Gerald, The specs for the GP10-40 call for use of the transceiver's ATU (Antenna Tuning Unit). If you have an ATU in your K3 you should have no problem with it providing a proper match to the transmitter with the SWR measurements that you mention in your note. They quote using a 100 foot long run which you have. They also imply in the specs that if a shorter line (75 ft) is used, a wider range tuner would be needed.
Do you have an ATU in your K3? If so, make sure that it is not in BYPASS mode (Hold the ATU button to change it) then tap the ATU TUNE button and it should easily make the K3 happy with the load that it sees. If you don't have the internal K3 ATU, then you will either need to install one or use an external antenna tuner to provide the proper match for the K3. 73, Rich - K1HTV = = = -----Original Message----- From: KC6CNN [mailto:[email protected]] Sent: Sunday, March 11, 2012 11:48 AM To: [email protected] Subject: [Elecraft] Strange Vertical - need help I installed a vertical with ground radial kit up 20 feet. The antenna mast and negative sheild connector is grounded to a ground rod. The antenna covers 10 to 40 meters. I can tune 10 meters fine, and fourty meters fine, but 12,15,17,20,and 30 will not tune and SWR are high. here are the SWR reading taken on AM running 25 watts. 10 meter 2804550 is 2 to 1 SWR 2882000 is 1.5 to 1 SWR 12 meter 2490000 is 3 to 1 SWR 24990 is 3 to 1 SWR 15 meter 2103900 is 4 to 1 SWR top porting is 3 to 1 SWR 17 meter 1809000 is 3 to 1 SWR 1817000 is 2 to 1 SWR 20 meter 1402800 is 2 to 1 SWR 1430000 is 2 to 1 SWR 30 meter 1010500 is 4 to 1 SWR 1014000 is 4 to 1 SWR 40 meter 7026 is 2 to 1 SWR 7290 is 1.5 to 1 SWR Any help or suggestions would be greatly appreciated. I will be receiving my K3 on Tuesday and am trying to get this antenna sorted out before then. Oh yea the rig I'm using right now is a Kenwood 570, the Coax is LMR400 with a 100' run. the Antenna is a ZeroFive GP10-40. Thank you Gerald Manthey KC6CNN -- View this message in context: http://elecraft.365791.n2.nabble.com/Strange-Vertical-need-help-tp7363205p736320 5.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ 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
