[Elecraft] KAT2 with EFHW antenna

[Ron D'Eau Claire]

But, on the positive side, that very high impedance means an unusually
efficient antenna since there is almost no ground current flowing at all. 

I use a setup like that at my home station - 1/2 wavelength long wire on 80
meters - with a homebrew manual L-network. Does a great job. 

One reason why small auto-tuners cannot handle that huge impedance is
because of the voltages involved. Thousands of volts commonly exist even
with fairly low power. The capacitors and inductors in most automatic tuners
simply aren't rated for that.

Ron AC7AC 

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of David Gilbert
Sent: Tuesday, August 23, 2011 4:20 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] KAT2 with EFHW antenna


The simple answer to your question is "no".  An end fed halfwave would 
theoretically present a few thousand ohms to your feedline, giving you 
an SWR of several tens to one.

Consider this .... it is likely that the tuner with the greater loss 
will more easily give you a "match" to a difficult load.

73,
Dave   AB7E