----- Original Message -----
From: "Wayne.B"
On Wed, 25 Nov 2009 08:09:23 -0500, "Flying Pig"
wrote:
Follow the link in the anomaly thread, and you'll see why. It wouldn't
fit
on the bracket...
OK, based on the following picture, I think I see the problem. It
looks like the coil on the bottom of the Metz was interfering with the
upright portion of your aluminum angle bracket, requiring you to space
it higher?
http://img16.imageshack.us/img16/892...tzbracket3.jpg
You are incurring at least 1 db of extra loss as a result of that
connector stack (0.5 db per extra connection), and that's assuming
that no moisture has gotten in, and the connectors are all top shelf.
1+ db is a lot of loss, about equal to an 80 ft run of good quality
coax.
It looks like the solution is to trim away some small portion of the
outer end of the angle bracket as indicated in the cross-hatching so
that the Metz can be mounted flush the way it was intended. That
would eliminate both adapters that you have now.
While you're doing all that you might want to retighten the nut under
the red shrink tubing that holds the whip in place. They sometimes
loosen up over time and let the whip get away. It happened to us
about 20 years ago on a cruise to Maine. The good news was that while
up the mast fixing the Metz, I spotted a pod of whales on the horizon
and they put on quite a show for us.
Hi, Wayne, and list,
Thanks for the note - but the entire reason for the connector was that there
aren't any threads on the Metz which would allow attachment to the bracket.
As it is, the nut, which might be seen in one or more of the pix, on the
original connector (it's the same, as far as I can tell, is a standard
connector, one end in the base, and the other to the usual thin bracket),
but which (the bottom nut) broke off when I was getting the down-and off the
bracket, probably made the connector end too short to fully seat the ring
from the cable.
The way I have it installed allows plenty of room for the collar to screw on
tightly without contacting the nut securing it to the bracket.
Is there any reason to believe that this bulkhead mount connector is any
different electrically from the "standard" connector which was supplied with
the Metz (I have three - MMSI, AM/FM and this - and they all have what
appears to be the same connector as part of the original antenna)?
You'll note in the pic sequence that my original thought was to use the
original antenna. Then I found that the bracket interfered, so cut away the
offending part. It's not as big a cutaway as you have, but would have
allowed the Metz to mount to the bracket. Then I found that the threads
weren't long enough on the original connector to even get a nut on, let
alone the cable, and thus the kludge.
It's my presumption that I can do away with the double male under the
antenna as currently installed, along with the Metz-supplied connector,
using the bulkhead connector instead of the original, screwing the coil
directly to it (the new longer connector).
So, the question of the moment was whether I'm correct in that
presumption...
L8R
Skip
Morgan 461 #2
SV Flying Pig KI4MPC
See our galleries at
www.justpickone.org/skip/gallery !
Follow us at
http://groups.yahoo.com/group/TheFlyingPigLog
and/or
http://groups.google.com/group/flyingpiglog
"You are never given a wish without also being given the power to
make it come true. You may have to work for it however."
(and)
"There is no such thing as a problem without a gift for you in
its hand
(Richard Bach)