[TowerTalk] Assembling a Yagi

[Art Greenberg]

The antenna is a 6 element 6m yagi, VB-66DX. The instructions are a 
photocopy of a photocopy, I think. The drawing is too small to see 
sufficient detail.

I have an earlier version of this antenna, the 6m "Long John", and for 
that the elements were indeed pre-cut. There was only a little room for 
adjustment, that being the depth into the element bracket that the 
element was inserted.

This antenna has a short section of 7/16 dia. tubing at the boom end of 
each element, and the 7/16 dia. tubing telescopes into that. That change 
provides much more room for adjustment. I presume the change also 
lengthens the life of the elements.


On 1/26/23 23:00, Jim W7RY wrote:
> Most hygain antennas use a predetermined length of tubing at each 
> element. The measurements are usually  just for the joints after the 
> first piece of aluminum that is hooked to the boom.
> 
> But, this TH-6 diagram shows the lengths of the pieces against the boom.
> 
> What do the instructions show?
> 
> 
> 73, Jim W7RY
> 
> 
> 
> On 1/26/2023 4:26 PM, Art Greenberg wrote:
>> I should proof read before posting. The DE is insulated from the boom. 
>> Fed with a beta match. Its a Hy-Gain antenna.
>>
>>
>> On 1/26/23 17:24, Art Greenberg wrote:
>>> I think I left out an important detail. Elements are all connected to 
>>> the boom. Even the DE, fed with a "beta" match.
>>>
>>>
>>> On 1/26/23 17:22, Doug Christensen wrote:
>>>>  From  center of where the electrical connection starts near the 
>>>> boom, to
>>>> where the element terminates at the outside of the array.
>>>>
>>>> doug
>>>> wb1e
>>>> 73
>>>>
>>>> On Thu, Jan 26, 2023, 12:34 PM Art Greenberg <art at artg.tv> wrote:
>>>>
>>>>> The instructions for setting element length aren't clear. Do I measure
>>>>> from element tip to the side of the boom, or to the center of the 
>>>>> boom?
>>>>>
>>>>> I think its the later ...
>>>>>
>>>>> TNX
>>>>>
>>>>> -- 
>>>>> Art Greenberg
>>>>> WA2LLN
>>>>> art at artg.tv
>>>>> _______________________________________________
>>>>>
>>>>>
>>>>>
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>>
> 

-- 
Art Greenberg
art at artg.tv