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bassnkeys 26th March 2012 11:57 PM

F5 Transformer
I have a friend with an Antek AN 8225 transformer.
Would this be good to power an F5?
It is listed at 800VA
2 outputs
25V 16Amps
I found their info page... looks good to me but I'm no engineer.
Antek - AN-8225

Dennis Hui 27th March 2012 01:00 AM

The voltage is high for the standard F5, but should work well for an F5 Turbo:

AudioSan 27th March 2012 01:04 AM

this is just fine :) if the J-fets is cascoded.
as in F5 with dual outputs, or F5 turbo.

Russellc 27th March 2012 01:09 AM


Originally Posted by AudioSan (
this is just fine :) if the J-fets is cascoded.
as in F5 with dual outputs, or F5 turbo.

Even without cascoded j-fets. Risky, but Mr Pass says they will take close to 40 volts before breakdown....I am going to cascode mine however!


AudioSan 27th March 2012 01:24 AM

yes. it migth do :) but i'm not the one to recommend it :D

bassnkeys 27th March 2012 03:32 PM

Thanks, I think I'll order a new one... 18v.

AndrewT 27th March 2012 03:35 PM


bassnkeys 27th March 2012 04:49 PM

I found one this... seems about right to me. Is that enough current?
Electrical Characteristics

Outputs2x Power300VA Output VoltageCurrent 18V8.3A

Bksabath 27th March 2012 05:48 PM

I wuld go for the first one if you already have it
I have been runnung a 2 24 secondary on F5 since last August with no problem.

I will go for twin outputs and big bias if sinks let you

But is your personal choice so I would first find out what output volltagge you need and If you are going to be hapy with small ones you can send me the big traffos for disposall.

bassnkeys 27th March 2012 07:54 PM

Now I am completely confused. My Pass schematic calls for rail voltages of 23-25v and 8amps of continuous current with peak current up to 10amps. I thought that the tranny my friend has looked like just the ticket but some think it's too high voltage???
I do have a solution though. My friend is a pro guitar amp constructor... perhaps I will have him build the power supply.

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