CJ Well-known member GDIY Supporter Joined Jun 3, 2004 Messages 15,987 Location California Today at 4:35 PM #1 anybody know the purpose of the LED on Q3 and Q4? Compression maybe? Thanks! Attachments led.png 206.6 KB
JohnRoberts Well-known member Staff member GDIY Supporter Moderator Joined Nov 30, 2006 Messages 29,619 Location Hickory, MS Today at 4:47 PM #2 It looks like a voltage clamp (approx 2V) to prevent Q3 from saturating (for faster recovery after transients) "and/or" to limit peak base drive voltage seen at Q9..... or not. JR
It looks like a voltage clamp (approx 2V) to prevent Q3 from saturating (for faster recovery after transients) "and/or" to limit peak base drive voltage seen at Q9..... or not. JR