pinkspider 發表於 2014-5-14 11:00 static/image/common/back.gif
最後發現係乜引致大細聲呢??
i guess:
forte audio Class-A power amp...model 1a ?
, 每邊五對功率管 ...2SA1302/2SC3281 ?
power-on, 一邊大聲一邊細聲, check the current on both channels...differences ?
at細聲邊, sense the body temperature on each 功率管, ...cool/hot ?
check the bias across the emitter resistors...open circuit ?
damaged resistors found ? {:1_253:}
係 non-biased 功率管 (ie. not class-A working) 引致大細聲 ! billymud 發表於 2014-5-16 03:32
i guess:
forte audio Class-A power amp...model 1a ?
, 每邊五對功率管 ...2SA1302/2SC3281 ?
billy sir
是model 3,不過開一陣就好鬼熱@_@ zoneaudio 發表於 2014-5-17 21:05 static/image/common/back.gif
billy sir
是model 3,不過開一陣就好鬼熱@_@
一陣就好鬼熱@_@.....
{:6_193:} {:6_193:} Zoneaudio兄 想你幫幫手 請收pm{:1_332:}
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