Hi Don, Perhaps against my better judgement, I adjusted the bias current of the KPA100 in the KAT100-2 remoted from the K2. Now I'm thoroughly confused! :-(
The current measurements of the KPA100 in the K2 make sense to me: Power < 11 W, Current ~ 380 mA Power > 11 W, Current ~ 520 mA Power > 11 + Fan on Lo, Current ~ 565 mA Add 400 mA for the bias current, and you get a target of ~965 mA. The current measurements of the KPA100 in the KAT100-2 remoted from the K2: Power < 11 W, Current ~ 88 mA Power > 11 W, Current ~ 229 mA This makes sense to me because the KPA100 is providing power to the KAT100-2 now, which apparently draws a lot less current than the K2 plus options. Here's what doesn't make sense to me: Turning on the fan now that it's in the KAT100-2 does not increase the KPA100's current draw at all, but it makes the current draw of the K2 go up! The only connection between the K2 and the KPA100/KAT100 is the data cable connecting the RS-232 ports. Is this data cable providing current to power the fan?! If so, how do I factor all this into figuring out a target for the bias current adjustment? Do I add 400 mA to the 229 mA value and be done with it? Thanks for straightening me out!! 73 N5BCN - Brian ----- K2 #6800 KPA100/KAT100-2, KSB2, KAT2, KIO2, K160RX, KNB2, KAF2, LP-PAN/K2 w/ Pre-amp, SignaLink USB -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-Remote-KPA100-Bias-Current-Adjustment-tp6350558p6354410.html Sent from the Elecraft mailing list archive at 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
