Maybe, for your line length, the 4:1 transformation is putting the
feedline input Z out of range of the K1 tuner on 40 and 30. It might
be fun to try switching to a 1:1 balun (or no balun at all) to just to
see what happens... since it's so easy to do. Beyond that,
experimenting with feedline length seems like the next step.
Bob NW8L
On 6/21/06, Randy Moore <[EMAIL PROTECTED]> wrote:
Just completed my KAT1 for my K1 that I finished last night. All the tests
seem to work properly, and I get a r1.0 (SWR of 1.0) on all 4 bands (7, 10,
14, & 21 MHz) when transmitting into a dummy load. However, when
transmitting into my attic dipole the KAT1 can only achieve a match on 14
and 21 MHz (1.3 and 1.2 respectively). On 7 MHz I get r4.1 as best match,
and on 10 MHz I get r3.2, both after much rattling of relays. My K2 (which
I realize has a greater matching range) has no trouble with the same antenna
setup.
The rigs are connected with about 2 ft. of RG58 to a 4:1 LDG balun, then to
maybe 30-40 ft. of 450 ohm ladder line out into the attic where I have a
40m. 1/4 wave dipole with the center at the peak of the roof and the ends
drooped down in random ways to fit the available space.
When I adjusted C9, by the way, I got a null of about 0.06 mv.
As I said, I've been through all the tests on the KAT1, including trying
each L and C individually to make sure they are all working, and everything
looks good. So I'm guessing I have to do something to the antenna to get
make things work. Perhaps play with the length of ladder line? Any
suggestions would be welcome.
73,
Randy, KS4L
_______________________________________________
Elecraft mailing list
Post to: [email protected]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
_______________________________________________
Elecraft mailing list
Post to: [email protected]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
