[Elecraft] Thoughts on internal vs external ATU for K3

[Ignacy]

It depends on whether the antenna is badly out of balance and whether it is
low or high impedance. 

With coax based antenna and when the balun is not required, KAT3 is very
convenient. When one uses unbalanced high SWR antennas fed by ladderline or
TV line, one needs an efficient current balun. For high impedance antennas,
some baluns including BL2 have very high losses. In fact, KAT3 can match BL2
without any antenna; the toroid gets hot fast.

With an outside tuner, a jumper of RG174 between K3 and a tuner looped a few
times on a toroid makes a very effective low loss balun.   

Ignacy, NO9E
-- 
View this message in context: http://n2.nabble.com/Thoughts-on-internal-vs-external-ATU-for-K3-tp4627735p4628321.html
Sent from the [K3] mailing list archive at Nabble.com.