APEX Hey I'm interested in seeing B500 f 32 NSL have any trouble getting replacements from what we could t
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Hello I am interested in Mount B500 essibiboi but here it is difficult to achieve in the regular LED NSL32 module if you are using does not affect the performance of power....
apex...
sir...
today i replaced op amp NE5532 with new one and zeners too...
i've checked 2n5401 2n5551 mje340 mje350 c4793 and a1837 they were all fine...
dc is still present at the output...
still power turn themselves hot in less than a minute...
Hi Apex,
Is it possible to change R23 (330 ohms) to a variable resitor like 500 ohms to adjust bias and crossover voltage?
Regards,
Joel
Is it possible to change R23 (330 ohms) to a variable resitor like 500 ohms to adjust bias and crossover voltage?
Regards,
Joel
You need to put tin on your lines! Maybe you have problem with conductance!
Also measure transistors to see are they all ok.
Then look at your power supply cables too.
Measure bias.
Also measure transistors to see are they all ok.
Then look at your power supply cables too.
Measure bias.
Hi, Hadita.
I haven't put anything instead of NSL32, and it works fine.
You don't need NSL32 for amplifier to work.
Regards
I haven't put anything instead of NSL32, and it works fine.
You don't need NSL32 for amplifier to work.
Regards
Dc output
@ Ees,
Hi friend, you may need to test your module with a lower voltage and current, not the 25A. Getting hot output trannies usually indicates high bias current. Something should be wrong in the circuit.
Have you matched those outputs? Though not always a big deal, but it always helps maintain a well balanced transistor function.
@ Ees,
Hi friend, you may need to test your module with a lower voltage and current, not the 25A. Getting hot output trannies usually indicates high bias current. Something should be wrong in the circuit.
Have you matched those outputs? Though not always a big deal, but it always helps maintain a well balanced transistor function.
Nsl32
It's true,
NSL 32: this device together with its related parts will prevent your amp from clipping or overdriven beyond its capability.
It decreases input impedance allowing small amount of signal going into the 1st stage OP Amp, when the circuit senses an over current / voltage at the output / speaker terminal.
It's true,
NSL 32: this device together with its related parts will prevent your amp from clipping or overdriven beyond its capability.
It decreases input impedance allowing small amount of signal going into the 1st stage OP Amp, when the circuit senses an over current / voltage at the output / speaker terminal.
Usually DC offset on output is 4-8mV in my expirience without any matching and adjust, and it is stable (bias, temperature) with or without speakers on output.
Regards
Do you measure other DC voltage points? Outputs must be cold without bias.
Regards
@ Ees,
do you have a clearer pics so we can clearly see resistors' colors and capacitors' orientation?
I use IC sockets for LM555 experiments, but not with the preamps (OP Amp) of my amps for more secured connection.
Good Luck,
Joel
do you have a clearer pics so we can clearly see resistors' colors and capacitors' orientation?
I use IC sockets for LM555 experiments, but not with the preamps (OP Amp) of my amps for more secured connection.
Good Luck,
Joel
Can you zoom this area, I can't see clear, but I think you have mistake on your PCB.
Regards
Attachments
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@ Tube pros & maihalo, thanks to information but if it happens clips how to influence or power of damaged speakers
regard
@ Tubepro and maihalo, on the basis of the information, but if this happens the clip to the speakers or as a result of damage to the power
CLipping
Hi hadita,
you'll notice sound distortion when your amp is clipping or overdriven.
decreasing your sound level input or the volume control, will fix the problem.
Regards,
Joel
Hi hadita,
you'll notice sound distortion when your amp is clipping or overdriven.
decreasing your sound level input or the volume control, will fix the problem.
Regards,
Joel
On your PCB emiter 2SA1837 is connect to colector 2SA1943...😕 Your 2SA1837 is on wrong position, you must move it 2,5mm, and then emiter 2SA1837 will be connect to base 2SA1943,
Regards
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