Need help! Pcb layout, schematic diagram for audio power amplifier

[bluegirl]

Uses 4 transistors with the same values, class AB, Vcc between 12-25 volts, load impedance eider 4 or 8, result sana ay 30 watts... Sana may ma recomend po kayong transistor at sana available po sa stores

[beginner wan]

http://www.electronicslab.ph/forum/index.php?topic=6895.msg115867;topicseen#msg115867
 

[marcelino]

Uses 4 transistors with the same values, class AB, Vcc between 12-25 volts, load impedance eider 4 or 8, result sana ay 30 watts... Sana may ma recomend po kayong transistor at sana available po sa stores

avoid multiple thread.
This topic should be on PCB section.

Oh please, post the schematic.

[bluegirl]

avoid multiple thread.
This topic should be on PCB section.

Oh please, post the schematic.

sensya na po. Urgent lng tlga. Wla pa din po aq schematic eh

[maldihtah13]

sensya na po. Urgent lng tlga. Wla pa din po aq schematic eh

paano gagawin yung pcb kung walang diagram?

[danny]

paano gagawin yung pcb kung walang diagram?

masyado nang paulit ulit ang post nito
tapos sa ibang post kulang kulang ang specs.
it seems na talgang wala siyang diagram or nde pa
nakaka design, its not easy to design an amp
in a snap together with the pcb.
sana nasimulan na niya ito noon pa
para nde ganitong nag mamadali.

[bluegirl]

paano gagawin yung pcb kung walang diagram?

paano gagawin yung pcb kung walang diagram?

yun nga prob eh kami pa ang pinapahanap ng sir namin ng diagram. Sa intrnet naman wla masyado aq makita samples na 4 yung transistor. Tapos individual pah...

[bluegirl]

Pasenxa na po. Last wik lng kasi sinabi eh pati specs na binigay yun lng tlga...

[marcelino]

http://sound.westhost.com/project27.htm

replace mo nalang ang preamp.

[marcelino]

nga pala, have you googled this thing?

eto pa: http://www.ee.washington.edu/circuit_archive/circuits/km241.html

[bluegirl]

http://sound.westhost.com/project27.htm

replace mo nalang ang preamp.

4 transistors ba ang gamit dun? mas madali ata ung guitar power amplifier kaysa na una na pre amp

[bluegirl]

nga pala, have you googled this thing?

eto pa: http://www.ee.washington.edu/circuit_archive/circuits/km241.html

panu po maging readable yung ps file galing sa syt na binigay mo? .ps file po xa

[marcelino]

4 transistors ba ang gamit dun? mas madali ata ung guitar power amplifier kaysa na una na pre amp

actually 6 nga na ang ginamit. dalawang drivers at 2 pairs na output transistors.

BD139 and BD134 are the drivers for transistors TIP36c and TIP35c. Tigdadalawang TIP36 and TIP35 to double the power produced. pero pwedeng tig-iisa lang. it shall provide half of power.

[marcelino]

panu po maging readable yung ps file galing sa syt na binigay mo? .ps file po xa

PS can be opened by adobe distiller. It shall result to PDF.

eto, i manage to extract it.

http://depositfiles.com/files/7dguqgy4x

[bluegirl]

actually 6 nga na ang ginamit. dalawang drivers at 2 pairs na output transistors.

BD139 and BD134 are the drivers for transistors TIP36c and TIP35c. Tigdadalawang TIP36 and TIP35 to double the power produced. pero pwedeng tig-iisa lang. it shall provide half of power.

ah.. pwede 4 transistors ang gamitin q dun with the same values ng transistor? yun kasi sabi ng prof. q eh

[bluegirl]

PS can be opened by adobe distiller. It shall result to PDF.

eto, i manage to extract it.

http://depositfiles.com/files/7dguqgy4x

dami pong transistor.. sana may iba po kayo maibigay na schematic na 4-6 transistors lang po

[marcelino]

dami pong transistor.. sana may iba po kayo maibigay na schematic na 4-6 transistors lang po

honestly, i am not good with amplifiers. especially with these discrete types. pero, theoretically, i think you need several stages to amplification.

di lang yan isang level, at amplified na kaagad. Even if you look deep into the internals of those IC audio amplifiers.

Can you provide a more specific requirements?
Sige, i'll try to help.

[danny]

well ang mabuti pa
booster na ang ang gawin mo.
iyon patok yun pwede apat na transitor doon same value
siguro naman, iyan ang hinahanap ng prof mo hehhe
12V din supply, may transformer nga lang.
what do u think?

[Woots29]

tama si sir danny booster na lang
kasi un lang talaga ang desgn na alam ko na pwedeng 2 o apat ang transistor
wel according to ur specs swak un
yhadz class AB diba?  un na un booster hehe 

[marcelino]

yan din ang duda ko kaya sya nadadamihan sa transistors... hehehe