[Milsurplus] Wire size

[Jim Whartenby]

The manual says that the Dynamotor requires 27 volts @ 31.5 amps.  I would think that 6 AWG would provide more then enough ampacity @ 55 amps.  8 AWG has a rating of 40 amps but of course, the insulation temperature rating affects all wire ampacity.  If flexibility is a concern, there is always copper braid and tubing insulation.  https://www.pacergroup.net/content/Tinned-Copper-Braid-Spec-Sheet.pdfhttps://www.mcmaster.com/products/electrical-insulating-tubing/expandable-electrical-insulating-tube-sleeving/
There are many choices.JimLogic: Method used to arrive at the wrong conclusion, with confidence.  Murphy 

    On Thursday, October 17, 2024 at 10:48:54 AM CDT, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:   

 If you are running an ART13 with its DY17 dynamotor, what size wire are you using between your 28 volt supply and the input to the DY17?  My power source, a 125amp switching supply with a pair of auto batteries across it, voltage sags at initial keyup and causes the ART13 to double click the antenna relay before staying in TX.  It is only a fraction of a second, but enough to worry me. I thought what I am using would be big enough based on how it filled the solder cups in power plug.  The dynamotor is a Ballantine manf. unit with little to no run time as brush and commutator wear seem to show.

Charlie, W4MEC in NC
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