[Elecraft] K2 EXCESSIVE PREAMP NOISE?

2013-08-20 Thread Pdn0528
I've been wondering about this for awhile and would like to get some opinions. When I switch in the K2 preamp, I get a substantial increase in noisenot band noise...I'm talking about no antenna connected. I haven't measured it as yet, but the noise increase is great enough to make me suspect I

[Elecraft] K2 adjusting L34

2013-08-15 Thread Pdn0528
I know there has been lots of discussion but I just made a change which solved everything. I noticed that the peak was at the top most rotation of L34, so I changed C182 from 180pf to 120 pf (npo). Now, using an external sig gen, not the 7k birdie, there is a pronounced peak about halfway down L34.