Power supply for my Aikido mixer

[apog]

Hi.
i want to ask a question about the power supply of this aikido mixer:

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the mixer will be stereo so i will make twice this circuit (4 tubes ecc82 totally)
the high voltage is 150Vdc.
the secondary of my psu is 115v ac / 300ma.
Do you think the current of 300mA for those 4 tubes ecc82 of the circuit will be sufficient?
Sorry for my poor English

Thanks a lot!

 

[apog]

nobody?

 

[dmills]

Well, 300mA @ 150V is 45W, and there is no way the output valve will dissipate 15W without killing itself in short order, so the output stage must be running at way less then 100mA, it will be fine.

I make the intput stage 5mA (75V/15K) nominal, so hardly significant.

I would suggest that maybe a resistor in series with the output would be a good plan so as to avoid possible problems if driving a capacitive load.

Regards, Dan.

 

[apog]

thank you so much for your help!!
i understand that 100ma will be fine for 2 channels!

something else.
Someone told me that linear pots are more suitable for mixers than log pots.
is that true?

thanks again!

 

[dmills]

Not for level controls, they want to be log (really audio taper).

Things like pan opts and eq controls usually need to be linear to put the 0 position in the middle, but you don't have any of that stuff.

Regards, Dan.

 

[apog]

Thank you!