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Search: Posts Made By: thom
Forum: Antennas 1-Sep-2012, 6:34 PM
Replies: 18
Views: 44,188
Posted By thom
Thanks, makes sense. So I should be able to...

Thanks, makes sense.

So I should be able to measure the impedance on the notional DB8e with multimeter contacts on the points where the balun/transformer would attach?

(and likewise with a...
Forum: Antennas 1-Sep-2012, 3:17 PM
Replies: 18
Views: 44,188
Posted By thom
No kidding, a TV-2900 would do the job? By...

No kidding, a TV-2900 would do the job?

By 'matching impedances' do you mean between the two antennas? How does one go about that?
Forum: Antennas 1-Sep-2012, 1:25 AM
Replies: 18
Views: 44,188
Posted By thom
So if I read you right, to get a bona fide DB8e,...

So if I read you right, to get a bona fide DB8e, I need to pull off the baluns, put the DB4e's side by side and tie them together with lateral transmissions lines of equal length, and put a balun in...
Forum: Antennas 23-Aug-2012, 3:33 PM
Replies: 18
Views: 44,188
Posted By thom
Thanks again for the info; I appreciate the...

Thanks again for the info; I appreciate the feedback. You've hit upon the one thing I consistently find divergent information about. I completely understand that a theoretically perfect splitter...
Forum: Antennas 23-Aug-2012, 4:19 AM
Replies: 18
Views: 44,188
Posted By thom
Two DB4e's on the same heading, identical length...

Two DB4e's on the same heading, identical length coax to a Perfect Vision PV22233 combiner, then onto a PA-19 preamp. Looking for increased gain, but if what kyes says is correct, they've been too...
Forum: Antennas 22-Aug-2012, 4:07 PM
Replies: 18
Views: 44,188
Posted By thom
Thanks for the advice. It looks like there is...

Thanks for the advice. It looks like there is some conflict on optimal spacing between kyes and tonercable. One says 2/3 wavelength the other says .94.

http://www.kyes.com/antenna/stackluge.html...
Forum: Antennas 21-Aug-2012, 12:08 AM
Replies: 18
Views: 44,188
Posted By thom
distance for bay

for bay antennas on the same mast, do you measure the distance from the centers or from the lower edge of the upper to the upper edge of the lower? (or something else?)
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