[Elecraft] K3 / K3S Power Supply

[Charlie T, K3ICH]

Yep and unless they've changed their design recently, all their linear regulator supplies have as their heart,  the venerable '723 chip for voltage and current regulation.  If I remember correctly, that IC was introduced about 50 years ago !  
I know just about everybody makes 723's now, but who was the original supplier?  I'm guessing Fairchild since I think it was originally the µ723.

73, Chas

-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Chester Alderman
Sent: Thursday, November 26, 2015 9:23 AM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 / K3S Power Supply

I have a RS-70A that I turned on 13 years ago; it has 'suffered' through many house power losses here in the country, but has not missed a beat over the years. Except for my amplifier, it powers everything else in my ham setup. IMO, the Astron's are unbeatable!

73,
Tom - W4BQF