[TowerTalk] Taper conversions ...

[Joe Subich, W4TV]

On 2022-07-29 10:29 AM, Tom Hellem wrote:
 >
 > The best tool I have found is AutoEZ by AC6LA.
 > Playing around with taper schedule in it is so easy it's ridiculous.
 > It's well worth the small price he asks for it.

Unfortunately, it's not just the small price he asks for it... it
also requires the current version of Excel and M$ absurd licensing
requirements (annual tribute for Office).  I have the previous version
of Office Pro and the current versions of Open Office but he doesn't
support those.

I could also convert them myself in AO, *if* I still had a machine
capable of running DOS <G>.

I'm looking to convert uniform 5/8" or 1/2" elements to 15" center
sections of 5/8" with 7/16" tips (using old Hy-Gain elements).  In
addition I'd need 15" center sections of 5/8" with 1/2" tips (missing
some 7/16" tubing) and 6' x 5/8" center sections with 1/2" tips (for
new elements).

None of the departures will be large.  The difference in total length
between uniform 1/2" and uniform 5/8" elements varies between 1/4" and
5/8" depending on the element but that's enough to mess things up.

73,

    ... Joe, W4TV


On 2022-07-29 10:29 AM, Tom Hellem wrote:
> Joe-
> The best tool I have found is AutoEZ by AC6LA.
> Playing around with taper schedule in it is so easy it's ridiculous.
> It's well worth the small price he asks for it.
> For a 6 meter beam I don't think you are going to need to be very
> concerned with wind survival, as long as you use common sense and don't
> try to build an element with, say, 1/2" tubing as your largest diameter
> section.
> The only caveat I can offer is that NEC 2 engine will not give 100% precise
> prediction
> for the final length of DE, it will usually need to be tuned to length in
> the field.
> 
> Tom
> K0SN
> 
> On Fri, Jul 29, 2022 at 8:17 AM Chuck Dietz <w5prchuck at gmail.com> wrote:
> 
>> It is usually contained in whatever Yagi design program I use such as YO.
>> I think there are stand-alone programs to create a taper schedule, but I
>> didn’t find one in a quick search.
>>
>> Chuck W5PR
>>
>> On Fri, Jul 29, 2022 at 8:48 AM Joe Subich, W4TV <lists at subich.com> wrote:
>>
>>>
>>> I have some 6M Yagi designs with uniform element diameters
>>> that I would like to build using tapered elements I have on
>>> hand from the aluminum pile.
>>>
>>> Does anyone have a pointer to converting the uniform element
>>> lengths to an arbitrary taper schedule?
>>>
>>> 73,
>>>
>>>      ... Joe, W4TV