In a message dated 6/11/2007 11:16:58 A.M. Pacific Daylight Time,
> I have a 2 element 40m yagi about 8 feet above the thrust bearing of
my crankup tower. Working on the elements or feed is a real problem
because they are 8 feet away from the mast. Right now, the only 2
1) An aerial lift, bucket truck, cherry picker, etc.
2) Tram the antenna down from the tower after tramming down the SteppIR
mounted at the thrust bearing. This is quite a bit of work and requires
climbing the mast which doesn't thrill me a whole lot.
> It would sure be nice to be able to swivel the yagi at the U-bolt to
allow either element to be brought near the tower/mast for
maintenance. I've seen swivel attachments but the ones I saw didn't
look too substantial and they have very limited range. In other
words, they wouldn't be able to get the element close enough to the
tower to avoid #1 or #2 above.
> Any other bright ideas out there?
You forgot 3) which is to have your haul rope above the antenna as far
as you can get it with the end of your haul rope attached to the antenna.
Tension the haul line. Then you take the mast mounting U-bolts off - the
is now hanging by the haul line. Now pull the boom towards you. Put a sling
loop as a choker around the boom. Put another sling around the mast - use a
carabiner to hook them together.
Now pull the boom and slide the boom sling along the boom as far as you
can. Once you let go of the boom, the boom sling will tighten and hold the
boom in place. Repeat as necessary until you can reach the element. You can
that the more haul line you've got above, the easier it'll be.
Yes, the antenna will be a handful and yes, it's a bunch of work but it
will get the element within reach. I've done this many times with CC shorty
fortys and it works FB. You can also uses a comealong to pull the antenna if
Personally I like the drive-in lift myself. You only need to go up
35-40' or so. One phone call will take care of it.
What problem are you trying to resolve? I don't remember what it is.
Some sort of feedline problem?
The PVRC mount has some merit if you can fabricate one. Methinks that
your nearby tree and nearby SteppIR will prevent much antenna tilting by the
mount so I'm not sure how useful that'll be anyway.
TOWER TECH -
Professional tower services for hams
PS - How's Noah and his little sister? She must be getting big now.
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