Thank you sir.
I want to make B500 with balance input but only use 3 pair of final transisitor.
How much bias and max voltage for it??
Regards
i would like to remove the LDR, i dont need the limiter. whats the value of the resistor that i will use in place for the LDR? im planning to bridge this.
Bias
I want to make B500 with balance input but only use 3 pair of final transisitor.
How much bias and max voltage for it??
Regards
I want to make B500 with balance input but only use 3 pair of final transisitor.
How much bias and max voltage for it??
Regards
test voltage point?
Hello Sir Mile,
I have just finished to put components on my B500 board, right now I'm working with the protection circuit. i just want to ask about the key areas in the B500 schematic where I can test the voltage and the correct values that should be there?
I'm using a 10 Amperes, +/-50 volts AC and and in DC it's measuring on the multimeter around +/- 68 to 69 volts.
I'm using in R24 and R25: 2k2 2watts
Thank you in advance for the help that u can give.
regards,
mj777
Hello Sir Mile,
I have just finished to put components on my B500 board, right now I'm working with the protection circuit. i just want to ask about the key areas in the B500 schematic where I can test the voltage and the correct values that should be there?
I'm using a 10 Amperes, +/-50 volts AC and and in DC it's measuring on the multimeter around +/- 68 to 69 volts.
I'm using in R24 and R25: 2k2 2watts
Thank you in advance for the help that u can give.
regards,
mj777
power supply question
hey miles aka apexaudio, i want to use 40-0-40 transformer, how much ampere rating i should use for the transformer @ 2 ohms load and how much rms power it can deliver using this transfomer.
im expecting a rating 600w @ 2 ohms but not sure how much transformer amperes i should use. thanks
hey miles aka apexaudio, i want to use 40-0-40 transformer, how much ampere rating i should use for the transformer @ 2 ohms load and how much rms power it can deliver using this transfomer.
im expecting a rating 600w @ 2 ohms but not sure how much transformer amperes i should use. thanks
The usual and best advice for selecting a transformer for an audio power amp is that the VA should be between one times the maximum power rating and two times the maximum power rating.
For 600W of maximum output power, you can use a 600VA to 1200VA transformer.
The amplifier will work if the transformer is smaller than 600VA and it will also work if the transformer is over 1200VA. Buy what you can afford and do ask what the regulation is. The lower the regulation, the "better" the transformer. The voltage sags less when the amp is asked to deliver current to the load.
Yes i did while testing.
Input gnd connected to psu gnd.
output gnd connected to psu gnd.
thanks andrew, do i need to add a few more trannies in this circuit so that it can handle loads @ 2 ohms?
theres a reason for me wanting to do this, i want to bridge this amp so that it can drive two subs rated 500w @ 8 ohms each using 40-0-40 VAC trasfo. In theory, if this amp can handle 600w @ 2ohms, bridging the amp could provide (fingers crossed) 1200w @ 4 ohms.
I have transformer 10A secondary voltage 45-0-45 (VAC) or 63-0-63 (VDC).
How many pair of output?
Thankyou.
How many pair of output?
Thankyou.
viki,
copper side must be clean,use acetone or laquer thinner and please make continuity check copper side mostly transistor pinning make shure nothing is shorted better remove all those flux.
and better find mylar caps instead of ceramic 100nf 47nf 100v
copper side must be clean,use acetone or laquer thinner and please make continuity check copper side mostly transistor pinning make shure nothing is shorted better remove all those flux.
and better find mylar caps instead of ceramic 100nf 47nf 100v
I am using low power transformer , could that be the reason.
I have checked the tracks continuity, Its fine.
I have checked the tracks continuity, Its fine.