Aleph5 trouble

Has · 30th January 2007, 04:34 PM

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
thx

wuffwaff · 30th January 2007, 06:08 PM

Hi,

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

William

Has · 30th January 2007, 07:00 PM

no i have xlr connection so - and ground isn't connect.

30th January 2007, 04:34 PM	#1
Has diyAudio Member Join Date: Mar 2003 Location: Zagreb	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 thx

30th January 2007, 06:08 PM	#2
wuffwaff diyAudio Member Join Date: Aug 2001 Location: Ingolstadt Germany	Hi, do you still have the connection between -in and ground in both channels? This would change the gain by 6dB. William __________________ een ooievaar is geen konijn want zijn oren zijn te klein!

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30th January 2007, 07:00 PM	#3
Has diyAudio Member Join Date: Mar 2003 Location: Zagreb	no i have xlr connection so - and ground isn't connect.

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