Hi All, Here's a proper radio question.
I'm still learning about this so apologies for any gaffs. I have an Elecraft K2 (with which I'm extremely happy) running into a full size G5RV. The G5RV consists of a horizontal dipole with an impedance matching ladder line dropped from the centre. It currently terminates in a BNC connector and thence to a length of 50 ohm co-ax to the transceiver. It works tolerably well on 40 but is hopeless on other bands. I'm uncomfortable about going from the unbalanced co-ax straight into the ladder line without a balun though it's more intuition than having done the sums. I'm mean and impecunious so I want to use what I have to hand. I have an ex-military ATU built by Redifon. This takes a 50 ohm unbalanced co-ax feed and matches to an arbitrary dipole. BNC connector on the front, two terminals on the back for the antennae and a further terminal for a ground stake. Of course the best place for the ATU would be at the base of the antenna but this is impracticable so the ATU must reside in the shack. I'm only using 10W so I want as much of the transmitter power to be coupled to the antenna and waste as little as possible in the feeds. My guess at the moment is that what I need to do is to connect the 50 ohm output of theK2 into the ATU, take the ATU outputs and feed into a balun to drive the coax feed and then have a further balun at the base of the G5RV to match to the antenna. Does this sound sensible or am I completely barmy? Paul M3CRQ _______________________________________________ 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
