[ARC5] R1155: Regulated B+ Supply

[Bruce Long]

DaveYou could replicate the functionality of the HV regulator with a high voltage FET or bipolar, a zener a few resistors and maybe a cap or two.   Add another 39cent transistor and three resistors and you get SC protection.
I would rather do that than use a more specificity- less generic perhaps hard to find ( in the future) part although I do admit use of a special high voltage regulator does significantly reduce design time, design risk and circuit board space.
I do not mean to be overly critical here.  I was burnt once in industry by using a similar rather nice but rather specialized part whihc then became unavailable so I am rather serious about avoiding parts that are not widely available.
For quality one it does not matter.  Still if I design and build something for personal use I like the idea of being able to repair it in the future with easily available parts.


      From: David Stinson <arc5 at ix.netcom.com>
 To: milsurplus at mailman.qth.net; ARC-5 <arc5 at mailman.qth.net> 
 Sent: Saturday, May 13, 2017 2:15 PM
 Subject: [ARC5] R1155: Regulated B+ Supply
   
Here's the diagram for the regulated "Low-B+"
135V Plate supply for the R1155.  I think I'm 
going to be "best friends" with these neat
HV regulators.

73 Dave AB5S
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