Hal

Yeah, the idea does work. I am using two 'side by side' RG223s right
now
to evaluate a dipole antenna I'm playing with. For my purpose, the 70 ohm
dipole on the 100 ohm line is a good enough match.

Jerry

and as Roy pointed out in the other thread - the assembly will just
facilitate the transmission of a balanced load - not 'cause it' to be
balanced -
But as you pointed out - using such an assembly aids in impedence matching
schemes - and if the line happens to be balanced - it won't tip over . ;-)



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"Hal Rosser" wrote in message
. ..
Hal

Yeah, the idea does work. I am using two 'side by side' RG223s right
now
to evaluate a dipole antenna I'm playing with. For my purpose, the 70
ohm
dipole on the 100 ohm line is a good enough match.

Jerry

and as Roy pointed out in the other thread - the assembly will just
facilitate the transmission of a balanced load - not 'cause it' to be
balanced -
But as you pointed out - using such an assembly aids in impedence matching
schemes - and if the line happens to be balanced - it won't tip over .
;-)


And -- Use of a balanced line to feed a ballanced antenna allows a balun
to be located where it may be of a lesser disturbance when it is not a
perfect balun.

Jerry

450 ohm is often preferred for multiband antennas. But 72 ohm is available in
the US, can't remember if Davis RF, RadioWorks, or who that carries it.

On 25 Aug 2004 01:03:32 GMT, (K9SQG) wrote:

450 ohm is often preferred for multiband antennas. But 72 ohm is available in
the US, can't remember if Davis RF, RadioWorks, or who that carries it.

None of the usual suppliers carry anything but 300 & 450 ohm line
nowadays. I suspect the 75 ohm isn't made anymore -- it's pictured in
my 1985 arrl handbook, but nothing more recent. (The stuff is real
skinny -- about like zipcord.)

bob
k5qwg

E-mail ComTek: to see if they still have any 72
ohm twinlead left; was .20c/ft.
GL,
Jim

"Micro MegaWatt" wrote in message news:uvHWc.131575$sh.83524@fed1read06...
Had an E-Mail as to where to buy ladder line -- 72 or 75 ohm for antenna
feeder

Understand it is scarce in the USA but may be available in the UK

Sources anyone? thanks