[Milsurplus] Batteries for dynamotor use ?

[AKLDGUY .]

My dynamotor is a 12V unit, powering an ARC-5 transmitter and 2 x 2E26 in
AB1 modulator.
Using a 12V gel cell battery of German manufacture, obtained from a local
surplus store.

The battery will run the 500V, 200mA dynamotor alone, but doesn't last long
even on no load.
Sitting across it is a 0-16V, 25 Amp commercially made power supply set to
13V. The meter
on this power supply shows about the right current, 14 Amps.

Neil ZL1ANM


On Sun, Nov 26, 2017 at 10:29 AM, Mike Durff via Milsurplus <
milsurplus at mailman.qth.net> wrote:

> What types of batteries are you guys using to power your dynamotors? I
> have a nice set of Power-Sonic 210AH 12VDC AGM.. But sadly, they are
> nearing the end of their life expectancy (10 yrs)...  and cost a small
> fortune to replace.
>
> I only have one dynamotor, for my ATD. Last I remember, I think it was
> about 44 amps in-rush at start up. Don't remember what the key down current
> draw is.
>
> Best to just buy some cheap and dirty automotive batteries and replace
> them every few years?
>
> Thanks, Durff, K4TQF
>
>
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