[Elecraft] KAT2 with EFHW antenna
Bill W4ZV
btippett at alum.mit.edu
Tue Aug 23 19:18:32 EDT 2011
Phillip Shepard wrote:
> I put it in ALT mode, and it spent a
> long time searching before it got down to between 3:1 and 4:1, depending
> on
> the 20m frequency. I added about 2" of wire to the antenna, and the tuer
> got down to about 2:1 to 2.5:1. I added another foot of wire (now 36'),
> and
> it got down to about 1.5:1. Five or six feet added yielded a perfect
> match
> (1:1). So I now have a 39' wire for 20m use.
>
> Is this normal? Should the KAT2 be able to more easily match the 33'
> halfwave antenna? Thank you.
>
Probably normal. End-fed half-wave antennas are 4-5000 ohms impedance, so
you're asking the tuner to match an 80-100:1 SWR which is beyond the range
of most tuners.
73, Bill
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