I want to build an amplifier from spare parts, and built one exactly like this one:
my speaker is a bose 273488004, the transistor is d2375, resistor is 2.7k, since it's the closest i have. i'm using 6x1.5V batteries in series, so 9V total.
now, the problem is, i do not understand the input. i want to use a mono jack for a guitar, it has a positive lead, and a ground. when i connected both input wires to each of the jack lugs, no signal came from the guitar. when i connected a headphone jack (1 green 1 blue and 1 red to the input leading to the capacitor, and the ground to the input leading to ground), nothing happened, no sound was comming from my phone.
Then, i connected the blue and green to bottom input wire, the red to the top - and ti can hear Jimi playing, it works. BUT. i have a spare ground wire, from the headphone jack, no idea where it connects. if i connect the mono guitar jack input, and connect both the input wires to the positive lead, since it's mono, what do i do with the ground? i also noticed the transistor is very hot, is this normal?
Second problem, i'm using batteries. i have no ground. i'm using the negative side of the first battery as the ground. not sure if this is a problem. I'm only experience in guitar wiring electronics, so sorry for a general lack of knowledge, but it's really hard to find answers to such questions online.
All input is appreciated, thanks.
my speaker is a bose 273488004, the transistor is d2375, resistor is 2.7k, since it's the closest i have. i'm using 6x1.5V batteries in series, so 9V total.
now, the problem is, i do not understand the input. i want to use a mono jack for a guitar, it has a positive lead, and a ground. when i connected both input wires to each of the jack lugs, no signal came from the guitar. when i connected a headphone jack (1 green 1 blue and 1 red to the input leading to the capacitor, and the ground to the input leading to ground), nothing happened, no sound was comming from my phone.
Then, i connected the blue and green to bottom input wire, the red to the top - and ti can hear Jimi playing, it works. BUT. i have a spare ground wire, from the headphone jack, no idea where it connects. if i connect the mono guitar jack input, and connect both the input wires to the positive lead, since it's mono, what do i do with the ground? i also noticed the transistor is very hot, is this normal?
Second problem, i'm using batteries. i have no ground. i'm using the negative side of the first battery as the ground. not sure if this is a problem. I'm only experience in guitar wiring electronics, so sorry for a general lack of knowledge, but it's really hard to find answers to such questions online.
All input is appreciated, thanks.