[TowerTalk] Ham IV rotor control box

[Dan Evans]

Many thanks Tom & All,

It would seem that this manual has a slight, but important, typo!  Looks
like it may be time to let my friend in on the good/bad news.

The good news is there doesn't seem to be anything wrong with the control
box...

The bad news is there doesn't seem to be anything wrong with the control
box...

73 & thanks again,
Dan


Dan Evans N9RLA
Scottsburg, IN 47170
{EM78}
IN-Ham list administrator
QRP-l #1269
1/2 of the N9RLA /R no budget Rover Team
Check out the Rover Resource Page at:
http://www.qsl.net/n9rla

----- Original Message -----
From: "Tom Anderson" <ww5l@gte.net>
To: "David O Hachadorian" <k6ll@juno.com>
Cc: <towertalk@contesting.com>
Sent: Wednesday, November 28, 2001 7:38 PM
Subject: Re: [TowerTalk] Ham IV rotor control box


>
> Dan:
>
>
> My Ham IV manual, circa 1987, shows the following between terminals when
checking
> from the ground:
>
> per table 2 on page 20
>
> To Check              resistance            between terminals
> Brake Solenoid      .75 ohms+leads          1-2
> 1/2 motor winding    2.5 ohms+leads        1-8
> 1/2 motor winding    2.5 ohms+leads        1-4
> 1/2motor+switch      2.5 ohms+leads        1-6
> Entire Motor            5 ohms + leads        8-4
> Right Limit Switch    0 ohms +leads        8-5
> left limit switch        0 ohms + leads        4-6
> entire pot switch      500 ohms                3-7
> pot arm to + end      0 to 500 ohms        3-1
> pot arm to - end        0 to 500 ohms        1-7
>
> Also:
> 1. With unit plugged in, terminals 1&2 should show 30 volts AC when the
brake
> lever is pressed.
> 2. Terminals 1&5 should show 30 volts AC with brake release lever
depressed and
> CW lever depressed.
> 3. terminals 1 & 6 should show 30 volts AC with brake release lever
depressed and
> CCW lever depressed.
> 4. Terminals 3 & 7 should show approximately 13 volts
>
> "Resistances with unit NOT plugged in:"  page 20 of manual:
>
> terminals 1&2 reads .4 ohms (same as David's reading)
> should be same value across terminals 1 through 5 with clockwise switch
lever
> (right hand) depressed and across terminals 1 through 6 with
counterclockwise
> (left) depressed.
>
> Resistance across the input line cord with on/off switch in the on
position and
> brake lever depressed should read 3.8 ohms.
>
> all of this per page 19-20 of manual.  My rotor has a serial number of
87023.
>
> Hope this helps.
>
> Tom, WW5L
>
>
>
>
>
>
>
>
>
> David O Hachadorian wrote:
>
> > My Tailtwister manual says .4 ohm. I think your manual
> > has a typo.
> >
> > Dave Hachadorian, K6LL
> > Yuma, AZ
> > K6LL@juno.com
> >
> > On Wed, 28 Nov 2001 10:19:55 -0500 "Dan Evans" <n9rla@yahoo.com> writes:
> > >
> > > Hi Folks,
> > >
> > > A local friend brought over a Ham IV control box this past weekend.
> > > He told
> > > me it quit working, and wanted me to check it out for him.  I've
> > > never owned
> > > a Ham IV, but luckily he brought the manual over with it.  I ran
> > > through the
> > > test procedures outlined in the manual and everything seemed OK
> > > except for
> > > one part.  The manual says checking resistance across terminals 1
> > > and 2 [and
> > > several others] should read 4 ohms.  My meter shows this as .4 ohms.
> > >  Now I
> > > don't have any reason to doubt the accuracy of my meter, but this
> > > isn't much
> > > resistance.  Does this sound like a problem?  Is this an indication
> > > of any
> > > common failures?
> > >
> > > All of the voltage checks the manual called for were correct.
> > >
> > > Thanks for the help,
> > > Dan
> > >
> > >
> > > Dan Evans N9RLA
> > > Scottsburg, IN 47170
> > > {EM78}
> > > IN-Ham list administrator
> > > QRP-l #1269
> > > 1/2 of the N9RLA /R no budget Rover Team
> > > Check out the Rover Resource Page at:
> > > http://www.qsl.net/n9rla
> > >
> > >
> > >
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>
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