Another answer for Darrell, is that a balun is designed to see equal antenna halves either side of it. (on its balanced side).
There is no advantage to using one on an end fed dipole. If you were to feed with coax, to an end fed dipole, and that coax is quarter wave long, you would transform the high impedance of around 3000 ohms at the end of dipole to something lower at the other end of coax. But, because the coax is low impedance and the dipole end is high, you would have a lot of feedline loss from The SWR reflections. That is the reason, low loss (with high SWR) parallel high impedance lines like ladder line or open wires are used to feed end fed dipoles. You use a link at the tuner to couple to such lines. The tuner has a tank coil and capacitor to tune it to each band of use. The link has fewer turns than the LC tank, but can also have a cap for tuning. If you had any RF issues on the tuner metal case, you could try a 1:1 cable choke formed by ferrite beads strung on a short coax, and that would then couple to the balanced line, if you were not using link coupling to the radio tuner. However, use of the link and the isolation it affords, also reduces the pickup of suburban electrical noise. Stuart K5KVH _______________________________________________ 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
