrote: > I unask the first question (how to raise K2 output power). But in > self-defense, > I knew that: > PAs have better distortion properties with higher supply voltages > 14->20W is about 1 dB but 10->20W is 3.01 dB (3 dB MATTERS!) > operating above 10W on ssb with the K2 was not a good idea as > designed > and I would only do so in a true emergency > the PA devices would need to be replaced > the PA output network would need to be redesigned completely > the driver stage would need to at least have a huskier device > the existing K2 PA heatsink method may be marginal already > I would be barraged by nay-sayers > > but I did not know that the MCU was so tightly involved in power level > control. > > Purchasing the new 100W amp from Elecraft wouldn't meet my needs for at > least > three reasons: > for the same $$$ I could get a used Herc II !! > fails the one box test > would be much less efficient at 20W than a solution designed for > 20W > > I am still looking for a known solution to the relatively low RX audio > issue. > While buying the K2 audio filter module would work, it is an expensive > option. > (Does anyone have a used KAF2 laying around?) > > Now as a well-known QRPer (KU7Y) often says > > "now back into my hole" > > -- > 73 Allan K7GT > ______________________________________________________________ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
