Stax pro bias

[factory2nd]

Hi, i'd like to convert my speakers tube amp to a stax amp, i need to supply 580V for the pro version, could anyone help me designing a multiplier from 230V AC to 580V DC ?!?!?
i'm getting lost in cap value and so on...

 

[PRR]

from 230V AC

Directly from the power line to your head? That's dangerous. Use a transformer.

 

[kevin gilmore]

voltage trippler into a 10m90s 5 ma into 580v of zener diodes. 5 meg ohm final resistor to headphones.
actually is safe because of the resistor.
same way stax does it in srd7 230v version. except stax does not regulate the final voltage.

 

[factory2nd]

Directly from the power line to your head? That's dangerous. Use a transformer.

Obiouvsly, 230v to 230v

 

[PRR]

Obiouvsly, 230v to 230v {to 580V DC ?!?!?}

Or 230VAC to 414VAC CT, ignore the CT?

230VAC will rectify straight to 322VDC, doubled is 644VDC.

i'm getting lost in cap value and so on...

Cap values depend entirely on load current. How much is it?

And allowable ripple. How much is that?

Is there a published STAX amplifier/bias schematic to "study"?

 

[factory2nd]

i'm thinking at this

 

[chinsettawong]

You definitely need a 5M resistor in the path to limit the current flow.

 

[starcat]

Exactly, 5M resistor needed.

And I will follow what Kevin Gilmore is saying above.