[Milsurplus] AN/GRC - 9 Power supply question

[B Smith]

The 24 volt power supply sounds like a plan to me 
but some of the newer power supplies will kick off 
at Dynamotor start up, this
sometimes can be cured by inserting a start up 
resistor of an ohm or two  until the dynamotor 
comes up to speed, then switch
the resistor out of the circuit. Also beware of 
wide band hash caused by some of the switching 
power supplies. A high power resistor can be 
fabricated out of a  #16 or 18 wire, just keep 
winding the wire on a form  until you run out of 
wire or you are get tired.   :-)

73 C U on at Field Day we will be on using mil 
radios also.

breck k4che

--------------------------------------------------
From: "Greg Mijal" <bluebirdtele at embarqmail.com>
Sent: Monday, May 30, 2011 5:14 PM
To: <milsurplus at mailman.qth.net>
Cc: <boatanchors at mailman.qth.net>
Subject: [Milsurplus] AN/GRC - 9 Power supply 
question

> Hi:
>
> I am going to run up my GRC-9 rig for my club's 
> field day efforts next month.
> It's going to be a demo for old technology 
> tire-kickers sitting next to a modern SDR rig.
> My power choices are limited to the hand crank 
> generator or energizing the 24 volt dynamotor 
> box that came with the rig.  It's the 12 volt 
> version of the supply that is called for in the 
> GRC-9 system spec's.  Since I am not Arnold 
> Swarzenneger I won't be cranking the "Radio 
> Coffee".
>
> I found what looks like a low cost replacement 
> for the 24 volt requirement for the dynamotor. 
> It's a brand new switch mode power supply that 
> puts out 24 vdc @ 14.6 amps.  Inrush protection 
> of up to 50 amps.  all the spec's may be read at 
> Ebay auction # 310312941221. Pleas don't email 
> me back something along the lines of " just put 
> two 12 v batteries together"  There are too many 
> disadvantages to doing it the easy way.
> Your "expereience" based input is most 
> appreciated here.
> 73's
> Greg
> WA7LYO
> Kinston NC
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