[450] Slack Loop Addendun

[David McKenzie]

I looked at the m2 stacking distance as a reference and they say 32-50
inches, so somewhere in that is ideal but with the limited space on the mast
(if it's all on the same mast), I had to improvise. Ideally you don't want
anything within 5 feet of the beam (10 foot stacking distance, half that),
so I did what I could.

I made the model in google sketchup (it's a free program, google it). I've
attached the model. I've gotten pretty decent at it and made it up from
scratch in about an hour. I saved the models as components so now I have a
working set to start doing more models.



2009/3/23 <djmay at comcast.net>

> Also, Dave, as matter of reference, KU4AB recommended 48 inches for
> stacking the halos, which is where they are right now.
> ----- Original Message -----
> From: "David McKenzie" <kb1fsy at vhfwiki.com>
> To: "144.450 Mailing List" <450 at lists.vhfwiki.com>
> Sent: Monday, March 23, 2009 8:54:24 PM GMT -05:00 US/Canada Eastern
> Subject: Re: [450] Slack Loop Addendun
>
> Attached is what I'd do (everything is to scale, estimated on the loops,
> and adjust the spacing to your liking. You can get the thrust bearing from
> Stark Electronics in Worchester, Mass for $20 or so. Drive or ship up to
> you, but I wouldn't do it with out dropping the rotor and using a thrust
> bearing, similar to Bob's setup and the poll in my back yard that you see so
> often.
>
>
>
> 2009/3/23 <djmay at comcast.net>
>
>>  I see...  it's the same thing I have now for the halos.  What was
>> hanging me up, Bob, was I was remembering the beam in my attic in Woodbury
>> and I had to have tons of slack because the antenna was mounted  just above
>> the rotor (the rotor was fixed to the attic floor.)  Thanks for undoing my
>> mental block.
>> ----- Original Message -----
>> From: "Bob" <N1UJS at toast.net>
>> To: "144.450 Mailing List" <450 at lists.vhfwiki.com>
>> Sent: Monday, March 23, 2009 9:30:57 PM GMT -05:00 US/Canada Eastern
>> Subject: Re: [450] Slack Loop Addendun
>>
>>   I don't have any close up pictures, so I'll try to explain....
>> dress the cable from the beam in a straight line domn the mast with wire
>> ties ont he OPPOSING side of the mast from the "rotor stop"......put the
>> LAST wire tie (idealy MORE than one at this point) a foot or two above the
>> rotor.   With the antenna turned halfway through rotation (if your "stop is
>> NORTH, then point it SOUTH) bulge the cable out a foot or more so it makes a
>> hump in the same direction the antenna is pointed, then start strpping it to
>> the mast BELOW the rotor at about a foot or two down the mast and continue
>> down with your ties.
>> This should allow you enough slack in either direction of rotation.
>> Get it?
>>
>>
>> ----- Original Message -----
>> *From:* djmay at comcast.net
>> *To:* 450 at lists.vhfwiki.com
>> *Sent:* Monday, March 23, 2009 7:07 PM
>> *Subject:* [450] Slack Loop Addendun
>>
>> Pictures OR diagrams would be greatly apprecited.  No rush, the beam is
>> coming from M2 in California, and I was told it might be about a week.
>>
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