Something that I have recently noticed on my K3S/100 : DC current draw on 20 meters is significantly higher (+4 amps) than the other HF bands at the same power setting and input conditions into a dummy load (into antenna, same thing). This is both before and after performing a TX Gain Cal.
Test conditions: mode Data A, input single test tone from FLDIGI software (4-5 bars ALC), tone level & frequency not changed during the tests, ATU bypassed, ANT1 selected. Power supply voltage in RX, 14.3 V, RX current 1.2 - 1.3 amps. This ONLY occurs on 20m, the other HF bands seem to be OK. (6m is higher than the HF bands by about 2 amps, not sure if that is normal or not). For example, with 80W out: 80m, 60m, 40m, 30m, 17m, 15m, 12m, 10m are all close to 16 amps, but 20m is 20 amps. (6m is 18 amps). I searched the archive and found a few references to "bad low pass filter". I have already emailed details to [email protected] but wondered if there is something I can check in the meantime until they get back to me. 73 David AJ4TF -- Sent from: http://elecraft.365791.n2.nabble.com/ ______________________________________________________________ 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]
