[450] Fwd: Today's project

[George Andrews]

Bob,

 

Looks very professional! Quite a craftsperson you are.

 

George

 

From: 450-bounces at lists.vhfwiki.com [mailto:450-bounces at lists.vhfwiki.com]
On Behalf Of Bob
Sent: Sunday, March 10, 2013 7:13 PM
To: 450
Subject: [450] Fwd: 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.

Inline image 1

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

Inline image 2

The cutting didn't go to badly this time!

Inline image 3

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.

Inline image 4

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

Inline image 5

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

Inline image 6

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.

Inline image 7

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

Inline image 8

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.

Inline image 9

More overview from back...

Inline image 10

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

Inline image 11

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.

Inline image 12

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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