On Fri, 18 Aug 2006, [EMAIL PROTECTED] wrote:
In a message dated 1/12/06 8:31:16 AM, [EMAIL PROTECTED] writes:
On Wed, 11 Jan 2006, [EMAIL PROTECTED] wrote:
Quick and dirty, just try grounding one side of your ladder-line at the
input
end and feeding the other side off the single ended output of your ATU and
see what happens.?? SWR figures might be better (but could also be worse).
John,
Did you ever try this? If so, what were the results?
Yes, I did - results not good at all, antenna would not tune and the
Transmitter complained at me bitterly... ;} I also built in a DPDT
knife switch in the feedline after the tuner - it's mainly for grounding
during t-storms, but I played around with various (semi-calculated) values
of capacitors and coils... on 10 meters the use of various paralelled
caps made improvements, but tuning became very critical, and there's
nothing much that interests me up there - I *do* like to work 20M RTTY ,
and have yet to try PSK32 into the Valiant.
I'm still gathering facts, and the Listmembers have been quite helpful -
everyone likes the Palstars, but the big Ten-Tec also has impressive
specs.... I intend on converting a broadcast transmitter for use in the
shack, so the Tuner needs to be able to withstand 100% duty-cycle at
Legal Limit. Ultimately I'll tune the feedpoint of the antenna itself,
and just run 50-ohm line from the transmitter out to the "doghouse" if you
will.
Cheers
John KB6SCO
Who just shut the rigs off after a nice AM QSO on 80....
