[TowerTalk] Rotator Query

[John Simmons]

Anybody read the manual? There is a chart that explains what you need.


-- 
73,
-de John NI0K in rural Debs, MN USA

Joe Subich, W4TV wrote on 4/3/2021 9:07 AM:
> On 2021-04-03 9:02 AM, Wilson Lamb wrote:
> >
>> If you find the right contractor, you can get control transformers 
>> out of old air conditioning units, usually 120V to 28V,
> Depends on the current rating of the surplus transformers.  You would
> need at least 5A on the low voltage side.  Given the dual winding
> nature of the Hy-Gain rotors you would also need *six* transformers
> (two for the brake (1/2), two to rotate CW (5/1), and two to rotate
> CCW (6/1)).  The motor run capacitor (4/8) would need to be relocated
> to the tower.
>
> The other option is to use one pair of 8A transformers (step up/step
> down) on wires 1/2 (brake and motor common) and a couple of 24 VAC
> relays (at the tower) to control rotation (again with the motor run
> capacitor relocated to the tower).
>
> In either case, be careful to bring wire 1 back unbroken as it is also
> used for the direction indication.
>
> Years ago the solution for Hy-Gain rotors was to use a surplus 5 - 6.3V
> (filament) transformer to "boost" the 24-26V.  Connect the primary of
> the additional transformer in parallel with the primary of motor/brake
> transformer and connect the secondary in series with the "ground" lead
> from the brake transformer secondary to terminal 1 (common to motor and
> brake).  Make sure to check the brake voltage for boost instead of buck!
>
> 73,
>
>    ... Joe, W4TV
>
>
> On 2021-04-03 9:02 AM, Wilson Lamb wrote:
>>
>> How about using transformers to raise the voltage for the long run 
>> and again at the tower, to go back down.
>> You could use at least 120V, but likely even 240V.
>> If you find the right contractor, you can get control transformers 
>> out of old air conditioning units, usually 120V to 28V,
>> They often show up at hamfests too.
>> Wilson
>> W4BOH
>
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