Scott A 426

Well spotted. Yes it does look wrong even given the unconventional Vbe multiplier. To many 'diode drops' to overcome (four including the Vbe generator). The top half of the output stage wouldn't be current limited.
 
SCOTT A426

Dear friends,

I was busy, I couldn't share. a nice experience to you; BD243C is good for output. I used BC140 & 141 in the driver transistor part. It works well, the transmitter resistance should be updated with 0.25 ohm resistance.

Good luck
 
Dear friends,

I was busy, I couldn't share. a nice experience to you; BD243C is good for output. I used BC140 & 141 in the driver transistor part. It works well, the transmitter resistance should be updated with 0.25 ohm resistance.

Good luck