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[80hinhiding]

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[JohnRoberts]

voltage doublers are widely used for low current supplies, at higher current they become less attractive.

JR

 

[scott2000]

I also wonder if a AC/DC adapter might be useful for a small project like a tube distortion pedal or something like that.. 24VDC 1A for instance.. then perhaps multiply the DC rail for the plate current, and split the main rail for the heater.

A

I think so. Some printer power supplies have 2 rails as well. I have one here that has 16vdc and 32vdc  and over an amp each...

 

[scott2000]

voltage doublers are widely used for low current supplies, at higher current they become less attractive.

JR

It seems this was somewhat common in some older (50's?) stuff (B+).  Was the technology not up to speed back then or was this used for convenience or some other reason??? Or is that still considered low current?? 150-250vdc?