Thanks gentlemen. The 15V transformer step-up quadrupler schematic looks interesting. I will need a simple, reliable and voltage step-down design that is suitable for freebies like me without restoring to circuit design calculations.
Wow! The Grebre, what a beauty! These are nothing short of being spectacular in workmanship
Thanks! Your calculations in the two articles are very interesting. I will have a good read.
I have a few UX201A, type1A and type 30 valves. All of them are good even they are nearly 90-100 years old. Once I lashed up a regenerative reciever using two UX201A and one type 30 valve using two audio interstage coulping 1:3 transformers. It worked very well.
The UX201A is highly desirbale for audiophiles and it fetches very high price on ebay. The audio fetishists claim it has a unique sound:
http://vinylsavor.blogspot.com/2013/...1-circuit.html
There is something about the orange glow of the UX201A. It is like watching the ember glow of a fireplace while you are sitting on a rocking chair in a cold winter, you dont get this charm and aura from modern tubes.