Re: Topband: 300 ohm twin lead for bidirectional Beverage antennas

[Artek Manuals <Manuals@ArtekManuals.com>]

Since the relevant portion of the original post was not quoted not sure 
what the original problem was ....but
If your looking for an "easy" and reliable solution for a bi-directional 
beverage in a single run so to speak, look at a copy of "The Beverage 
Antenna Handbook" by Misek. He shows a Coaxial version ( I use RG6 but 
will likely be switching to a RG58/59 variant in the future) . The 
coaxial version shown by Misek can actually be fed anywhere along the 
antenna ( including an end) and need not be fed in the center without 
compromise. I have three here (a 460' Beverage and two 200' BOGs) 
Pointing at various compass points (N/S, NE/SW AND E/W). The beauty of 
the coaxial version is that it is a bidirectional with a single 
wire/cable. Early on I did some side by side A/B comparison switching of 
a classic 2 wire and coaxial 2 wire with no discernible difference.
I originally built my system with RG6 and Type F connectors. Problems 
have arisen in that it is near impossible to find good quality Female 
Type F connectors. the contact inside the connector either pushed out 
the back of the connector or has the retention force of a piece of 
tinfoil (yet another "gift" from PRC) . The net result is that I have 
been plagued with intermittent connections and am slowing changing my 
system over to PL259/SO239 connectors. This necessitates changing out 
the RG6 as well since the jacket on most RG6 is steel and aluminum and 
cant be soldered to adequately. So if you go this route I recommend 
PL259's connectors and a coax with a solderable braid
Typical "does it work"  comment worthy of a quote from dozens of QST 
article" I have worked a lot of DX with these antennas that I could not 
hear on T top vertical" . Actually I have worked 132  countries on 160  
in just 8 months after getting back on the band after a 10 year hiatus.
See you in the pile ups
Dave
NR1DX


On 2/29/2020 12:16 PM, Ham Hicks wrote:
> As I recall from the practice of years past, 300 ohm was the only way to
> hook up to a TV or FM broadcast antenna. There was both the flat variety,
> and a round design. The round type greatly reduced the rain / snow
> degradation as the "field" was completely within the line, and it was much
> stronger.  Maybe someone still has some of that tucked away.
> Ham
> KB4BR
>
> -----Original Message-----
> From: Topband [mailto:topband-bounces+ham306=bellsouth.net@contesting.com]
> On Behalf Of Ned Mountain
> Sent: Saturday, February 29, 2020 10:02 AM
> To: topband@contesting.com
> Subject: Topband: 300 ohm twin lead for bidirectional Beverage antennas
>
> Hi Joe,
>
>   
>
> Have as look at the reviews of this bi directional Beverage.  I have been
> involved with the design and testing for the past 11 years.  The ease and
> convenience of working with low cost RG-6 for all antenna elements is a
> blessing.
>
>   
>
>   
>
> https://www.eham.net/reviews/view-product?id=14379
>
>   
>
> Ned
>
> WC4X
>
>   
>
>   
>
>   
>
>   
>
> Ned Mountain
>
> ned.mountain@mindspring.com
>
> 770 823 4205 (M)
>
>   
>
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--
Dave
Manuals@ArtekManuals.com
www.ArtekManuals.com


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