[TenTec] Suggestions please

[Rick - NJ0IP / DJ0IP]

Guys, this is why I specifically stated to use a high quality 300 Ohm
feedline.
The Wireman sells stuff which uses stranded copperweld.  (Radio Works too).
It is a lot stronger than standard 300 Ohm TV twinlead.

73
Rick

-----Original Message-----
From: tentec-bounces at contesting.com [mailto:tentec-bounces at contesting.com]
On Behalf Of Dr. Gerald N. Johnson
Sent: Sunday, January 09, 2011 1:40 PM
To: tentec at contesting.com
Subject: Re: [TenTec] Suggestions please

I had more trouble with wind with TV twinlead over the past 39 years in 
central Iowa. Ice was harder on the 18 gauge copperweld open line. The 
wire simply snapped when a breeze flexed the feed line while encased in 
ice. Twisting the twinlead may have been a benefit to break up the 
airfoil lifts that made it flop in the wind.

73, Jerry, K0CQ

On 1/9/2011 12:34 PM, Rsoifer at aol.com wrote:
> Jerry,
>
> Iowa may be a worse environment for ice than New Jersey where I was at the
> time, but I had no problems with mechanical strength.  Of course, my
> feedline run was only 50 feet, pretty much straight up.
>
> 73 Ray W2RS
>
>
> In a message dated 1/9/2011 5:48:47 P.M. GMT Standard Time,
> geraldj at weather.net writes:
>
> But the  TV grade line needs help in the support department. 22 gauge
> copper wires  aren't strong enough to take the wind and ice load on the
> flat of the  insulation. I figure on punching holes every 6 or 8 inches
> and feeding an  insulating rope through them, probably take a turn around
> one or both  sides between passes through the holes to give more support
> and to break  up the airfoil. I might use parachute cord for that support
> rope. Then tie  the upper end to the center insulator and the lower end
> to some sort of  anchor before going to the feedthrough to get into the
> shack.
>
> 73,  Jerry, K0CQ
>
> On 1/9/2011 11:36 AM, Rsoifer at aol.com wrote:
>>   Tom,
>>
>> In a pinch, I have used Radio Shack's "heavy duty"  300-ohm twin-lead
with
>> power levels up to 500 watts.  No  problems.
>>
>> 73 Ray W2RS
>>
>>
>> In a message  dated 1/9/2011 5:07:40 P.M. GMT Standard Time,
>> xring97015 at gmail.com  writes:
>>
>> I have  been off the air for a while and am now  trying to get back up to
>> speed(cw  only here). I need to rebuild  my antenna and am curious what
> you
>> folks  recommend for a ladder  fed doublet- buy or build. Also I want to
>> reassess  my  tuner/balun set up. I know this is a gigantic can of worms
> and
>> has  been  hashed since the beginning.
>>
>> I use an OMNI VI and  only run 100 watts. I  do not have plans to install
> a
>> power  amplifier at this location. I am  looking for efficiency and need
> to
>> avoid causing interference as my home is  close to the  neighbors.
>> Thanks in advance for any suggestions.
>>
>>   Tom  Stewart N7ESE
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