[TowerTalk] One of our own...

[Bob K6UJ]

Joe,

I am in the planning stage of trying a delta loop, apex up.
Doesn't this apply to a delta too ?  For vertical radiation, feed 1/4 wave
down from the top (apex)  ?

Bob
K6UJ


On 5/26/16 9:58 AM, Joe Subich, W4TV wrote:
>
> On 5/26/2016 12:31 PM, Jim Thomson wrote:
>> ## Instead of feeding in the lower corner, if you really wanted 100%
>>  true vert radiation, then feed it part way up on one side. I believe
>>  it had to be fed 1/3 the way up one side of the loop. Then route
>> the coax straight across from the elevated feedpoint....to the
>> tower, then down the tower to shack.
>
> That depends on the aspect ratio of the loop.  The correct feed point
> for maximum vertical polarization is 1/4 wave down from the apex. If
> you have a true equilateral triangle, the feedpoint will be 1/3 of the
> way up from the corner ... if the loop is "flatter" (lower tower) the
> feedpoint will be farther from the corner.
>
> 73,
>
>    ... Joe, W4TV
>
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