Re: Tuner ranges

Posted by Vic Rosenthal on May 24, 2018; 8:05am
URL: http://elecraft.85.s1.nabble.com/Tuner-ranges-tp7641137p7641139.html

I believe that the K3 tuner does have more range than the one in the KAT500.

My experience with this kind of system (tuner -> balun -> open wire
line) is that the 1:1 balun works much better from the point of view of
losses and choking off RF in the shack.

What do you mean that the 4:1 balun has less range on 160 than the 1:1?
If you are saying that the SWR curve is broader, then that could just be
because of losses in the balun.

73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/

On 24/05/2018 6:49, Michael K Bottles wrote:

> Is the tuner range of the K-3 and the KAT-500 the same?
> They seem to tune the same antenna differently, (of course the K-3 is tuning through a bit more coax with both the KAT-500 and KPA-500 on standby.)
> They are tuning a 250’ Doublet via a short coax run (10’) to an external 4:1 current Balun, then via true 600 ohm open ladder line.
> (I tried a 1:1 Balun, but it did not have as great a range on 160 as using the 4:1.)
> The K-3 seems to have a bit more range than the KAT-500.
> Is that to be expected?
> 73
> Kim - K7IM
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