[R-390] OT: 30V regulator?

[Roger Gibboni]

How about using a 28 or 30 volt wall wart from a computer?? The 9 volt bats
are a good idea- Roger WA3YTM



-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of wabate
Sent: Monday, September 17, 2007 2:36 PM
To: n4buq at knology.net; R-390
Subject: Re: [R-390] OT: 30V regulator?

Barry,

I have a Triplett as well, but a different model.  The 30V battery is 
tough for me to get.  So I installed 4 nine volt batteries in series. 
They last forever.  The point is that you don't have to regulate the 
power supply, if you want to build one.  It isn't that fussy.  Why 
complicate it?

73,

Bill, K3PGB

Barry wrote:
> Not much on the list for a while so would like to ask an OT question.
> 
> I have an old Triplett 630-NA meter and would like to use the ohmmeter
section.  It takes a 30V battery (which is still available) and a 1.5V D
cell for ohm functions.  I was thinking of making a small 30V regulated
powerr supply and house it inside the cabinet.  This is an older, kind of
rough condition meter that I keep because my father gave it to me so
modifying it doesn't bother me too much.
> 
> I was thinking of a 24VAC xfmr with a full-wave bridge, a cap, and
possibly a 3-terminal regulator but didn't know if a 30V 3-terminal
regulator is available.  Also, would like to make a 1.5V power supply for
the D cell, but not sure if a 1 or 1.5 xfmr could be had as well as whether
a 1.5V regulator is available.
> 
> Any thoughts?
> 
> Thanks,
> 
> Barry - N4BUQ
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