The RF Connection also carries 300 ohm ladder line. Walt Maxwell uses
300 ohm line feeding a 130 foot dipole on all HF bands.
Bob WB2VUF
On 1/9/2011 3:13 PM, Rick - NJ0IP / DJ0IP wrote:
> 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@contesting.com [mailto:tentec-bounces@contesting.com]
> On Behalf Of Dr. Gerald N. Johnson
> Sent: Sunday, January 09, 2011 1:40 PM
> To: tentec@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@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@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@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@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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>>>
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