psu design

[mrphotodude]

i started designing a psu in illustrator...(im a graphic designer...i can do that software very quickly, and cannot install any other software on my workstation at work...which is where i like to build stuff  )

i was thinking there may already be something out there in self etch that would save me the time...

i was looking for something to run 1 or 2 12a_7....
basically a mila and a 1 bottle design.

wanted to have a rectifier for the b+ and filter...
rectifier and filtering for 6vdc(could even do 12vdc)
and 48vdc phantom power.

here is the trick...was trying to do it with 2 transformers max.
hoping to use a single tranny with a high secondary and filament secondary.

i'm not so much looking for HOW to do this..i can get that taken care of...
i am looking for something already done or close to it that i can modify to save myself the time.

Really wanted to just burn a few pcb's and be done or modify, then burn.
Any links/suggestions helpful.....not wanting to do turrets and multiple boards...

 

[michal_k]

perhaps a g9 PSU? You'd have to extrack it from the main PSB but that shoudn't be a problem.

 

[mrphotodude]

i looked at that one, but i felt i would be better off redesigning one over that, with its high parts count and long layout.
was hoping for something basic and small.

is there any issue with pulling some juice off the B+ rail in the pssu and knocking it down to 48 vdc?

 

[mrphotodude]

i wonder if i would be better off adding an extra section onto a gren psu v6 for hv caps...
run 12-0-12 into the green psu and the hv secondaries into the added portion for the b+?

but i think most of the 12vac secondaries on the trannies i have are not center tapped..

 

[michal_k]

is there any issue with pulling some juice off the B+ rail in the pssu and knocking it down to 48 vdc?

That probably isn't a good idea. If you want  to make simple HV psu which is a rectifier and crc filter the output voltage for b+ would vary if you engage +48(bigger current draw). You'd have to use some sort of regulator which brings you back to something similar to g9 psu part count.

i wonder if i would be better off adding an extra section onto a gren psu v6 for hv caps...
run 12-0-12 into the green psu and the hv secondaries into the added portion for the b+?

Not sure about this one, but I see no reason it would't work.

 

[mrphotodude]

yeah..i was wondering if tapping off the b+ rail would swing down the hv too much when i engaged the phantom..
phantom would probally be 100vdc for a bit before pulling down to 48...
swinging like ...well...a swing..
i am going to try putting a 12-0-12 into a green v6 and see if i can adjust a few things to get a 12vdc and 48vdc...
get me on the right track