[Milsurplus] [armyradios] ammo can power supply ideas

[jcoward5452 at aol.com]

Folks,
 I forgot to mention this is a linear supply, not a switching type.
 Sorry for the added addition!
 Jay


-----Original Message-----
From: jcoward5452 at aol.com
To: armyradios at yahoogroups.com; milsurplus at mailman.qth.net
Sent: Tue, 2 Jun 2009 7:01 pm
Subject: [armyradios] ammo can power supply ideas








Greatings Folks,
About 2 months ago I was at the Dump tossing some scrap metal into the
big bin,when a fellow recycler came over to me and offered me an ammo
can (7.62mm) and said I looked like I could use it.(Looked like?)
Well,of course I can use just about anything for free,so I accepted and
thanked him for his gift.Well, at about the same time my VRC-7 project
was coming together and I had a +24V DC Power/Mate Corp .supply to
operate the radio and I thought the ammo can would make a great
enclosure for the p.s. Well, time ran out and the West Coast MRCG event
was upon me and I did not get this idea into the hardware
stage.Interestingly enough there was a power supply in an ammo can at
the meet so my idea was not original but now validated.
Here's what I have in mind since I have a bit of junque box parts to
put to good use:Supply will be mounted on a plywood base on standoffs
with an operating panal above,all made up like a sandwich.I will use
velcro to stick the module to the ammo can floor.(I don't want to drill
any holes in the can).The panal will have the usual on/off swi
tch,fuse
holder,pilot lamp, output connector and a voltmeter that a coworker
gave me yesturday( mil aviation type,full scale 30 volts,working).This
should look quite Mil-ish when done and thus hide itself in a display
environment by looking like it belongs there.
Now, here's the question to the group having never tried this but
maybe someone has:
I would like to make this a more versitle supply by having two output
voltages available: +12 V and +24 V.My thinking is that there are two
115V AC primary windings so that in parralel one can operate on 115V AC
or in series one can utilize 230V AC and get the +24 V DC out.If I
connect in series and just apply 115V AC will the supply deliver +12V
DC? Does the regulator pcb need to be modified to do this? Has anyone
tried this and what sort of trouble will I get myself into?I can accept
ratings changes and all that.Just don't want to fry the supply trying
to find out.
Thanks,
Jay KE6PPF




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