Regulated psu for tube preamp

[wuffer]

i was thinking if it would be possible to make a regulated psu for an tube preamp..

it should have 6v 0.8a and 40v 1a.. ground is the same...

is it possible??

 

[Brett]

i was thinking if it would be possible to make a regulated psu for an tube preamp..

it should have 6v 0.8a and 40v 1a.. ground is the same...

is it possible??

The heaters I understand, but 40V at 1A? Huh?

Of course you can do a regulated PS for a tube preamp. I like shunt regs best myself.

 

[amperex]

I do not know of any tubes that operate linear at 40 volts plate. TI made a floating type 3-terminal regulator that operated up to 120 volts output @ 1 amp.

 

[wuffer]

thanks..
tubes are 6J5-GT

 

[SY]

You'll need a minimum of 100V on the plates, which means a supply in the 200-400V range. Unless you're going to run 50 of them, you don't need anything like 1A.

 

[wuffer]

i have heard it with a normal psu with big caps and 40v and it sound good, very good 😎

can se the transformer is 24-30v 1a and should be 32-42v after the rectifier and caps so i want the same just want to try the regulated psu instead 🙂

 

[SvErD]

I bet it's this one, plays very nice by the way even though it's not textbook........😎

http://www.diyaudio.com/forums/showthread.php?postid=131443#post131443

 

[wuffer]

I bet it's this one, plays very nice by the way even though it's not textbook........😎

http://www.diyaudio.com/forums/showthread.php?postid=131443#post131443

looks like the one i want to build 😎 the bastard 😎

 

[SvErD]

Jepp, it's the B*A*S*T*A*R*D from Ny Elektronikk. I built mine 10-12 years ago and still use it i one of my systems.

I use some old L63 tubes by the way.

 

[wuffer]

sounds good 🙂
i have the construction manual here and 1 pcb..
i would go after the 6J5-GT tubes.. those i can get..

what pots are you using for volume

 

[SvErD]

I'm using a Noble 50k, but any good 50-100k pot/attenuator will be good.

 

[wuffer]

thanks im thinking of an alps 27 with motor..

back to the psu.. anyone???

 

[SvErD]

This for ex:
http://www.diyaudio.com/forums/showthread.php?postid=743345#post743345

Use bigger caps

 

[wuffer]

looks nice but im not sure how i get lower voltage out of it...

 

[SvErD]

The string of zeners D6-8 sets the voltage

 

[wuffer]

thanks.. i can read diagram and build from a diagram but when i shall change components and so on im lost so if there is any one that could draw a diagram i would be very gratefull

 

[SvErD]

If you use the diagram in the thread linked to above and use one 39v zener or 3 x 13v zeners you should get ~40v.
Use a 35-40v transformer.

 

[wuffer]

if i change D6-D8 with 3 zener at 13 volt i would get 39 on the output... and no other component should be changed

but the mje3439 cant i get in denmark.. 🙁

 

[SvErD]

The transistor is not critical, use a BD239 f.ex.

 

[wuffer]

thanks a lot.. i think i know enough to make the psu..