[ARC5] Homebrew choke

[hwhall at compuserve.com]

I built a voltage doubler from the handbook and on my O-scope it was putting out a fullwave rectified waveform when loaded. I don't believe that loading wouldn't make half of the rectified pulses just disappear so that it suddenly looked like half-wave rectification.
 

 Wayne
WB4OGM

 

-----Original Message-----
From: AKLDGUY . <neilb0627 at gmail.com>
To: hwhall <hwhall at compuserve.com>; ARC-5 List <arc5 at mailman.qth.net>; milsurplus <milsurplus at mailman.qth.net>
Sent: Tue, Aug 16, 2016 11:58 pm
Subject: Re: [ARC5] Homebrew choke



OK, but I think that Handbook information simply illustrates that the waveforms are identical, being full-wave rectification, and takes no account of the loading on the supply. That is, it shows no-load or low-load conditions.


I have never understood why the voltage doubler circuit is called a full-wave circuit. The charging is half-wave to each capacitor, with the other capacitor having to supply the full load on that part of the cycle. Sure, the rectification is full wave, but so far as the output is concerned, it's the same as a half wave circuit. It really should be called a double-half-wave circuit.


73 de Neil ZL1ANM




On Wed, Aug 17, 2016 at 5:01 PM,  <hwhall at compuserve.com> wrote:

>
But because each capacitor in such a circuit is charged only on alternate half-cycles, with the other supplying the full load, the regulation, and hum, is going to be a lot poorer than it is in the full-wave bridge circuit
>

According to my ARRL Handbooks, the output waveform from a voltage doubler looks the same as the output waveform from bridge or center-tapped fullwave rectifiers.
 
 

 Wayne
WB4OGM





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