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hardman cardon AVR20II
hardman cardon AVR20II
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Old 9th January 2009, 07:41 AM   #1
east electronics is offline east electronics  Greece
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Join Date: Jan 2006
Location: Athens GREECE
Default hardman cardon AVR20II

ok .....
case :hardman cardon AVR20II
symptom : having a baby ...... at home .... resulting half a glass of coke inside the amp while operating ( !!!!!!! )

only outs , drivers , a few resistors and a few caps .... nothing that can not be faced in any normal lab

though A1859A and C4883A drivers do not exist in the greek market so i replaced them with mje 15033-32 and the extreme semiconductor 2sc 4137 was repalced with a bd 135 .....

finally a resistor network of 10 R and 442 R that was responsible for seting the bias was replaced with a 390R resistor and 100R multiturn .....to be able to set the bias propely

amp is working just fine any comments ???

thank you
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