[Elecraft] OT: Popular power supply query

[Bill Tippett]

Odds are the problem is either the LM723CN controller or 2N5886G pass
transistors (or both).  The controller is even socket mounted for easy
replacement.  When I had a failure in my RS-35M a few years ago I
ordered spares for both.  I often wonder how many things wind up in
our landfills that need nothing more than a simple component!

73,  Bill  W4ZV

You can rebuild Astron supplies and there's even an article and circuit
boards available.

The article:
<http://www.bwcelectronics.com/articles/WP20A190.PDF>http://www.bwcelectronics.com/articles/WP20A190.PDF

The circuit board:
<http://www.farcircuits.net>http://www.farcircuits.net
search for PS-15D-122 $5 and don't forget to add $5.50 for shipping.


On Mon, 11 Jun 2012, Jack Berry wrote:

 > Bill,
 >
 > Just added an Astron VS-35M to the shack after nearly 20 years with a RS-35m
 > which is still working like new. I went with the variable supply so I could
 > dial
 > up the output voltage to meet charge requirements for a 12V gel cell.
 > I wouldn't go to any switchers for fixed service if I could avoid it.
 > The Astron linear is hard to beat - simple, quiet (in db's and rf) 
and heavy.
 > Good switchers are fine I'm sure but when I looked around online I saw a lot
 > more variability on opinions and experiences with switchers. 
Astron is highest
 > rated overall and reasonably priced for a 20+ year service life.
 >
 > 73,
 >
 > Jack - WE5ST
 >
 >
 >
 >
 >
 > ________________________________
 > From: Bill <b... at w2blc.net>
 > To: elecraft at mailman.qth.net
 > Sent: Mon, June 11, 2012 6:38:34 PM
 > Subject: [Elecraft] OT: Popular power supply query
 >
 > Time has come to purchase a new power supply - the 33 year old Astron
 > has passed on. What are the popular and reliable supplies being used
 > these days? If there are some to seriously stay away from, please so state.
 >
 > Thanks,
 >
 > Bill W2BLC
 >
 >