[TowerTalk] Shunt fed tower 2

[K4SAV]

..."Above the top at 35 feet is a triband.  I have a wire spaced 1 foot 
from the tower and attached at the 30 foot point.
I feed it at the bottom with coax and many radials.  On 80 cw with 50 
watts I work into europe.  On 40 cw with 50 watts I have worked into the 
Indian Ocean.  I am assuming it works on transmit or propagation was 
good.  But on receive it is a dog.  A real failure.

Compared to an off center fed 33 foot vertical (WD9AHH 73 magazine aug 
1981) the vertical is supperior in signal strength received."....
--------

I assume you are talking DX here and not local stations. If that 
vertical receives more signal strength that your shunt fed tower, you 
have something wrong with your tower. Then the vertical should also be 
better on transmit. Is it?

For receiving purposes signal to noise ratio is the parameter of 
interest (not signal strength).  For transmit purposes the received 
signal strength is the parameter of interest (not the S meter level of 
the noise).

If you have a wide disparity between these two antennas for 
transmitting, I would fix that before trying to phase them.

Jerry, K4SAV


p.haire wrote:

>Thanks for the info on shunt tower.
>
>I am 70 and retired.
>
>A few years ago I cut my vintage Rohn fold over tower from 50 feet to 30 feet so I could manage it better.
>
>Above the top at 35 feet is a triband.  I have a wire spaced 1 foot from the tower and attached at the 30 foot point.
>I feed it at the bottom with coax and many radials.  On 80 cw with 50 watts I work into europe.  On 40 cw with 50 watts I have worked into the Indian Ocean.  I am assuming it works on transmit or propagation was good.  But on receive it is a dog.  A real failure.
>
>Compared to an off center fed 33 foot vertical (WD9AHH 73 magazine aug 1981) the vertical is supperior in signal strength received.
>
>I want to use the tower and vertical in a phased array using discimilar verticals (Yardley Beers W0JF QST oct 1977).
>
>Before I go on I want to make sure the tower will not weaken the performane over the complete array.
>
>I am beginning to think it is best to go with some of the suggestions or a helical end loaded horizontal.
>
>Any suggestions or thoughts about the tower?
>
>Paul    WA5MUE
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