[ARC5] 28 volt high-current supplies?

[Christopher Bowne]

I’ve measured the peak inrush current on my ART-13’s DY-17A dynamotor,  it was a nominal 160 amps.  Just float a couple of 12 batteries across the output of your supply, make sure that they are fully charged and full sized automotive or deep cycle marine type, small one may not deliver enough peak current to preclude tripping the output breaker in on your high current supply.

Chris AJ1G 
Stonington CT

Sent from my iPhone

> On Feb 26, 2022, at 13:57, Charles via ARC5 <arc5 at mailman.qth.net> wrote:
> 
> I am sure I would have no trouble starting a DY-17 with a 33 amp full load rating. This beast is 3.5 times that full load draw and consequently any surge current would likely also be 3.5 times that...
> 
> Anyway I am going to investigate shorts on the AC side, and my prime suspect is the (noise reduction?) capacitor on A phase. Hope it's not the armature. It does have a repair request tag from the 80's or 90's (don't remember at moment) and an unreadable "Serviceable" tag. The electromechanical regulator (carbon piles!) will get a look after I check the cap. Something else I have no experience with.
> 
> 
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