Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: ALK2MT on July 17, 2026, 03:05:23 pm

Title: Half Wave Voltage Doubler Rectifier
Post by: ALK2MT on July 17, 2026, 03:05:23 pm

Half-wave voltage doubler rectifier circuit.

I have a 20VAC 2 wire lead from a power transformer that I’d like to connect to a -/+15VDC to power a 5532IC for onboard effects like reverb. Has anyone successfully built a Half Wave Voltage Doubler Rectifier circuit using 7815 and 7915 voltage regulators?

I’d love to see your build layout and approach. Thank you!

Title: Re: Half Wave Voltage Doubler Rectifier
Post by: glass54 on July 17, 2026, 06:06:27 pm

Hi ALK2MT,
That is a terrible schematic for -/+15VDC supply and NOT CORRECT!! Scrap it now  :l2:
Do you need the complication of 3T regulators? You are only using a couple of NE5532 op amps  :laugh:
Consider the attachment borrowed from a Fender Blues Jnr, If you want more smoothing, consider split R50 and R53 to say 390R and put another electro 470u 50V at junction. This will give you 2 RC sections and add a little smoothing. My thoughts.
Regards
Mirek