[R-390] OT: 30V regulator?

[Dave Maples]

All: I believe an LM723 can be used in a series-regulator fashion to
regulate well above its ratings.  Please see the National data sheet for
details.  It may require an external pass transistor.

Thanks,
Dave WB4FUR

-----Original Message-----
From: r-390-bounces at mailman.qth.net
[mailto:r-390-bounces at mailman.qth.net]On Behalf Of Jim Shorney
Sent: Monday, September 17, 2007 8:28 PM
To: r-390 at mailman.qth.net
Subject: Re: [R-390] OT: 30V regulator?


On Mon, 17 Sep 2007 14:27:48 -0400, Steve Byan wrote:

>The LM317 will handle up to 40 volts on the input, and can be
>configured to supply 30 volts. If the unregulated input is above 30
>volts, then you'll need an LM317HV.

And here's a handy page to calculate the resistor values, for the lazy among
us:

http://www.muzique.com/schem/lm317.htm


--
Ham Radio NU0C
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HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/

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