Hello, 8,8m could be a good length for your pole to tune from 40-6 m. It is important to avoid the half wave lengths and its harmonics on the operating frequency because it will produce a very high ( kiloohms) impedance which normal tuner won't tune. Unless you go onpurpously for a 1/2 lambda monoband antenna. It is very effective , needs a very short counterpoise but you need to have special tuner, even the simpliest one made of a coil and a variable cap. If you want multiband with a internal tuner, the mentioned length is ok for all bands. There is many I more good lengths , you may google it on the net. I use 8,8m + 8,8m of couterpoise on the ground with my KX2 tuner for the outings and I have a 43m end fed wire for a fixed 160-6 m operation at home with multiple quarter wave radials on the roof. 73 Linas LY2H
<<<To: Elecraft Reflector <[email protected]> Cc: Bcc: Date: Sun, 7 May 2017 10:24:14 +0300 Subject: [Elecraft] Good length for portable antenna I'm taking my K2/10 to a school on Wednesday to do a demonstration. I have a 10m fiberglass pole, and my plan is to hook a wire to it and either lean it against something or bungee-cord tie it to a bike rack or whatever is there. I will deploy a counterpoise wire on the ground. Given that it is the middle of the day, I will probably try 20 or 17m,>>> ______________________________________________________________ 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]
