>From Dave - KC9IM EX:TL8IM, 4K0IM,YB0AIM,KH2AD,KC6GZ,ETC..
I will be leaving the USA on 18 July for a two year assignment in Bissau,
Guinea-Bissau with the U.S. State Department. I should be on the air as
J52IM (hopefully) in mid-August when my equipment catches up with me. The
Embassy has told me already that there should be no problem in obtaining
licensing. I'm taking an A4S and an R7 (same as when I was TL8IM) and plan
to be active on 10-40M. When I am not in contests I can usually be found on
the 236 DX Net, the EU DX Net, or the 10M PT DX Net. QSL's will be via
Howard, KB9XN. 73's, Dave...
>From w7ni@teleport.com (Stan Griffiths) Sun Jun 16 19:32:30 1996
From: w7ni@teleport.com (Stan Griffiths) (Stan Griffiths)
Subject: HY-GAIN ROTOR
Message-ID: <199606161832.LAA17318@desiree.teleport.com>
>Carlos,
>
>I have a Ham-IV that I am replacing with a T2X. My Ham-IV has come apart
>on the tower
>twice now, so I need something more heavy-duty. The Ham-IV is held togther
>with
>four screws that are tapped into the top bell housing. These fell out, and
>allowed the
>rotor to come apart and free-wheel in the wind.
>
>The T2X is held together with 6 bolts with nuts that go thru the bell
>housing. This should
>be better (I hope) than the Ham-IV.
>
>I will be using Lock-Tite on the bolts, just in case.
>
>My antenna is a TH-7 -- 7 elements on a 24' boom.
>
>Get the T2X. You might also buy a heavy-duty brake wedge from C.A.T.S.
>while you are
>in the U.S. ($15, I believe). That is the most frequent thing to break in
>the Ham-IV/T2X
>rotors.
>
>Tom
I believe the cause of this rather common "coming apart" of Ham-XX type
rotators is because of poor mechanical alignment of the axis of the rotator,
the rotator shelf, and the mast. There is an answer and I have never seen
it fail.
It all has to do with order in which you tighten the bolts that hold all
that stuff in place.
Think of it this way: The one thing you can't control is the the alignment
of the pipe section of a Rohn pipe top. Rohn controls that when they weld
it together in the factory. So here is what you do.
1. Thread the mast through the tower pipe top and down into the tower about
where the rotator will grab it. Temporarily secure it in place with the
pipe top "set screws".
2. Mount the rotator on the mast and snug the rotator mast clamps up. This
assures that the axis of rotation of the rotator is properly aligned with
the axis of the mast.
3. Next put the rotator shelf in place and install the four bolts to secure
the shelf to the bottom of the rotator. This assures that the plane of the
shelf is correctly aligned at right angles to the axis of rotation of the
rotator and mast.
4. Last, install the U-bolts that secure the shelf to the tower legs and
allow them to seek their own position on the each leg.
5. Check all bolts and nuts for tightness.
6. Turn the rotator through one entire rotation and make sure it does not
tend to bind in any direction. If it does, stop it there and loosen the
shelf U-bolts and allow them to seek a new position. Tighten them in the
new position and rotate again.
Most people I have talked to about Ham-XX rotators coming apart have pipe
tops and they installed the shelf first, rotator second, and mast third.
This method will almost always guarentee misalignment and excessive stress
on the rotator housing as the rotator is turned. I think this stress is
what causes the bolts to work loose and fall out of a Ham-XX over time. I
can see where this could be a problem with a flat top and a bearing also so
the same installation procedure should be used there, too.
Stan w7ni@teleport.com
>From jreid@aloha.net (Jim Reid) Sun Jun 16 20:25:22 1996
From: jreid@aloha.net (Jim Reid) (Jim Reid)
Subject: Filter Access
Message-ID: <1.5.4.32.19960616192522.0066732c@aloha.net>
Hi, Need some help about how to get the Kenwood
TS-950 to allow me to select the 500 Hz IF filter
in LSB mode. Cannot get below the 1.8 kHz filter
in either SSB mode. But of course, can select
500 Hz filters in both IF sections in CW and FSK
modes. Kenwood's feature of not having to scroll
thru all installed filters in all modes is nice,
but sometimes I do want access to these filters.
Is there a way; obvioustly, maybe, a 500 Hz filter
could be installed in the 1.8 kHz filter slot, maybe.
But would prefer to use the ones alredy there, but
now not available.
Thanks and 73, Jim, AH6NB
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