Can you use the same SWR bridge in the shack that you used at the base of the tower so you're comparing apples to apples? I'd take the K3 out of the equation and figure out why your SWR differs at the base of the tower compared to in the shack through a 75' coax run and switch.
I'd expect the SWR to be lower in the shack. If it isn't, then I'd put a dummy load at the base of the tower, thru the switch, and measure the SWR in the shack of that dummy load. Dick, K6KR -----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of [email protected] Sent: Tuesday, September 02, 2014 5:07 PM To: [email protected] Subject: [Elecraft] SWR Readings:Differences Good Evening, This is Mark Griffin, KB3Z and I have some questions regarding the SWR readings I get at my tower versus what I get on my K3. I will give the SWR readings that I got at my tower for a 40 meter rotatable dipole at 55 feet. Tower: 7000 2.2 7025 1.8 7050 1.5 7075 1.3 7100 1.0 7125 1.1 7150 1.3 7175 1.6 7200 2.0 7225 2.2 K3 Readings: 7000 3.5 7025 3.2 7050 2.9 7075 2.6 7100 2.4 7125 2.3 7150 2.4 7175 2.5 7200 2.6 7225 2.9 What would cause such a big difference. The cable run from my antenna switch on the tower to my K3 is only an additional 75 feet. I am using RG-213 cable. Is there anyway that I can test the SWR reading that my K3 is giving me? Mark Griffin, KB3Z ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
