Topband: 8 Circle question

[Joe Subich, W4TV]

On 2022-02-07 4:45 PM, Jim Miller wrote:
 > I was doing the YCCC version which uses 9 antennas to form a 3 element
 > endfire in each direction.

The 9 circle (3 element endfire) uses approximately 1:2:1 element
"drive".  Removing one of the end elements will not yield a "clean"
pattern but you would need to model both 0:2:1 and 1:2:0 arrays to
see if the remnant pattern would be acceptable.

73,

    ... Joe, W4TV


On 2022-02-07 4:45 PM, Jim Miller wrote:
> I was doing the YCCC version which uses 9 antennas to form a 3 element
> endfire in each direction.
> 
> I'm obviously limited in space here...
> 
> Thanks and sorry for the confusion
> 
> jim ab3cv
> 
> On Mon, Feb 7, 2022 at 4:43 PM <w5zn at w5zn.org> wrote:
> 
>> Jim,
>>
>> Which 8 circle version are you referring to?? The HiZ-8 or the Broad
>> Side-End Fire (BSEF) 8 vertical array?
>>
>> The HiZ-8 uses all 8 verticals for each direction but the BSEF array
>> only uses 4 verticals for each direction.
>>
>> 73 Joel W5ZN
>>
>>
>> On 2022-02-07 14:38, Jim Miller wrote:
>>> I'm looking at putting out an 8 circle but three of the antennas on the
>>> circumference may need to be seasonally placed since they would be on
>>> my
>>> neighbor's property.
>>>
>>> If those three were removed would the remaining 2 elements for each
>>> (opposite) direction left in place still produce a cardioid pattern if
>>> switched toward those directions?  I'd terminate the removed lines with
>>> 75
>>> ohm terminations of course.
>>>
>>> I would leave the center element and the remaining 5 elements on the
>>> circumference in place year round to minimize seasonal work if needed.
>>>
>>> 73
>>>
>>> Jim ab3cv