John, 240 ma is quite normal for receive current on a K2. However, I just measured the resistance from RF board U6 to ground on 2 K2s and found the normal resistance is about 240 ohms.
I also tried checking the current draw when the dit key is held down (power set to zero and the keying input set to HAND) - the current increase is a bit over 20 ma., so I can't explain why you are seeing only 160 ma - unless your keying input is set to paddles, and then it is possible that the changing display numbers are not settling fast enough to give you a valid reading. 73, Don W3FPR John wrote: > Hello all K2 users. > I'm trying to track down a problem on the rf board. > Pin 8 of U6 shows a resistance of approx 50 ohm when it's supposed to > be greater than 100 ohms. > I've gone ahead and assembled the rest of the kit and I am not happy > with the amount of current > it draws, approx 240 mils. > I notice that when listening to WWV at 10 megs if I hit the "dit" key, > the current drops to 160 mils. > Anyone else see that? > I wonder what part of the circuit is dropped when the key is closed > and if it's the 8B line, (where I'm > seeing the low resistance.) > I know I can use it the way it is but it's really not what I'd like to > use if it draws more current than it's > supposed to. > Don and Gary have offered advice and I wonder if anyone else could > shed more light on > locating the problem of low resistance. > Nothing is getting overly warm, that I can find. > Thanks. > John. > _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
