[Milsurplus] GRC 9 power question

[WA5CAB at cs.com]

Or alternatively pull the chassis out of the cabinet and check the FLA on 
the dynamotor nameplate.  Triple that and add 2 or three amps for the 
vibrator supply and the relays.  The problem with solid state converters is that 
their surge and continuous ratings are typically almost the same.  If you 
can't come up with a DY-88, a better solution is probably the two 12 volt 
batteries John mentioned and a small converter to keep them charged.

In a message dated 3/19/2011 9:08:46 PM Central Daylight Time, 
jfor at quik.com writes: 
> You can estimate the inrush current pretty easily by measuring the (low)
> DC Resistance of the dyno input. Inrush = 24/DCR
> 
> You will likely need a beefy converter.
> 
> FWIW, I'd think about two motorcycle or car batteries in series.
> 
> Best,
> 
> -John
> 
> ===========
> 
> 
> >Hi:
> >I got a GRC 9 with a handcrank box and a 24 vdc dynamotor supply.
> >I think the easiest way to get this puppy on the air is running the DY 
> 105
> >24 vdc supply.
> >I have 24 vdc supplies running off of wall current but want to run the 
> rig
> >at Field day this year as a way to attract the club operators.
> >So my question is this: If I buy a  new 12 to 24 vdc converter, what size
> >should I buy? What kind of in-rush current draw should I prepare for?
> >Thanks
> >Greg
> >WA7LYO
> >Kinston NC
> 

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