[TenTec] openwire feed OT

[Ed Gilliland]

Hi Ken, I would like the info and also the parts to build a 1kw link 
coupled antenna coupler.  Prices?

Thanks, Ed/W5TM

K. Indart wrote:

>Chas,
>   If you  need details of those antenna couplers, let me know as I have the
>schematics and parts needed to build them.  I was around in those years, and
>earlier...
>
>Ken,  WA4RPH
>
>-----Original Message-----
>From: tentec-bounces at contesting.com [mailto:tentec-bounces at contesting.com]On
>Behalf Of Chas Nagel
>Sent: Tuesday, January 31, 2006 5:26 PM
>To: Discussion of Ten-Tec Equipment
>Subject: Re: [TenTec] openwire feed OT
>
>Antenna transmission lines are always a subject of great interest. You
>already have had some really good answers to your quiry below. In the 50's
>when I entered into ham radio the OT that was breaking me in constructed for
>me what was known at the time as an antenna coupler (now known mistakenly as
>antenna tuner). It consisted of a large 2-gang capacitor mounted with
>standoff insulators on a box which parallel tuned a coil with a center link
>installed in the middle. I remember later adding a capacitor in the link.
>The link was fed by 52 ohm coax from the rig. The coil assembly was plugged
>into the top. It's hard to explain the physical configuration but you can't
>buy most of the parts anymore anyway unless you are extremely lucky. Anyway,
>the balanced open wire line or 300 ohm line was connected to the coil using
>adjustable clips at optimum equal distances from each end of the coil until
>a match was obtained in conjunction with tuning the capacitor. I wish I
>still had that ma
> tching
> circuit but I don't think you can find it in any recent ARRL Handbook and
>the parts are quite scarce. The coupler provided both a means of preserving
>antenna balance and impedance matching. In those days there were many
>physical designs some of which even permitted both series and parallel
>feeder tuning. Just some history for you.
>
>  Enjoy.
>
>  Charles K0CW
>
>Paul DeWitte K9OT <k9ot at mhtc.net> wrote:
>  I would like to reopen the discussion on getting open wire into the shack.
>A while back there was quite a discussion on wheather to use a 4-1 or a 1-1
>balun when going to coax from open wire outside the shack and then running
>coax in to a tuner.
>
>No one mentioned just hooking the coax direct to the open wire without a
>balun.
>
>First I realize that you are going from balanced to unbalanced. How would
>this differ from feeding a dipole direct with coax and not using a balun at
>the feed point?
>
>I would like to put up a temporary loop and it is not feasable to run
>openwire in to the shack. But I would like to feed it with open wire from
>the loop to where it comes into the house (cheaper than buying more coax).
>So I am looking for suggestions.
>
>Since I am all T T it is only partly off topic.
>
>Thanks
>
>73 Paul K9OT
>
>
>
>
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