[450] Today's project

[Michael Aurio]

is there something different different from the first time you sent it??
 Date: Sun, 10 Mar 2013 19:00:59 -0400
From: n1ujs at toast.net
To: n1ujs at toast.net
Subject: [450] Today's project

Having acquired the 100 amp switching supply, next step is to make it useable in the shack.  Metering, power connections, etc. aren't part of the package when you get one of these things.  Having a "temporary shack", I needed a way to add these things without building it all into the shelf for now.  Further, I needed to do it in a way that would allow me to use it at the full 100 amps if necessary, so it had to be heavy duty.  Here is how I did it.



Two meters nestled nicely into the front of an old speaker cabinet.



The cutting didn't go to badly this time!


5/16 binding posts.  The two on top are positive, the two on the bottom are negative.  I still have to mark them, and make a cover for the back for after all lines are connected.



Here are the binding posts from the inside, keep in mind all connections need to support the 100 amp concept.



Overall, looks fairly professional for junk parts (rubber feet even!)....only the meters were purchased, $12.00 each online.



You can see here the #4 cable in place to plug into the output ports of the supply which will be mounted to the four pads on top.  They route into the box via teflon bushings.



Another view of the top.  The extra bushing is to route the case ground wire.


An overview of the inside.  Note: everything giant and bolted for power connections...those lugs to either side of the shunt (center) were formerly used to connect the 1/0# ground wire to my towers at the old shack.



More overview from back...



....and from the front.....


Here is the shunt set up....the main reason this needed a box to begin with.  This must be well isolated and firmly mounted as the entire thing is "hot", both polarity AND temperature.  Without it, there would be no current measurement.



A close up of the shunt and it's mounting.

So there it is.  Still some finishing touches to do, maybe meter light, maybe a few switches, but overall ready to mount the Powermax 100 amp supply to and put into service.  Hope you enjoyed the tour!


Bob N1UJS




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