APEX PA Amp Turn on off mute - need design support against obsolet devices - diyAudio
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Old 26th August 2011, 04:01 PM   #1
NMOS is offline NMOS  Germany
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Default APEX PA Amp Turn on off mute - need design support against obsolet devices

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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