[Harc] 2m Yagi assistance needed
JAMES FALLS
radio-tuber at att.net
Wed Apr 7 18:06:28 CDT 2021
Your 3-el measurements would be good to compare with Dan’s.
Thanks! Jim K6FWT
> On Apr 7, 2021, at 16:00, JAMES FALLS <radio-tuber at att.net> wrote:
>
> That would be great, Dan!
> Email: radio-tuber at att dot net
>
> 73 DE Jim K6FWT
>
>>> On Apr 7, 2021, at 14:44, ben adams via Harc <harc at humboldt-arc.org> wrote:
>>>
>>
>> Jim,
>>
>> I have a 3 element by arrow you could get a ballpark idea with.
>>
>> http://www.arrowantennas.com/arrowii/146-437.html
>>
>> Now i see there is also a 4 element version the Alaskan arrow: http://www.arrowantennas.com/arrowii/alaskanarrow.html
>>
>> The director is longest, then radiating, the director.
>>
>> Spaced evenly (if I remember correctly).
>>
>> The 440 portion of the antenna is similar, but with 7 elements, also evenly spaced. The 3 directors furthest from the radiator are the same length.
>>
>> I think the log periodic yagi's are the ones with uneven element spacing.
>>
>> Ben
>> Kk6syj
>>
>>
>>> On Wed, Apr 7, 2021, 12:30 JAMES FALLS via Harc <harc at humboldt-arc.org> wrote:
>>> I am building a 4 element , 2m yagi, and online designs are all over the place. Some have elements decreasing in length back to front, some don’t. Some show a decreasing element spacing, some don’t. Which is it?
>>>
>>> I’m using a wood spar, and the driven element will be a 1/2 wave dipole cut for the middle of the band, directly fed by coax. I’m also going to end mount it to avoid mast interaction.
>>>
>>> Jim Falls K6FWT
>>>
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