Hi, it's good to receive reply from you 🙂
When input is shorted locally the noise is the same Nelson (same buzz sound, same level).
When input is shorted locally the noise is the same Nelson (same buzz sound, same level).
When input is shorted locally the noise is the same Nelson (same buzz sound, same level).[/QUOTE]
This happen to me when i finally set my amp on the casing. before i arranged the wiring to make it looks good, but problem on hum and oscillation occurs so I have rewired the system the shortest wire possible and put a 68ohm resistors soldered directly on the bases of the output Mosfet.
This happen to me when i finally set my amp on the casing. before i arranged the wiring to make it looks good, but problem on hum and oscillation occurs so I have rewired the system the shortest wire possible and put a 68ohm resistors soldered directly on the bases of the output Mosfet.
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Amp casing is always real nightmare for me. If I do not succeed in reducing the noise I will experiment putting the amp in a wood or plastic case this time.
What did you use as output Mosfet?
What did you use as output Mosfet?
My amp is not oscillating one problem at a time is enough for me. It's just buzzzzzing softly but buzzzzzzzing with imput connected to a source. Input locally shorted made no change in the situation.
Then I think that either your grounding arrangement is
defective or the power supply rejection is not good.
For the latter, try using a larger capacitor on the RC
filter than supplies bias to the differential input pair of
transistors and see if that makes a difference.
😎
defective or the power supply rejection is not good.
For the latter, try using a larger capacitor on the RC
filter than supplies bias to the differential input pair of
transistors and see if that makes a difference.
😎
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