[ARC5] Voltage Multipliers

[Rich Post]

Hi Wayne,

The simple answer is yes.  I have used multipliers to feed the high
negative for several scope-type devices when the main transformer was
replaced with one of the proper physical size that did not have the low
current high voltage tap.(Hallicrafters SP-44, BC-1031C panoramic adapter,
and PCA-200 panoramic adapter, two out of three given to me since the power
transformer was blown)  Worked fine since the current requirement was
tiny.  I usually added a resistor such as a 10K in series just in case my
multiplier shorted.  Capacitors were often high voltage ceramics of 0.01 to
0.1.

For higher current applications such as the quadrupler I used for the
command receiver, the caps were in the order of hundreds of uF.  I
mentioned the re-used 330 uF at 200 volts caps from a pair of junk personal
computer supplies. And that's the secret.  A multiplier intended for scope
high voltage cannot provide the current necessary for anything beyond a
couple of milliamps due to the minimal capacitor size.

73 de Rich KB8TAD

On Wed, May 3, 2023 at 4:57 PM <releazer at earthlink.net> wrote:

> Will the voltage multipliers designed for use in power supplies for CRTs,
> meant to develop thousands of volts, also work with lower input voltages,
> such as less than 100 volts AC?
> If so, I have a couple that I'd like to try out.
>
> Wayne
> WB5WSV
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