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Old 30th January 2007, 05:34 PM   #1
Has is offline Has  Croatia
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Join Date: Mar 2003
Location: Zagreb
Default Aleph5 trouble

Few days ago i measured Amp currents an voltages and i make short connection betwen Drain of one dif trans and 221 Ohm (Kristijan's R16). Now one channel is quiter than other. When i put sin ton one channel is400mV(normal) and other 200mV(bad). I try to change input pair tranz but the problem stay, thing that problem is't here. All 1Ohm resistors have across them 0.6V. On Q3 is 3.8V at drain, at R14 is 4.75V. It look like only 3 tranz is working. Output voltage is half from channel which is correct. Offset is cca 80mV. Is someone have some idea what could be wrong? All other marks for tranz and rasistors is from pass service
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Old 30th January 2007, 07:08 PM   #2
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Join Date: Aug 2001
Location: Ingolstadt Germany

do you still have the connection between -in and ground in both channels? This would change the gain by 6dB.

een ooievaar is geen konijn want zijn oren zijn te klein!
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Old 30th January 2007, 08:00 PM   #3
Has is offline Has  Croatia
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no i have xlr connection so - and ground isn't connect.
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