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