[Top] [All Lists]

[TowerTalk] Ham rotor

To: <>
Subject: [TowerTalk] Ham rotor
From: (Kenneth D. Grimm)
Date: Wed, 08 Apr 1998 07:32:03 -0400

Dick has given you the correct hookup for both the Ham M and the Ham
II.  It is definitely time to get out your VOM and do a little checking
inside the box and with your connecting wires.  The rotor is OK, right? 
So the problem is either with 1) the wires connecting to the Ham II box
(only if they are in any way different from the wires connecting to the
Ham M box), 2) the terminal strip on the back of the Ham II box, 3) the
meter fuse, 4) the 10 K ohm resistor in series with the meter, 5) the
cal pot, and 6) all of the parts in the meter power supply; xfmr, diode,
filter cap.  However, based on the meager information that you provided
about the box, my first guess would be a broken Cal switch - stuck in
the cal position.  To check this, does the meter reading change when you
adjust the cal pot?  If so, it is stuck in the cal position and needs to
be "turned off" (ungrounded, that would be).  I may have missed
something, but it appears to me that your problem can only lie with the
components that are connected between terminals 3 and 7.

You do have a copy of the Mam II manual don't you?  If not, I will try
to scan a copy and put it on the Boatanchor Manual Archive.  Let me

Shane Autrey NC4SA wrote:
> Now that i have the wiring diagram for the rotor what do i need to do so
> that the control box itself will recognise the direction the motor is
> pointing in. The Ham M control box reads the direction correctly but when i
> wire up the Ham II control box the exact same way the control box gives
> absolutely no indication of direction. It stays all the way over to the
> right past the S on the scale.  Therefore when the rotor is turning i have
> to look out the window to see which way the beams are pointing in. This is
> especially cumbersome when trying to operate 2mtr sideband. I need to know
> why the Ham II box itself doesn't give a directional indication when the Ham
> M box does. For those of you that are wondering why i am going to the
> trouble to use a different control box when the original works just fine the
> answer is simple the Ham II control box is much better suited for my
> applications than the original one and you don't have to push a slide switch
> to see which direction your antenna(s) is/are pointing in.  thanks de nc4sa
> >Edited
> >
> >>Shane,
> >>
> >>Wiring is all the same on them;  1 is ground, 2 is the brake (if needed),
> 3
> >& 7
> >>are the directional indicator,  5 is CW for motor, 6 is CCW for motor, and
> >4 & 8
> >>go to the capacator in the control box.  The 500 ohm pot in the rotor is
> >where 3
> >>& 7 go.  The wires go on either end of the pot and the pot wiper is
> >grounded to
> >>pin 1 of the rotor.
> >
> >>Dick Williams  K8ZTT
> >

Ken K4XL
Boatanchor Manual Archive -

FAQ on WWW:     
Administrative requests:

<Prev in Thread] Current Thread [Next in Thread>