Posted by
Cookie on
Jul 13, 2011; 3:21pm
URL: http://elecraft.85.s1.nabble.com/KPA500-and-KAT500-Ports-tp6574422p6579427.html
Brian, would you list for us the multi-band antennas you know that can cover all
of several bands with a SWR that will allow full power from the K3 without using
some sort of variable matching mechanism? Of course the SteppIR will do it, but
it has its own variable matching mechanism built in and is very likely much more
expensive than a KAT-500 is likely to be priced. Most Tri-banders have CW and
Phone settings. Most all band verticals will only match 75 KHz or so on 80 or
75 meters and all band dipoles maybe 150 or 200 KHz. G5RVs are difinitely
candidates for matching devices.
Of course, some manufacturers offer products with a built in matching network
that is low Q enough that it appears to have a very wide bandwidth.
Unfortunately these seem to dissapate most of the power in the matching
network. We all know that contacts can be made with very low power radiated.
But no one that I know favors putting out 100 or 500 watts to radiate 5 watts or
less and heat the antenna matcher with the rest.
Joel Hallas, W1ZR has a very nice explanation of why and how Antenna Tuners on
pages 52 and 53 of the August 2011 QST in his "Getting on the Air" column.
Willis 'Cookie' Cooke
K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart
________________________________
From: Brian Alsop <
[hidden email]>
To:
[hidden email]
Sent: Wed, July 13, 2011 4:58:41 AM
Subject: Re: [Elecraft] KPA500 and KAT500 Ports
How about taking the money you'd spend for the KAT500 and put it towards
antenna(s) that don't need a tuner? There are lots of multiband
antennas out there. Some cost less than the likely cost of a KAT500.
73 de Brian/K3KO
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