Duhhh - I apologize for the stupid question. I don't know what I was
visualizing. Of course, what you describe is exactly how it works in my
case, and I will simply need to substitute a longer piece of mast tubing
in the upper clamp of the rotator. Easy peasy.
73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at<https://reversebeacon.net>.
For spots, please use your favorite
"retail" DX cluster.
On 7/27/2022 1:52 PM, Joe Subich, W4TV wrote:
> My AB-577 (the first and only one I've ever been up close and personal
> with) has a short stub of tubing that is integral with the top guy
> connection, and on which my C-3 mounts nicely .
How/where are you mounting your rotator?
The "top stub" ("Antenna adapter" 80063; SM-C-423587) - shown in Fig
1-4, and Fig 2-12 in the "manual". The bottom of the rotator "pipe
mount" clamps to it (it's just over 2" outside diameter) with the mast
clamped into the top of the rotator and antenna mounted to the stub
mast above the rotator.
I'd use a 6' piece of 2" x .120 tubing for the mast with the C3 as
close to the top of the rotator as possible with a 3 or 4 element
6m yagi 5' above the C3.
73,
... Joe, W4TV
On 2022-07-27 12:32 PM, Pete Smith N4ZR wrote:
This is pretty speculative, so if anyone wants to erase now...
My AB-577 (the first and only one I've ever been up close and
personal with) has a short stub of tubing that is integral with the
top guy connection, and on which my C-3 mounts nicely . If I want to
stack a 6-meter yagi on top of my existing tribander, I suspect that
the best way to do so would be to telescope the bottom end of 6 feet
or so of tubing inside the stub and put a bolt through to hold it
both vertically and in rotation. Just by chance, has anyone ever
measured the inside diameter of that short stub (assuming that it is,
in fact, part of the standard AB-577)? I'd hate to get the rocket
launcher all the way down, only to find that the mast extension I
will have selected is either too small or too large.
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|