Bottlehead Forum

Bottlehead Kits => Stereomour II => Topic started by: romarin on April 21, 2016, 04:43:16 AM

Title: Voltage numbers, Stereomour II
Post by: romarin on April 21, 2016, 04:43:16 AM

I suspect this is a dopey question at best, but I don't understand how the 160v winding on the power transformer in my Steromour II kit produced 388v of B+.  I'd be most grateful if someone could explain this magic to me. Apologies for my ignorance!   :o :-\

Title: Re: Voltage numbers, Stereomour II
Post by: Paul Joppa on April 21, 2016, 05:25:47 AM

The circuit is called a "voltage doubler" - Google has lots of information on it. I like it because it makes more efficient use of the transformer winding. There are a few other minor advantages as well.

Title: Re: Voltage numbers, Stereomour II
Post by: romarin on April 21, 2016, 06:29:17 AM

Thank you, Paul!  That's hugely helpful.  Looks like it's a Greinacher circuit, or possible a cascade of Greinacher cells, no?  Much obliged.

Title: Re: Voltage numbers, Stereomour II
Post by: Paul Joppa on April 21, 2016, 05:31:49 PM

Actually, I use the Delon bridge circuit, but same difference pretty much.

https://en.wikipedia.org/wiki/Voltage_doubler