[R-390] OT: 30V regulator?

[kenny]

Barry wrote:
> I was thinking of a 24VAC xfmr with a full-wave bridge, a cap, and possibly a 3-terminal regulator but didn't know if a 30V 3-terminal regulator is available.  Also, would like to make a 1.5V power supply for the D cell, but not sure if a 1 or 1.5 xfmr could be had as well as whether a 1.5V regulator is available.
>
> Any thoughts?
>
>   
I have recently been searching for a Voltage Regulator for a 50-volt 
supply that I want to build. So far I have had no luck at all and may 
have to consider using transistors to help with regulation although on 
the circuit that I found one of the author's first comments was "the 
regulation is not as good as with a IC regulator" so I'm probably back 
to the drawing board on that one.

Someone suggested the LM317...Yes I would agree. They are cheap and easy 
to obtain and you can adjust the voltage. Even though the 30-volts is 
only used on the high-ohms range I would go ahead and build it if I were 
you as it would bug me if I had a piece of equipment that I couldn't get 
full use of (I expect many of us are like that that's part of the reason 
we embark on restoring our BA's). Regarding the 1.5-volt supply...I 
don't recall the type numbers because during my search 1.5-volts did not 
interest me but I did notice many regulators that can be adjusted down 
to this voltage.

Regarding the supply that I want to build...My wishlist is for it to be 
fully regulated and stable 50V and adjustable over a small range 48-51V. 
I don't want to buy one, I want to build one but I just cannot find a 
suitable regulator. Anyone have any ideas on where I can find a 
regulator for this voltage OR a really good transistor (Bipolar or FET) 
circuit?

Regards,

Ken