[Elecraft] Weird Problem with rcvr sensitivity
Good Evening Group, I believe I have seen this problem, but I cannot remember the solution. K2/100 (4991, all mods). Above 70 w, and after a short string of dits and dahs - maybe like a CQ, the receiver comes back about 15 dB down from where it was. Very noticeable. After a random string of dits and dahs, it comes back up. I've tried this with all manner of settings of AGC, DSP, noise filters etc. etc. Can't find anything that contributes to the problem except power. The antenna is resonate, but I do have KAT100 in the line. Everything works perfectly below 70 (or so) watts. Anybody remember the solution? Thanks, es 73 Tom, KJ3D ___ 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
[Elecraft] Weird Problem with rcvr sensitivity - more
Thanks, John... but it's not a bad connector. I have also confirmed that the KAT100 is not the problem, and it occurs on SSB as well as CW. It is also not confined to >75 watts, seems to happen just about anywhere above 10 watts. I'm just sure I read about someone else having this problem, I sure hope he reads this. Tom. kj3d From: John [mailto:[EMAIL PROTECTED] Sent: Thursday, June 21, 2007 6:27 PM To: KJ3D Subject: Re: [Elecraft] Weird Problem with rcvr sensitivity Hi Tom, Check your coax connectors, could be a little corrosion. I've had it happen to me several times over the years. John k7up -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of KJ3D Sent: Thursday, June 21, 2007 6:14 PM To: 'Elecraft Discussion List' Subject: [Elecraft] Weird Problem with rcvr sensitivity Good Evening Group, I believe I have seen this problem, but I cannot remember the solution. K2/100 (4991, all mods). Above 70 w, and after a short string of dits and dahs - maybe like a CQ, the receiver comes back about 15 dB down from where it was. Very noticeable. After a random string of dits and dahs, it comes back up. I've tried this with all manner of settings of AGC, DSP, noise filters etc. etc. Can't find anything that contributes to the problem except power. The antenna is resonate, but I do have KAT100 in the line. Everything works perfectly below 70 (or so) watts. Anybody remember the solution? Thanks, es 73 Tom, KJ3D ___ 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 ___ 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
Re: [Elecraft] Weird Problem with rcvr sensitivity - more
Tom, Quite some time ago I had a problem with my K2/100's receiver, its sensitivity would sometimes get poorer on 40m after transmitting. I eventually found in my case that relay K1A's contacts had become "dirty", which can (but not often) happen with that type of relay. When you next have the problem, rather than transmitting another string of dits try switching to the next higher or lower band and back again without transmitting. If the receiver's sensitivity then returns to normal at once or after a few attempts I would suspect a relay that is in the signal path. Please let me know how you make out. 73, Geoff GM4ESD PS Please bear with me if I am slow to answer. Tom KJ3D wrote: but it's not a bad connector. I have also confirmed that the KAT100 is not the problem, and it occurs on SSB as well as CW. It is also not confined to 75 watts, seems to happen just about anywhere above 10 watts. I'm just sure I read about someone else having this problem, I sure hope he reads this. Tom. kj3d ___ 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
