I built a whammy a while ago and it worked fine and sounded great. A few days ago I lost one side of the headphones - one side blown due to about 16v dc!
Any ideas?
Any ideas?
Many reasons,do not use any amplifier without d.c protection in the future.
You have learned the lesson hard way 😞
You have learned the lesson hard way 😞
Can start with making sure output transistors
are good.
One fails pretty common to have almost one full rail
on ouput.
Otherwise aside from common things like bad solder joints
or open bias pots.
Assuming it is straight forward 2 stage amplifier with differential.
differential maintains balance dc offset.
so if one transistor goes bad / bad solder
etc etc.
DC balance goes.
More likely culprits are current sources
for differential input or second gain stage.
Those transistors remain more on the hotter side.
So check connections or actual semi conductors for failure.
Other than that another million guesses. Or associated passive componets
that maintain those current sources.
Run a simple beap beap diode check on output transistors.
Then current sources.
And any basic visual for open/ cold solder joints.
Course not familiar with circuit so
quick look or post of circuit schematic
are good.
One fails pretty common to have almost one full rail
on ouput.
Otherwise aside from common things like bad solder joints
or open bias pots.
Assuming it is straight forward 2 stage amplifier with differential.
differential maintains balance dc offset.
so if one transistor goes bad / bad solder
etc etc.
DC balance goes.
More likely culprits are current sources
for differential input or second gain stage.
Those transistors remain more on the hotter side.
So check connections or actual semi conductors for failure.
Other than that another million guesses. Or associated passive componets
that maintain those current sources.
Run a simple beap beap diode check on output transistors.
Then current sources.
And any basic visual for open/ cold solder joints.
Course not familiar with circuit so
quick look or post of circuit schematic
Unfortunately you will have to test everything yourself.
Look at post#4,I see a good start here.
Start from the outputs power transistors.
Desolder and measure.
I hope that you have the education to test with an ohmmeter (diode test), otherwise look at some videos in YouTube.
Good luck! 🍀Just an example here
Look at post#4,I see a good start here.
Start from the outputs power transistors.
Desolder and measure.
I hope that you have the education to test with an ohmmeter (diode test), otherwise look at some videos in YouTube.
Good luck! 🍀Just an example here