[Milsurplus] O.T. Power Supply Design

[antqradio at sbcglobal.net]

I can see the need.  
If you have the choice between several different power transformers with various ballpark HT secondary voltages and several different value inductors and filter capacitors, which combination would give you the lowest ripple with the lowest capacitor peak charging current so that you don't over stress the full wave vacuum tube rectifier?
You can spend a day or two breadboarding the circuit and drag out the o'scope and whatever other test equipment and components you need for the various test or you can spend an hour or so simulating the circuit with the various component values and then select the best combination and build the circuit once.
Graphs and namograms may get you within 20% on a good day but a decent CAD program with good models will get you much, much closer on the very first try.
Design in the cubicle and verify in the lab 'cause you already know it will work.  Spent more hours at the bench doing load pull looking for instability and spurs then I care to admit too but the amplifier always made the power and efficiency specifications.  Stability under all output loads and all phases is a bit more difficult to prove.
Jim
      From: Dennis DuVall <duvallddennis at gmail.com>
 To: "kgordon2006 at frontier.com Gordon" <kgordon2006 at frontier.com>; k2cby at optonline.net 
Cc: Milsurplus at mailman.qth.net 
 Sent: Sunday, September 20, 2015 1:39 PM
 Subject: Re: [Milsurplus] O.T. Power Supply Design
   
Hmmm….

Need a computer program now to come up with a junk box power supply for a BC-348?

Don’t wanna be a Grinch here but maybe I’ve been in this game for too long….  :^(

Dennis D.  W7QHO
Glendale, CA

*****************


> On Sep 20, 2015, at 10:59 AM, Kenneth G. Gordon <kgordon2006 at frontier.com> wrote:
> 
> On 20 Sep 2015 at 13:53, k2cby at optonline.net wrote:
> 
>> I typed "Power supply design" into Google and came up with a link to
>> duncanamps.com/psu2/index.html. That site allows you to download for free a
>> really nifty program called PSU Designer II that runs under Windows and
>> simulates a power supply using either vacuum tubes or silicon diodes in
>> full-wave, half-wave or bridge configuration.
> 
> I have used that piece of software for several years, and find it to be 
> unusually valuable for such purposes as designing and testing proposed 
> designs.
> 
> One can "adjust" almost every parameter in the software too, including 
> adding rectifiers, with their parameters, that are not in the included list.
> 
> Furthermore, it can show you ripple voltage, peak currents, etc.
> 
> I very highly recommend it.
> 
> Ken W7EKB