PASS principles super tweeter amplifier

[Zen Mod]

4db of tweaking is safe area

2n2 - I can't see nothing wrong with

however , my experience is to always also try double value

 

[rickmcinnis]

I havesome of the FAIRCHILD devices that were for the F5 build I never started.

Would these be suitable for this amplifier?

 

[Zen Mod]

yup

which ones ,exactly?

 

[rickmcinnis]

They are FQA12P20s.

What do you think?

 

[Zen Mod]

more than adequate for task

 

[Dennis Hui]

Isn't FQA12P20 a P-channel part?

Perhaps you're thinking of its n-channel complement in the F5, the FQA19n20c?

Thanks,
Dennis

 

[Zen Mod]

sorry

of course you got it right .... I just ignored polarity , looking at xconductance , Rds and capacitances

in fact - why Rick asked for P part , in first place ...... just confusing poor ZM

 

[Dennis Hui]

Since Rick mentioned the F5, I wonder if he just typed the wrong part number.

Cheers,
Dennis

 

[rickmcinnis]

You know how often I get this stuff wrong. I saw the P in the original and thought that was what is being used.

I have the N version of the FAIRCHILD, also.

The question is: will there be any good difference between using these or should I get the specified MOSFET? At two dollars a piece I can afford to get the IRFP240s if they will work better! (big spender)

Thanks,

 

[Zen Mod]

difference (if there is any) isn't worth of tinkering

 

[rickmcinnis]

I was hoping you were going to tell me I was the luckiest guy in the world to have those devices in my possession.

Always hoping ...

Thanks and take care,

 

[Zen Mod]

you know my approach - concept (schm) and decent workmanship is what's singing

more precious details and insights in my flawless methods are published here

 

[rickmcinnis]

Those fellows have a unique approach!

Well done animation. I enjoyed that!