"Jerry Martes" wrote in message
news:8ZPWc.2585$9P.466@trnddc04...
It may not be an answer to your question, but, 4 lengths of 75 ohm coax
connected in series and parallel would result in 75 ohms, balanced. Two
50
ohm coax cables "paralleled" could provide 100 ohms balanced with the
center
conductors used as the balanced line.

Jerry

I posted the same answer in his 'found' thread - but I wasn't sure if my
memory was in correct operating order. At least your post gives me hope that
my memory hasn't completely left me. :-)

I've used that scheme to make matching sections a few years back. 75-ohm
cable comes in handy a lot of times.




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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


"Hal Rosser" wrote in message
...

"Jerry Martes" wrote in message
news:8ZPWc.2585$9P.466@trnddc04...
It may not be an answer to your question, but, 4 lengths of 75 ohm
coax
connected in series and parallel would result in 75 ohms, balanced.
Two
50
ohm coax cables "paralleled" could provide 100 ohms balanced with the
center
conductors used as the balanced line.

Jerry

I posted the same answer in his 'found' thread - but I wasn't sure if my
memory was in correct operating order. At least your post gives me hope
that
my memory hasn't completely left me. :-)

I've used that scheme to make matching sections a few years back. 75-ohm
cable comes in handy a lot of times.




---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.732 / Virus Database: 486 - Release Date: 7/30/2004

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

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