[ARC5] Dynamotor Regulation

[Cliff Miller]

please add to my last - I reread the original message and you did mention
the BC-456 so we're talking the dynamotor power supply for the modulator.
I hope someone updates my notes with what size batteries/ charger/ DC Power
Supply works with the larger dynamotor.  The server power supplies I
mentioned are available in quite large current ratings.
73 - Cliff W4HGR

On Sat, Jul 29, 2017 at 8:19 AM, Cliff Miller <cliff52 at gmail.com> wrote:

> Have we clarified if we're talking about just a receiver or a
> receiver-transmitter system?  I have no experience with the dynamotor on
> the modulator for the transmitter so I can only speak to using the receiver
> dynamotors, which is smaller.
> I have successfully used 2-12V gel-cell batteries of 7A-h or more
> capacity, series-connected, to start the receiver dynamotors.  I've also
> used my 13.8V 25A ham power supply and a 12V gel-cell to run them / no
> problem.
>
> 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 bought two of these to experiment but have yet to try them.
>
> Of course, eBay is your friend with various 24-28V high current power
> supplies available just about all the time.  I tried the server units since
> they're cheap (two for 15 bucks plus shipping).
>
>
> 73 Cliff W4HGR
>



-- 
Cliff Miller
cliff52 at gmail.com
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