With TR1 base and collector shorted, TR1 becomes a diode with cathode connected to C3, an AC ground.
TR2 now has less than 6DB of gain (amplification factor <2) to the output. 10mV in: maybe 17mV out with an impedance of ~8K, and that's without the TR2 "diode" shorting the signal to an AC ground.
Maybe the second circuit is copied exactly, short and all?
What do the spice simulations say?
There sure is a lot of response to this $2.00 problem.
For a quick check I ran a DC test on your amplifier using a 12 volt supply. I used 2N2222A transistors so things will be a little different. The numbers in pink boxes are the DC voltage.
The AC frequency response shows that it has an “audio” frequency response.
Uh what a complication ok...
remove R9
remove R4
remove C6 then in this place put resistor with 470k
remove R7
change R5 to 680 ohms
change C3 to 47 uF
change R1 to 2k2
use voltage 6 to 12 volts max 15Volts
Hai, L.chung,
I was requesting you to try to change the feed back line to Q1 Emitter (as per your diagram)and try, last week in the original schematic. any comments Please.
Hai, L.chung,
I was requesting you to try to change the feed back line to Q1 Emitter (as per your diagram)and try, last week in the original schematic. any comments Please.
Sorry, Sir. It was regarding a post of and aimed for Ronsimpson. He tried simulation but he connected the feed back to Q2 as per his diagram while it was to be connected to Q1.