[Elecraft] kat2 questions again

[Don Wilhelm]

John,

Whether or not adding a tuner will cause significant losses depends on your
antenna system configuration.  In any case, one must find some way to create
a 50 ohm impedance for the transceiver to work into or it will throttle back
the power to protect itself.

The ideal situation is to match the antenna to the feedline at the antenna
feedpoint AND match the feedline impedance to the transceiver output in the
shack.  With a matched 50 ohm feedline, no addiitional matching will be
required in the shack as long as one does not stray far from the antenna
system design frequency - but on the lower bands, that may be a small window
for many antenna designs - although broadbanding techniques can be used.

Now that you have the long answer, the short one is YES, most any matching
arrangement will cause some loss.  How much loss depends on a lot of factors
and only a few were mentioned above.  Take a look at the antenna,
transmission line, tuner article on my website www.qsl.net/w3fpr for some
additional information - it does not give formulas and specifics, but
presents general concepts, I think you will find it quite readable.

73,
Don W3FPR


----- Original Message ----- 

One last thing on my KAT2 and KAT100 Ive been told that if you use a tuner
on an antenna you will lose some db in your signal is this true and is it
enough to bother trying for a resonant antenna versus just using the tuner
which I dont seem to have any problems, nobody complains.