When I first built K2 #4429 in the fall of '04 I was very careful with the winding/installation of T2 (following the App note on the Elecraft web site) in order to get full 10w out on 10m. My recollection is that I was able to get at least 10w at 28.0 MHz, and like 9.8w at 28.8 MHz, which I could live with, and made no further changes.
This week I was performing the power control mod (R98) and noticed that I was only getting a maximum of 7.5w at 28.8 MHz. While performing this mod, I had my completed, but un-installed KPA100 in line, and I thought maybe there was a difference in power output measurement between the base K2 and the K2/100, so I completely disconnected the KPA100, and replaced R98 with the original resistor to re-measure output on 28.8 MHz, getting again 7.5w or so. The only changes I've made since my original build/alignment is the addition of a K6XX/N0SS zero beat indicator, addition of the K160RX module, addition of 1 capacitor in VCO area to bring VCO voltages into correct ranges after the addition of K160RX, and the addition of the RF/12V connectors for the KPA100. I wonder what might have changed to lower the 10m output? -Ben K1NT _______________________________________________ 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
