what kind of transformer for a Z#9

gionag

Member
Paid Member
2007-06-01 3:33 pm
hi guys,
i'm building the PS for the ZenV9. What kind of toroid i have to use ?

Mr.Pass, had used a 300VA 18x2V, But i seen guys who had used a 35x2V or other voltages.

With the original unregulated ps Board, what transformer can i choose ?

Thanks !
 

steenoe

Member
2004-03-23 10:43 am
gionag said:
.... ;)

i'm an idiot ! i'm thinking about only SERIES, not PARALLEL :D

for the parallel, i still use a 300VAC ?


Thanks a lot :D i'm a n00b :D

I guess you can do it with a single 300VA (it doesnt matter if its the 2x18V or the 2x35V) If its a good quality unit it should be ok. I am using two pcs 2x18V, 300VA's in mine.

:)

n00b's are very welcome:)
 

steenoe

Member
2004-03-23 10:43 am
gionag said:
i can't find anyone selling a 2x18V 300VAC trasformer.

Where i can look ?

Thanks a lot

Maybe someone closer to you can answer that;) Most electronic suppliers, carry toroid's.
Buying two of those with 2x18V secondaries is a very good choice.
You can build many of the Pass amps with such a pair. Almost all of the PassDIY and F amps use them:)

:)
 

gionag

Member
Paid Member
2007-06-01 3:33 pm
another think.

the 300VA transformer is for both channels or a 300VA toroid each channel ?

If i'm right, Mr.pass, use a CCS in the zen #9 and the current is fixed to 2A, then a good toroid for ONE channel is 36 Volt X 2 Ampere = 72VAC.

It's true ?

thanks a lot
 

gionag

Member
Paid Member
2007-06-01 3:33 pm
ahem, excuse, maybe i was too confusing in my explanation:

I need to know how much VAC i need for each channel...
it's better 1 toroid of 300VAC, or is enough 1 toroid of 150VAC per channel ?

(i don't want to use a single transformer for both channels)


Thanks a lot
 
VAC = alternating current voltage
VA = voltage times current ~power

Rail voltage of the V9 is 50 volts, 36Vac rectified.
2 Amps times 50 volts = 100 Watts.
150VA works, but is not advisable, a 225VA would be the minimal transformer value.
300VA is more common, price difference between a 225VA and a 300VA transformer is not worth the saving.
 

gionag

Member
Paid Member
2007-06-01 3:33 pm
i did a lot of order from this site... they have a very good things.

But, i've found a great transformer factory near my homeplace that is awesome.

For 2x300VA i'll pay only 100 euro and they surround the transformer with a special EMI foil that is a manna for audio equipment.

Thanks for the information anyway.