What FET to choose for HV source follower

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Koektrommel

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Joined 2013
Dear all,

I started to design a FET source follower circuit which I want to connect between my preamp and power stage circuit. I will most likely use a Constant Current Source between the source and ground.

Some characteristics:
- Signal swing: 25 Vp-p
- Offset voltage: 100 V DC
- Supply voltage: 300 - 500 V DC
- Bias current: 5 - 25 mA

Which characteristics should I keep in mind for best audio performance? Any recommendations?

Thanks in advance,
Jos
 
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