APEX PA Amp Turn on off mute - need design support against obsolet devices

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NMOS

NMOS

Member
Joined 2010
Helllo here is APEX schematic turn on/off mute

with

PN4391
2n5638

Problem is....this JFET chopper devices has last shipment,
not recommended for new designs

I have not study electronic engineer and need help....

is it possibile to modify circuit with easy to get devices like bjt or mosfets
 

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