[TowerTalk] Ham4 and CDE rotor controller

[Mark Robinson]

Ham IV schematic

I would check the value of R1 as a start.


Mark N1UK


----- Original Message ----- 
From: "AD5VJ Bob" <rtnmi at sbcglobal.net>
To: "'Brad Pioveson W9FX'" <w9fx at verizon.net>; "'chas'" <chasm at texas.net>; 
<towertalk at contesting.com>
Sent: Saturday, 05 July, 2008 1:29 PM
Subject: Re: [TowerTalk] Ham4 and CDE rotor controller


> Went to the BAMA site and downloaded the 'Ham II' and the 'Ham M' manuals.
>
> Looks like the Ham II controller is the same as the one I have here.
>
> Guess they used the same one for the HAM-4 rotors as for Ham II.
>
> I wish someone had a spare controller they could compare my findings to.
>
> The nomenclature on the bottom of the rotor I have says H4.
> So it is a Ham 4 rotor not a Ham IV rotor.
>
> Just found out that if I remove one of the 3 and 7 wires (wire 3)
> at the controller to the rotor direction pot, with all other wires 
> connected,
> then I have 12 volts DC across 3 and 7.
>
> The second I reconnect the #3 wire it drops back down to 6.3 volts DC.
>
> Also saw where if I push the calibrate with all wires connected it will
> calibrate on "N", if I disconnect the #3 wire (regaining the 12Volts DC)
> then it calibrates on the 'S' on the 'E' side of the meter as the manual 
> says it should.
>
> But the resistance between 3 and 7 is 521 ohms,
> and they add up to 521 from ground to each one at any point of rotation,
> so the direction pot cant be open or it would show
> an open resistance wouldn't it?
>
> I also watched the resistance on each leg as I turned the rotor and it is 
> smooth
> from 521 to 0 on each leg depending on direction of course.
>
> Seems like there is more of a short drawing down the 12 volts, but where 
> and how
> since it is regulated by the Zener it should be constant shouldn't it?
>
> I wish someone had a spare they could compare my findings to.
>
> Bob AD5VJ
>
>> -----Original Message-----
>> From: towertalk-bounces at contesting.com
>> [mailto:towertalk-bounces at contesting.com] On Behalf Of Brad
>> Pioveson W9FX
>> Sent: Saturday, July 05, 2008 6:18 AM
>> To: chas; AD5VJ Bob; towertalk at contesting.com
>> Subject: Re: [TowerTalk] Ham4 and CDE rotor controller
>>
>> Ham M and Ham II manuals here:
>>
>> http://bama.edebris.com/manuals/cde/
>>
>> 73, Brad, W9FX
>>
>>
>> ----- Original Message -----
>> From: "chas" <chasm at texas.net>
>> To: "AD5VJ Bob" <rtnmi at sbcglobal.net>; <towertalk at contesting.com>
>> Sent: Saturday, July 05, 2008 6:12 AM
>> Subject: Re: [TowerTalk] Ham4 and CDE rotor controller
>>
>>
>> > AD5VJ Bob wrote:
>> >> Does anyone have an older manual, I have downloaded the
>> only one I could
>> >> find and it is the one for the circuit  board model. Not
>> >> sure if the components are all the same between the older
>> ones and the
>> >> newer ones.
>> >>  Bob AD5VJ
>> >
>> > Bob
>> > if you find a source for the old manual for either controller OR the
>> > older Ham-n -- please post the source to the list. I am
>> sure that I am
>> > not the only person looking for those manuals (unless they were
>> > combined at some time).
>> >
>> > thanks and
>> > 73 de chas/k5dam
>> > _______________________________________________
>> >
>> >
>> >
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>>
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