In a message dated 12/5/2008 9:05:02 A.M. Pacific Standard Time, [EMAIL PROTECTED] writes: I'm running the K3 with an Ameritron AL800 and a Steppir 3 element with 40m dipole add-on. I have a severe though intermittent feedback problem on 40m that I did not have with an Icom 751a. The feedback only occurs when I'm using the amp (even with very low drive). I've common core choked virtually every lead with ultimately no luck. I'm using the Elecraft hand mike. Is there a known problem here? Otherwise, I'll just keep searching.
Dick Dick Lindzen, KA1SA 301 Lake Avenue Newton, MA 02461 USA 1-617-332-4342 _______________________________________________ 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_ (http://www.elecraft.com) ++++++++++++++++++++++++++++++++++++++++++++++++++ Have you tried other bands? What Version Firmware are you using? I have a problem that may also be RF feedback related. I occurs only on 40M and only when I exceed 80 W to my Dipole antenna. No problem full power up to 120 watts into Vertical or any other band. Problem started immediately after upgrading FW to V 2.46. I have a couple upgrades to do on the rig including the AGC upgrade, which I have held off making until my Sub Receiver upgrade. Since that arrived a few days ago I will be doing all upgrades and the subreceiver install this weekend. I don't plan on any changes in FW other than activating the KRX3. I will then test the 40M issue. I do not have a good earth ground on the K3 nor am I running any form of Amp. But, the rig has worked perfectly since it was installed a year ago and the ATUs have always provided a good match in the 1.X:1 range on both Vert and Dipole including 160M, 30M, 12M, 17M in addition to the usual 5 bands the Ants are designed for. Al WA6VNN **************Make your life easier with all your friends, email, and favorite sites in one place. Try it now. (http://www.aol.com/?optin=new-dp&icid=aolcom40vanity&ncid=emlcntaolcom00000010) _______________________________________________ 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
