+++++++++++++++++ From: "Ed Long" To: Date: Mon, 2 Sep 2002 07:33:31 -0700 Subject: [Elecraft] K2 #2078 Deaf on 20M - OK on all other bands Everyone, Tom Hammond suggested I post this: I found out why I was not getting receiver performance on 20M and great p= erformance on all other bands. It was not a hardware problem at all, rela= ys and all that. It was pilot error as usual. I have the 160M option. I had inadvertently set RANT (separate receiver a= ntenna) to ON for 20M. Still don't know how I did that. Each band has th= e capability of using the RANT separately. So, I changed RANT to OFF in t= he menu and 20M now works just fine. The radio was looking for an antenna= on the 160M board instead of through the normal antenna connector (I hav= e the tuner option too, which is great BTW!). I found the problem using Tom's signal tracing approach and found that ap= plying the antenna backwards through the radio worked to isolate the prob= lem to the 160M option board. Then I read the manual and figured out that= the receive antenna can be selected independently for each band. Well, l= ight bulbs finally came on. Everything works great now. As I said, pilot error! No hardware problems.= Hopefully this will help someone someday. 72/73, Ed Long WA4SWJ Peoria, AZ ++++++++++++++++ From: "Dave" To: Cc: Subject: Re: [Elecraft] K2 deaf on 20m, other bands OK Date: Mon, 2 Sep 2002 17:21:20 +0100 Chris I had this problem with my K2. The transmit power seemed OK, but when I = obtained a signal generator and checked the S-Meter sensitivity it = became apparent the K2 was less sensitive on 20m compared with other = bands. There is a modification on the Elecraft web site, it comprises = adding a 10pF capacitor across each of the trimmers. The web site = suggests the problem is low power output, but for me the power out = seemed OK, it was just the low sensitivity. If you have a couple of 10pF capacitors it's very easy to check if this = is the problem. 73's Dave, G4AON K2 # 1892, K1 # 1154 +++++++++++++++++++ From: "Christoph Rheker" To: Date: Mon, 2 Sep 2002 22:47:17 +0200 Subject: [Elecraft] K2 deaf on 20m, other bands OK - solved Thanks agn for the replies. Turning C21 and C23 10 times and then re-adjusting per the book did help! Now the little box receives muuuuch better..-) First thing heard on 20m was the VE8AT beacon.... 73 de Chris, DL4YAO ++++++++++++++++++