Seems to me, that bc557 Vbe 557 mV is correct.
32V on the 547 indicate either reverse voltage or the transistor is blown. There can´t be 32V on a be.
32V on the 547 indicate either reverse voltage or the transistor is blown. There can´t be 32V on a be.
3 times check all transistors it dont show short on them. i will change 547 first and test it again
ty soo much.
ty i will check stock again but i dont think i have them too. the problem is wekend and if i order too it dont come untill monday. so i was thinking to use 5551 and 5401 for that.
Here is the PDF Still4given posted with voltages (based on +/-32vDC thought, so factor accordingly). Very helpful.
Attachments
2n5551 is different pinout than BC547. BC550, BC546 would work for testing.
Here is a chart to give some ideas for substitutions.
Small Signal Transistors
Here is a chart to give some ideas for substitutions.
Small Signal Transistors
WARNING: Still under development, double check data and please let me know of any errors...just saw one
BC559 (PNP)& BC549 (NPN).....in the wrong row
OK, some brief words re SQ in my system, bearing in mind this is an active 3-way with the AX14 powering the mid-range panel from 450hz to 4500hz.
I find the amp very neutral, adding nothing I can perceive to the sound. Great dynamics, detail and imaging. Very happy with its performance in my system with no thought to returning to the previous mid-range amp which is also a strong performer. Also very well behaved with no turn on or off thump.
Cheers
hello, does it have something or affects the polarity of the capacitors at the input and output
That was from post #4626 BTW.
I don't understand your question. Can you word it a different way?
Per schematic those are reversed. That is how the layout shows them and they seem to work fine like that. It is an AC output so I'm not sure how that is affected. Maybe someone more knowledgeable than me can answer that.
I collected and listened to the so-called APEX AX-20,
about which I want to share here. In fact, this is a classic amplifier
with all the improvements from Douglas Self’s textbook (and recommendations from local colleagues).
Compared to Apex AX-14, this amplifier sounds much more adult:
More dynamic sound, excellent control of 4 pieces 8 "bass. Bass is excellent.
Clear low. In the 14th, in comparison, a little tightened, just a little because of what
it seems that it’s even a little more.
who whant to do (gerbers) Apex_AX_20
about which I want to share here. In fact, this is a classic amplifier
with all the improvements from Douglas Self’s textbook (and recommendations from local colleagues).
Compared to Apex AX-14, this amplifier sounds much more adult:
More dynamic sound, excellent control of 4 pieces 8 "bass. Bass is excellent.
Clear low. In the 14th, in comparison, a little tightened, just a little because of what
it seems that it’s even a little more.
who whant to do (gerbers) Apex_AX_20
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hi i want to use this protect on ax14. but ax14 dont have protection out.
so i try to take it from b500 schematic but i am not good on it and need to some one check it please
the resistor values and capasitor is right? and if i make mistake pls tell me where. thank you
