[Milsurplus] [ARC5] Quieting A DC/DC Converter

[Jim Whartenby]

These are interesting modules Dave.  Several are available for under $5 each with free shipping.  All seem to be rated for 40 watts so at the maximum 390 VDC output, one has 100 mA available.  Can't roll-your-own for twice the money!
Does anyone have experience in using this module with 28 VDC input and around 250 VDC output?  Wonder what the efficiency is in this condition?  Operating at 75 kc, it should be as quite as a church mouse and easy to filter.Jim

      From: Bob kb8tq <kb8tq at n1k.org>
 To: David Stinson <arc5 at ix.netcom.com> 
Cc: ARC-5 <arc5 at mailman.qth.net>; milsurplus at mailman.qth.net
 Sent: Sunday, January 14, 2018 6:24 PM
 Subject: Re: [Milsurplus] [ARC5] Quieting A DC/DC Converter
   
Hi

One of the “interesting” things about boards like this are the empty slots on the board 
for other parts. In some cases the performance can be improved by putting those parts
on the board. In other cases the result is a pretty dramatic burst of smoke ……

Bob

> On Jan 14, 2018, at 5:35 PM, David Stinson <arc5 at ix.netcom.com> wrote:
> 
> Here's a listing for these DC-DC thingies.  It's
> 390 VDC max.
> 
> https://www.ebay.com/itm/142555893852
> 
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