power amplifier DB audio

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power amplifier DB audio

Post by triac on Thu Oct 05, 2017 10:02 am

Good Day Mga Sis,

Please help me with my power amplifier.When i turn the volume up,output transistor always gets busted,including transistor 2n5551 and resistors.Fuses are okay.May problema po ba ang power supply at ang pre-amp?Thank you all. Question

Things that i did:

i replace all the resistor,transistor na 2n5551,output transsitor.When i turn the volume up sunog na naman ang resistor at sira na rin yung output transistor.Kung 1/4 lang volume ko di naman masisira yung unit.  Question
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Re: power amplifier DB audio

Post by ultrasonic™ on Sat Oct 07, 2017 12:27 am

pwede siguro sis sira ang spkr.. na try mo na e check baka sobrang mabigat na ang reading (very low resistance almost short).. or minsan naman sumasayad na voice coil... 

or else out bias iyan.. kaya nasusunog

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Re: power amplifier DB audio

Post by triac on Sat Oct 07, 2017 11:22 am

sis ultrasonic okay naman po yung speaker..tama ang resistance niya at hindi rin sumasayad ang voice coil niya..check ko po yung biasing na sinasabi mo..thank sa info sir..
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Re: power amplifier DB audio

Post by danny on Fri Oct 13, 2017 2:25 pm

ilan ang idling current /bias current mo?
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