It is like this. You do the best you can with the parts you can afford or find.
There is no perfect solution or answer. Some power supplies sag more that others
due to the transformer and many times due to the house wireing.
If you must have a power supply that does not sag so much and not have some
sort
of complex active regulation, you need to go to choke input filter and full
wave rectifier.
Start with an old powersuppy from an AM transmitter. It will be large, bulky,
heavy and
costly.
73
Bill wa4lav
________________________________________
From: amps-bounces@contesting.com [amps-bounces@contesting.com] On Behalf Of
Gary Schafer [garyschafer@comcast.net]
Sent: Sunday, June 12, 2011 11:41 PM
To: 'Mike'; 'Richard Solomon'; amps@contesting.com
Subject: Re: [Amps] Voltage Doubler Regulation
This circuit was referred to on here a few years ago. It will buy you
nothing as far as regulation. It will have poorer regulation than a standard
full wave doubler. Of course you can increase the value of the output
capacitor and improve it but you can also do that with a standard full wave
doubler.
Look at the circuit closely. It is two half wave doublers feeding an output
capacitor.
73
Gary K4FMX
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]
> On Behalf Of Mike
> Sent: Sunday, June 12, 2011 5:26 PM
> To: 'Richard Solomon'; amps@contesting.com
> Subject: Re: [Amps] Voltage Doubler Regulation
>
> Richard, take a look at this web page figure 2. It takes more diode
> strings
> but gives very good
> performance over what the standard handbook FWD circuits we've been
> accustomed too! Use 6a10 diodes
> from mouser...cheap... http://208.190.133.201/lit/4x8/index.html
>
> Take note C4 is critical for best regulation and it only takes ~10-
> 20ufd. An
> oil filled cap
> or one of the russian poly hv caps listed on ebay works fb.
>
> The lower the sec R of the high V transformer the better, very
> important! A
> boat anchor tranny with 50 ohm
> Secondary will not work well ;-))
>
> Hope this helps!
>
> Mike, K4EAR
>
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]
> On
> Behalf Of Richard Solomon
> Sent: Sunday, June 12, 2011 2:12 PM
> To: amps@contesting.com
> Subject: [Amps] Voltage Doubler Regulation
>
> I would like to look at ways to improve the Voltage Regulation in a
> Voltage
> Doubler Circuit.
> I tried Google, but didn't get much on the actual calculations involved.
>
> Since we have certain givens; such as The AC Line is what it is, the
> Plate
> Xfmr is what it is, the only variable in the equation would be the
> Capacitor
> value. Am I correct in that assumption ?
>
> Can anyone point me to a reference that I can use ?
>
> Thanks, Dick, W1KSZ
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>
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