[ARC5] Vibrator Power Supplies

[Peter Gottlieb]

It is possible to design a nearly bulletproof switcher using fets, but the designer has to know what they’re doing. 


Peter

> On Nov 21, 2017, at 1:38 PM, Bob kb8tq <kb8tq at n1k.org> wrote:
> 
> Hi
> 
> Well, I can tell you that the normal vibrator supply typically had better reliability 
> in the field than the early germanium based “transistor” supplies.
> 
> Bob
> 
>> On Nov 21, 2017, at 12:06 PM, Dave Jackson <cjack93907 at razzolink.com> wrote:
>> 
>> Thanks Bob. I've been curious as to how the vibrator design compares with
>> the solid state MOSFET SMPS design as far as the contact life vs. sparking
>> (with the corresponding contact erosion).  This will help answer my
>> questions.
>> 
>> Sincerely,
>> 
>> Dave WA4OBJ
>> 
>> -----Original Message-----
>> From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On
>> Behalf Of Robert Nickels
>> Sent: Tuesday, November 21, 2017 8:00 AM
>> To: arc5 at mailman.qth.net
>> Subject: Re: [ARC5] Vibrator Power Supplies
>> 
>> A lot of effort - both science and engineering - went into the design of the
>> low-cost DC-DC converter of the early 20th century, aka the vibrator power
>> supply.   As the leading manufacturer of vibrators,  P.R. Mallory Co. put
>> out a comprehensive design manual in 1947 that may be of interest to anyone
>> seeking to understand the design of such power
>> supplies: www.tubebooks.org/Books/mallory_vibe.pdf
>> 
>> 73, Bob W9RAN
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