Hi there!
Well, I finally got one channel up and running on my Leach Amp, and I did all my testing at the workbench. So I decided to take her out for a ride and hooked the darn thing on to my Yamaha DSP A2, that would do as a pre-amp.
It started out really well and it sounded great!
BUT
In my joy, having her up and running, I got a bit trigger happy and powercycled the amp, and this is where my troubles start. (I cycled it really quick. The amp was off for only one second or so)
All by a sudden, there was this really squealing noise from the loudspeaker and after a second, the fuse blew. When I replaced the fuse and turned on the amp again, C22 blew up (and there was this smell, you know)...
http://users.ece.gatech.edu/~mleach/lowtim/graphics/ckt.pdf
I tried and replaced the transistor Q17, but I blew another set of fuses.
Where should I start looking for errors/broken stuff?
How do I see that a transistor is broken?
Which transistors/diodes/caps are most likely to be broken?
As I mentioned before, the amp worked and sounded really good until I powercycled.
Hmmmm... I'll try and change q12, q13, q14 and q15.
Any ideas?
Have a good one,
//magnus
Well, I finally got one channel up and running on my Leach Amp, and I did all my testing at the workbench. So I decided to take her out for a ride and hooked the darn thing on to my Yamaha DSP A2, that would do as a pre-amp.
It started out really well and it sounded great!
BUT
In my joy, having her up and running, I got a bit trigger happy and powercycled the amp, and this is where my troubles start. (I cycled it really quick. The amp was off for only one second or so)
All by a sudden, there was this really squealing noise from the loudspeaker and after a second, the fuse blew. When I replaced the fuse and turned on the amp again, C22 blew up (and there was this smell, you know)...
http://users.ece.gatech.edu/~mleach/lowtim/graphics/ckt.pdf
I tried and replaced the transistor Q17, but I blew another set of fuses.
Where should I start looking for errors/broken stuff?
How do I see that a transistor is broken?
Which transistors/diodes/caps are most likely to be broken?
As I mentioned before, the amp worked and sounded really good until I powercycled.
Hmmmm... I'll try and change q12, q13, q14 and q15.
Any ideas?
Have a good one,
//magnus