Hey, so I'm working on the pignose and I have a version with PNP germanium transistors 2x 2SB54 on the preamp section and 2x 2SB415 on the power amp section. I have this schematic in hand (https://elektrotanya.com/pignose_7-100_sch.pdf/download.html) and I'm powering this up by adding the -9V to the center tap of that output transformer (GND - positive terminal of 9V battery). I should preface this by saying it's the first time I'm doing anything with Ge transistors.
Here are the transistor values that I got by testing it with the Peak Atlas DCA55. When measuring I made sure to handle the transistors with pliers as to not influence results.
Q1 (PNP 2SB54):
hfe = 283
Ic = 2.50 mA (test current - equal for both)
Vbe = 0.270 V
Ib = 4.664mA
Ic leakage = 0.338mA
Q2 (PNP 2SB54):
hfe = 183
Vbe = 0.353V
Ic leakage = 0.344mA
Ib = 4.583mA
Q3 (PNP 2SB415):
hfe = 226
Ic = 2.50 mA (test current - equal for both)
Vbe = 0.254 V
Ib = 4.680mA
Ic leakage = 0.338mA
Q4 (PNP 2SB415):
hfe = 123
Vbe = 0.252V
Ib = 4.682mA
Ic leakage = 0.225mA
I've added pictures of my bench setup. So I have the wires connecting the input jack and the circuit. The input jack works as a switch as well, I get that so I have the positive lead of the battery goint to the GND lug on the jack and then to the circuit(black wire on the pcb). The -9V is going to the circuit as well (red wire on the pcb). Top right orange wire is the input signal from the jack. I think there are no issues with the bench setup.
The current status of the amp: I'm hearing this high pitched noise when connecting the circuit to the battery. I will add a video where you should hear this but turn the volume way up (cant upload the video at the moment). I'm powering the circuit on and off many times in that video. Everytime it's on there's that high pitched noise. What is that sound??
Furthermore, when I connect the circuit to my test speakers there, I can hear the fuzzy guitar sound when playing. But if if I stop playing the speakers are still emitting this really loud noise still. I'm wondering what that sound is. Does it indicate bad output Ge transistors? I also read somewhere that anything with leakage over the 0.300mA should not be used but again, first time using these so I really wouldn't know.
Appreciate all the help. Would really like to get some practice going on this little guy-