[Elecraft] The use of a doublet

[Dave Van Wallaghen]

I'm using a 66' doublet fed with homebrew ladder line for portable 
operations in my yard. I have it flat top up in a tree about 35' up. I 
made a small adapter to go from the ANT1 connector from my KAT3 to a 
couple of banana sockets. I then bring the ladder line straight into 
that adapter.

I wound up with a feedline length of around 55' and the KAT3 tunes up on 
this arrangement 80m-10m FB. It is obviously very short for 80m and I 
don't use it on that band, but the KAT3 did tune up on it (I'm sure not 
very efficiently).

I've been running 5 watts out there and worked a number of states. I 
worked Italy on 5 watts last summer on 20m.

I hooked the doublet directly to the KAT3 at the urging of Ron (AC7AC) 
and Don (W3FPR) here on the list and have been very happy with it.


73,
Dave W8FGU


THOMAS BRERETON wrote:
> I have long been an advocate of the center fed doublet.
> I have put them up in numerous state and even in Germany.
> Of course I have used different tuners. Folks here in this
> write about of all kinds of external tuners.
> 
> May I make a radical suggestion? Use the internal K3 
> antenna tuner! Now I know that most transceivers have 
> internal tuners that will operate well only up to 3:1 swr.
> The K3 tuner is rated much higher than that. Indeed, 
> I was very surprised how well it  works here in my station
> with my 135' foot dipole with 450 ohm ladder line and a
> balun.
> I highly recommend that one should consider the K3 tuner.
> It's a winner.
> 
> Tom Brereton, W0TOM
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