900W H-class PA Amp with Limiter

[DJ_DUMY]

apex please give us scheme to this PCB, thanks

 

[apexaudio]

Protect

APEX PA Protect Schematic

 

[electra_ina]

Apex...two questions:
1. Protector kit: TR BD241 or TIP31 is placed in heatshink TR final. Is right?
2. Step up driver, can I used dioda RHRP3060 instead MUR1620??

Regards,

 

[engel dela pena]

For first powered amp just do not connect 30V on soft-start circuit.

apex,
150R same arrangement as 330R of soft start when powering up?
for speaker test,100uf if no protect ckt?

 

[gooseneck]

Qsc1300

Does any diy'er homebrew the QSC 1300 schematic? anybody please share it with me..

 

[apexaudio]

Apex...two questions:
1. Protector kit: TR BD241 or TIP31 is placed in heatshink TR final. Is right?
2. Step up driver, can I used dioda RHRP3060 instead MUR1620??

Regards,

Yes TIP31 is placed on main heatsink
RHRP3060 can be used instead SFA1603, MUR1620 is dual diode.
Regards

 

[apexaudio]

apex,
150R same arrangement as 330R of soft start when powering up?
for speaker test,100uf if no protect ckt?

Yes, 150R is same as two 330R in paralel, 100uF in series with speakers just for listening test for first powered.

 

[electra_ina]

Thanks Apex...its clear..
One again..please give me schematic softstart for PSU. I see another thread layout PCB and I don't see schematic.
Regards

 

[apexaudio]

Thanks Apex...its clear..
One again..please give me schematic softstart for PSU. I see another thread layout PCB and I don't see schematic.
Regards

You can see soft-start schematic in post #424, use +/-15v (30V) without gnd from protect post #422, and gnd from protect board connect to gnd of PSU board.

 

[dexter2003]

A smps would work perfect on this amplifier , does anybody know how to design one ?

 

[wg_ski]

Designing/building an SMPS suitable for this amp is harder than the amp itself.
Let's see here.... +/-110V, capable of 12 amps long term average and 100 amp repetitive bursts (2 channels, 2 ohms). That's not something you can whip together in a weekend (or even a month), nor is it something you're likely to get for free.

 

[apexaudio]

Designing/building an SMPS suitable for this amp is harder than the amp itself.
Let's see here.... +/-110V, capable of 12 amps long term average and 100 amp repetitive bursts (2 channels, 2 ohms). That's not something you can whip together in a weekend (or even a month), nor is it something you're likely to get for free.

You have right

 

[andrewlebon]

hi apexaudio
greetings have finally managed to get nsl 32
dc voltages are positive 70 positive 90 0 negative70 negative 90 is it
ok to test amplifier only want to test atlow volume

thanking you
andrew lebon
all voltages from single torriod

 

[apexaudio]

hi apexaudio
greetings have finally managed to get nsl 32
dc voltages are positive 70 positive 90 0 negative70 negative 90 is it
ok to test amplifier only want to test atlow volume

thanking you
andrew lebon
all voltages from single torriod

Ok , for test at any volume, is DC voltage 0,+/-70V,+/-90V?

 

[DJ_DUMY]

new PCB vesiune designed for active subwofer
I'll make a test PCB next week, if we think changes should be made I expect corrections

 

[Gitsa]

And for the forum your circuit board is available?

 

[gooseneck]

Thanks.

Rey

what is the main function of NSL32 LDR, if i remove it coz we cannot find it in any electronic store, does the amp will work fine also?

 

[gooseneck]

hello my friends out there, right now left channel of my Konzert K10 is smoking and when i open it found out the are base series resistor of 3.3 ohms, 2watts are open and 4 2SA1943 and 5 2SC5200 is damage...and right now im looking for any who could send me a schematic or service manual of Konzert K10 series.... again thanks to audio machines who send me the service manual of Phonic MAR6... pardz regards dyan kung may service manual ka ng K10 please lang paki send mo naman sa akin....thanks to all of you...

 

[engel dela pena]

Does any diy'er homebrew the QSC 1300 schematic? anybody please share it with me..

qsc1300
http://www.qscaudio.com/support/library/schems/Discontinued/USA Series/usa1300.pdf

 

[apexaudio]

what is the main function of NSL32 LDR, if i remove it coz we cannot find it in any electronic store, does the amp will work fine also?

Amp will work fine without NSL32, but then there no clip limiter. You can use some sound procesor with limiter.
Regards