[Top] [All Lists]

Re: Topband: horiz TLDL for 80m

To: topband List List <>
Subject: Re: Topband: horiz TLDL for 80m
From: Bob K6UJ <>
Date: Sat, 7 Jan 2012 19:08:03 -0800
List-post: <">>
The reason I am trying a horizontally polarized delta loop is because I had a 
vertically polarized delta
strung from the tower and it was too noisy.  The tower was reradiating noise to 
the delta.  I am using a wood pole extended out 4 feet from the tower
for the apex support and the lower section slopes away form the tower about 30 
degrees.   I did a temporary lash up with feed at the bottom for horizontal 
polarization and 2 to 3 units quieter on the noise.  Now I want to try linear 
loading to reduce the size a little too.    I would rather have the vertical
polarization for DX but don't like the higher noise level.  So its all about 
the noise. 


On Jan 7, 2012, at 5:02 PM, Herb Schoenbohm wrote:

> Bob,
>  IMHO what you described would be a linear loaded loop and the folded 
> down wires should be at the top and the feed where you described.  This 
> avoids some feedline interaction.  But remember such an antenna  
> depending on spacing from the tower will couple significant energy to 
> the tower itself.  So all bets are off on getting mostly horizontal 
> polarization.  The loop itself, even feed at the bottom center will 
> still have some of that.  My suggestion, but you should model it first, 
> is to pull the bottom section away at a 45 degree angle from the tower 
> so you have a sloping Delta Loop.  This would probably help reduce tower 
> interaction a bit.  But the most ardent supporters of Delta loops 
> recommend wooden support poles and corner feeding for best DX work since 
> the vertical component is what really helps you on the low bands.
> 73
> Herb KV4FZ
> On 1/7/2012 8:29 PM, Bob K6UJ wrote:
>> I am panning to try out a top loaded delta loop for 80 meters strung off the 
>> side of my tower.
>> I want to have a horizontally polarized loop.  I will feed at the middle of 
>> the bottom horizontal leg.
>> Does the loading wire attach to the apex at the top on this loop ?
>> thanks,
>> Bob
>> K6UJ
>> _______________________________________________
> _______________________________________________
> UR RST IS ... ... ..9 QSB QSB - hw? BK

UR RST IS ... ... ..9 QSB QSB - hw? BK

<Prev in Thread] Current Thread [Next in Thread>