Thanks Gary, I redid the power calibration and the tuner tunes the dummy load all ok. It still struggled with the 40 dipole (native swr, as measured by the K3, is 1.6:1) and would only get a match of 1.4:1. But I put in a short length of coax as you suggested and now it can find a 1.1:1 match, although still with some struggle. No external switches, wattmeter etc. Thanks, Fred
________________________________ From: Gary Surrency [mailto:[EMAIL PROTECTED] Sent: Monday, September 29, 2008 2:43 PM To: [EMAIL PROTECTED] Subject: KE7X RE: [Elecraft] KAT3 Problem Hi Fred, Can you try a slightly different length of feedline to see if that helps the tuner find a better match? Just add or remove a length of coax if that is possible. Be sure the screws in the KAT3 and ANT1, ANT2 connectors are all very tight. Try a different ground connection too, and the K3 is connected as directly to the antenna as possible (no external antenna switches, SWR or wattmeters, etc.). Try lower power levels too (the tuner always uses 5w or less when it operates). Make sure the antenna and feedline has no bad connections, and use a SWR analyzer to check its match if you have one such as the MFJ-259B. If a powerful AM, FM, TV, or pager antenna is nearby, it might be affecting the tuner's operation on the antenna. -- 73, Gary AB7MY ========= [EMAIL PROTECTED] Elecraft Technical Support Hi, -----Original Message----- From: "Cady, Fred" <[EMAIL PROTECTED]> <mailto:[EMAIL PROTECTED]> Date: Monday, Sep 29, 2008 6:28 am Subject: RE: [Elecraft] KAT3 Problem To: <[EMAIL PROTECTED]> <mailto:[EMAIL PROTECTED]> Thanks Tom. Been there done that and that's what it acts like but the ant selection is OK. I can bypass the atu and it sees the dummy load fine. Would there be any filters or anything that are used on 7 and 24 only? Thanks, Fred -----Original Message----- From: Tom Hammond [mailto:[EMAIL PROTECTED] Sent: Monday, September 29, 2008 3:04 AM To: Cady, Fred Subject: Re: [Elecraft] KAT3 Problem Fred: Double check that you somehow didn't manage to get ANT2 set as the default antenna selection for those bands... if so, you're probably tuning into NO ANTENNA...! 73, Tom N0SS At 21:48 09/28/2008, you wrote: Hi, Just getting K3 going and KAT3 does not tune properly on 7 and 24 MHz. I'm pretty sure it worked earlier today on a 40 m dipole I put up but now it doesn't tune the dipole or a dummy load. When trying to tune the dummy load and checking the L & C I get Ca = Ct=0.66 nF and L=0.75 uH and 2.5:1 SWR. If I change Ca = 0.04 nF and L = 0.1 uH I get 1.0:1 but when hitting tune again the KAT3 goes back to the previous 2.5:1 settings. All other bands except 24 MHz seem ok. Any thoughts? Thanks, KE7X Fred Cady Fcady at ieee dot org This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. _______________________________________________ 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 This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. _______________________________________________ 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 This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail.
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