[ARC5] Dynamotor Regulation

[Kenneth G. Gordon]

On 29 Jul 2017 at 8:19, Cliff Miller wrote:

> 
> The RC folks have pioneered the use of two 12V computer server power supplies, 
> series-connected, to charge 24V model airplane batteries.  These are readily available in high 
> current values since the server people just install new ones periodically because 
> failure-is-not-an-option, etc.  The negative side is shorted to ground so you have to separate that 
> on one of the supplies if you're going to connect them into 24V.  Lots of details on using these on 
> some of the RC forums.

I routinely use used computer power supplies, the kind that mount inside the computer, as 
stand-alone 12.6 VDC power supplies. The ones I use are small, and RFI free. I clip out or 
unsolder all the wires for any voltage OTHER THAN 12.6 VDC, then set the voltage 
adjustment pot to at least 12.6 VDC output. Even the relatively "small" power supplies are 
good for 25 amps and they are voltage regulated.

There are several sites on the web that show how to do this, and there was even an article in 
QST magazine on doing this to provide a 12.6 VDC regulated bench supply.

I mount banana jacks on them and a pilot light. They work very well.

I also use them to power 12.6 VDC equipment, such as 2 meter mobiles, etc.

I have not yet tried to connect two in series, but I cannot think it would be much of a problem 
to do so.

Ken W7EEKB

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