hello
i got this amp recently. it was sat in my car overnight and got cold and possibly damp (could that be it?)
either way when i turn it on, initally it had a loud pop which i imagine from what i have read, is a large inrush current. the pop only seemed to happen when i switched it on. however in the video i have uploaded you do not hear the pop either of the times i switch on the amp. there is however a loud hiss. i am not too sure what this could be. i heard that removing the speaker and measuring with mV meter you get a certain reading. i tried that and got a mess of reading, all over the place, nothing solid. not sure what reading i should expect. i measured the resistance of the speaker and got 5.7 ohms. not sure what that reading should be but i thought its a bit of info.
any ideas or advice.
thanks
simon
EDIT: i have uploaded two pics of a dodgy looking cap, 330uF 200v, white stuff which i thought was thermal paste and a dark brown goo on the bottom where it was soldered on. i mesured the resistance of the cap and got 2M ohm connected either way round, using the beeper on my meter i got a tone for about two seconds then it stops, change leads around i get a tone again and then it stops. is this because the cap is charging to some extent and going from closed to open?
i got this amp recently. it was sat in my car overnight and got cold and possibly damp (could that be it?)
either way when i turn it on, initally it had a loud pop which i imagine from what i have read, is a large inrush current. the pop only seemed to happen when i switched it on. however in the video i have uploaded you do not hear the pop either of the times i switch on the amp. there is however a loud hiss. i am not too sure what this could be. i heard that removing the speaker and measuring with mV meter you get a certain reading. i tried that and got a mess of reading, all over the place, nothing solid. not sure what reading i should expect. i measured the resistance of the speaker and got 5.7 ohms. not sure what that reading should be but i thought its a bit of info.
any ideas or advice.
thanks
simon
EDIT: i have uploaded two pics of a dodgy looking cap, 330uF 200v, white stuff which i thought was thermal paste and a dark brown goo on the bottom where it was soldered on. i mesured the resistance of the cap and got 2M ohm connected either way round, using the beeper on my meter i got a tone for about two seconds then it stops, change leads around i get a tone again and then it stops. is this because the cap is charging to some extent and going from closed to open?
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