Topband: 160M ant advice

[Robert Harmon]

Stan,

With shunt feed I would gain the 18 foot mast with the yagis, the total 
overall height is 108 feet.
I haven't really considered shunt feeding.  I see your point of the 
wires with an L in proximity to other
antennas.  That was a worry I had with the 40 meter yagi and the L. I 
will look into shunt feeding.  I have ON4UN's book, probably should 
start there to bone up.  Any other resources to learn abut shunt feeding ?
The top band archives probably has a lot of discussions about shunt 
feeding also.

thanks Stan,
Bob
K6UJ



On 12/18/15 1:36 AM, Stan Stockton wrote:
> Bob,
>
> There is no reason I can think of to not shunt feed the tower as it is with either ground radials or elevated radials.  An inverted L isn't as good as a vertical for DX and you would just be adding clutter and horizontal wires in proximity to your other antennas.  Shunt feeding a tower is very, very simple.
>
> 73... Stan, K5GO
>
>> On Dec 17, 2015, at 8:06 PM, Robert Harmon <k6uj at pacbell.net> wrote:
>>
>> I am planning an install of a 160M inverted L  and would like critique from you top banders.
>> I was originally planning a separate tower for 160 but my XYL has squashed the idea  :-)
>> My tower is 90 feet fully extended with a 18 foot mast currently used for a Force 12 WARC plus 10/15 beam
>> on top and a N6BT DXU-32, 2EL 40 and 3EL 20  12 feet below.
>> At the top of the top section I have a 10 foot fiberglass pole I plan to extend out to support the vertical, so it will be 10 feet away from the tower.
>> I am thinking of feeding the vertical and having 4 elevated radials at the 14 foot level.
>> So the vertical wire will about 76 feet long.
>>
>> I am wondering if I would be better lowering the feedpoint & radial tie ins down from 14 feet say to 8 feet and have more length in the vertical portion of the L or better to have the 14 feet elevation for the radials ?
>>
>> Also the horizontal leg of the L on top will be about 5 feet below the 40/20 yagi only 10 feet out from the tower,
>> do you think this is OK as far as interaction between the yagi and the 160 L ?  Anything else I should consider ?
>> I have never had a decent 160 antenna, just hoping I can work something out with my existing situation
>>
>> thanks in advance,
>>
>> Bob
>> K6UJ
>>
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