Buck wrote:
( Not to argue with you, but I considered your feedline switches a
form of tuner, just not conventional .

More precisely, a form of tuned feeders.

One thing I didn't find about the antenna was the bandwidth of 40/80
meters or an SWR chart for each band. (I realize that you might not be
able to do that easily, I'm just stating an observation.)

The HF bandwidth of that antenna *plus* the tuned feeders is 27
MHz, all the way from 3 to 30 MHz with an SWR of less than 2:1
(for the ham bands). I haven't measured the SWR outside of the
ham bands. There's a graphic that shows the SWR=2:1 bandwidth
for 40m to be about 160 kHz for a fixed length of ladder-line.
--
73, Cecil http://www.qsl.net/w5dxp


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On Mon, 31 Jan 2005 12:24:20 -0600, Cecil Moore
wrote:

Buck wrote:
( Not to argue with you, but I considered your feedline switches a
form of tuner, just not conventional .

More precisely, a form of tuned feeders.

One thing I didn't find about the antenna was the bandwidth of 40/80
meters or an SWR chart for each band. (I realize that you might not be
able to do that easily, I'm just stating an observation.)

The HF bandwidth of that antenna *plus* the tuned feeders is 27
MHz, all the way from 3 to 30 MHz with an SWR of less than 2:1
(for the ham bands). I haven't measured the SWR outside of the
ham bands. There's a graphic that shows the SWR=2:1 bandwidth
for 40m to be about 160 kHz for a fixed length of ladder-line.


how much RF is in the shack when you use your system?


--
73 for now
Buck
N4PGW

Buck wrote:

Cecil Moore wrote:
The HF bandwidth of that antenna *plus* the tuned feeders is 27
MHz, all the way from 3 to 30 MHz with an SWR of less than 2:1
(for the ham bands). I haven't measured the SWR outside of the
ham bands. There's a graphic that shows the SWR=2:1 bandwidth
for 40m to be about 160 kHz for a fixed length of ladder-line.

how much RF is in the shack when you use your system?

The ladder-line comes off at right angles to the balanced
dipole so common-mode current is minimum and is choked
on the transmitter side of the ladder-line length selector.

Balanced currents don't cause "RF in the shack". If the
currents are unbalanced, RF in the shack is likely with
either coax or balanced line.
--
73, Cecil http://www.qsl.net/w5dxp


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