Hi everyone how you all fine !!
please i need help about my diy 2sc500 amplifier
few days ago i found a site where some stuff was available about 400watt mono amp, i downloaded that material nd start making it, i made pcb nd buy all the components required for this amp nd finally completed whole circuit
Tomorrow when i connect the transformer to the circuit (55-0-55)ac 12amp and +/-76 volt dc , after few second rectifyng diode became hot nd the wire connect to the transformer to rectifier became red nd broken .
i review all the copper tracks for miscontact but didnot found such an error. i desolder all the transistor including a1015,c2229,2sc5200,tip42 nd check with dmm the result is positive
i solder all transistor except power transistor i.e 2sc5200
and started testing the circuit with bulb testing method(connecting 220v bulb in series with primary of transformer)
when i power up the transformer the bulb did not glow (REMEMBER THERE IS NO POWER TRANSISTOR IN CIRCUIT)
now i solder all the negative cycle power transistor i.e power transistor driven by b688 , the bulb glow slighty that is the good sign
now after soldering all negitive pwr transistor i solder only one positive cycle pwr transistor i.e driven by d718 and the bulb glow extreme brightly
i desolder that transistor nd connect another transistor in place of it the result remain same
iam unable to daignose the problem in positive cycle section of circuit , the i tested the pwr transistor which i connect to the positive cycle section by dmm , the result which came is positive
(sorry for my bad english)
please i need help about my diy 2sc500 amplifier
few days ago i found a site where some stuff was available about 400watt mono amp, i downloaded that material nd start making it, i made pcb nd buy all the components required for this amp nd finally completed whole circuit
Tomorrow when i connect the transformer to the circuit (55-0-55)ac 12amp and +/-76 volt dc , after few second rectifyng diode became hot nd the wire connect to the transformer to rectifier became red nd broken .
i review all the copper tracks for miscontact but didnot found such an error. i desolder all the transistor including a1015,c2229,2sc5200,tip42 nd check with dmm the result is positive
i solder all transistor except power transistor i.e 2sc5200
and started testing the circuit with bulb testing method(connecting 220v bulb in series with primary of transformer)
when i power up the transformer the bulb did not glow (REMEMBER THERE IS NO POWER TRANSISTOR IN CIRCUIT)
now i solder all the negative cycle power transistor i.e power transistor driven by b688 , the bulb glow slighty that is the good sign
now after soldering all negitive pwr transistor i solder only one positive cycle pwr transistor i.e driven by d718 and the bulb glow extreme brightly
i desolder that transistor nd connect another transistor in place of it the result remain same
iam unable to daignose the problem in positive cycle section of circuit , the i tested the pwr transistor which i connect to the positive cycle section by dmm , the result which came is positive
(sorry for my bad english)