Your current readings don't look out of hand to me! 40 is normally higher because that is the band that usually produces the greatest RF output. Your readings are consistent with my K2.
Interesting that you say the "output reads over 15 watts in all cases,..". Few K2's make 15 watts on 10. Many are capable just over 10. When they do produce more power they draw more current. The current is proportional to the actual power output. The maximum power output varies according to the overall RF gain available in the transmitter strip and that tends to be highest in the 7-10 MHz range. So in that range the current draw is the highest too. Your current draw on 10 meters is consistent with an output of just about 10 watts output "wide open". I don't see how that's connected to your overcurrent with the SSB module plugged in, but it's an anomaly. Have you confirmed that your K2 internal current sensor is accurate by putting an ammeter in the lead from the external power supply? If it's okay, then there's little else but for your SSB module itself to be making up the extra current draw. Something on that module is drawing more current than it should. Ron AC7AC -----Original Message----- Hi Don and all, I have spent the afternoon looking for where I could have made a mistake on the 40m LPF circuit. I didn't find any obvious ones, the toroids came from 'The guy de Toroids' but I counted them all anyway, and they are (luckily!) correct. Same for capacitors. Did the run of voltage checks and didn't notice anything really wrong. On cw, cranking the output knob to the max, the display readings for current are 80 3.22 40 3.36 30 2.84 20 2.38 17 3.08 15 2.84 12 2.62 10 2.42 Output reads over 15 watts in all cases, usually abt 15.2. This reads pretty much the same with or without the SSB module installed. I take it from your comments that the fact that 40m is the highest cw reading, its indicative of something wrong. Looked at LPF and BPF areas. What should I expect on the amp readings, 2.35 on 40 and a gradual increase as I go towards 10m? I could reinstall the resistors and jumper and take out the noise blanker module as thats something put in yesterday, I take it that I need to do that if I want to test without it? I have boosted cal cur to 4.0 and still can get hi cur signal with output fully counterclockwise on both usb and lsb. I have been very happy working cw all week as it is (set the cal cur to 3.5 and it hasn't tripped yet). Any more ideas to look at? _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
