caramoan tour package

caramoan tour package

« previous next »
Pages: [1] 2   Go Down

Author Topic: 250 watt amplifier  (Read 1362 times)

Offline jhon1977

  • Size C Battery
  • *****
  • Posts: 143
  • Pogi/Ganda Points: 5
250 watt amplifier
« on: November 12, 2011, 05:46:59 PM »

Logged

Philippine Electronics Forum

250 watt amplifier
« on: November 12, 2011, 05:46:59 PM »

Offline Disabled

  • Solar Power Satellite
  • *****
  • Posts: 5252
  • Pogi/Ganda Points: 316
Re: 250 watt amplifier
« Reply #1 on: November 12, 2011, 05:54:35 PM »
floating ata ung input ground ;D
may diagram po bah to?
tambay..
Logged

Philippine Electronics Forum

Re: 250 watt amplifier
« Reply #1 on: November 12, 2011, 05:54:35 PM »

Offline jhon1977

  • Size C Battery
  • *****
  • Posts: 143
  • Pogi/Ganda Points: 5
Re: 250 watt amplifier
« Reply #2 on: November 12, 2011, 06:02:08 PM »
Fully Tested yan...
Logged

Philippine Electronics Forum

Re: 250 watt amplifier
« Reply #2 on: November 12, 2011, 06:02:08 PM »

Offline tony

  • Technical People
  • Solar Power Satellite
  • *****
  • Posts: 5407
  • Pogi/Ganda Points: 521
  • Gender: Male
  • leach amp afficionado
Re: 250 watt amplifier
« Reply #3 on: November 12, 2011, 06:06:26 PM »
pnp input ltp with tail current supplied by ccs bc556, tail current is about 2mA therefore 1mA current flows for each input trannie...

tip41/42 is very slow compared to the output trannies composed of 2sc5200 and 2sa1493....it will work....pero sayang yung quality ng output trannies......
Logged

Philippine Electronics Forum

Re: 250 watt amplifier
« Reply #3 on: November 12, 2011, 06:06:26 PM »

Offline j a y k e z

  • Diesel Generator
  • *
  • Posts: 1992
  • Pogi/Ganda Points: 183
  • Gender: Male
  • gimmegaggigsss
Re: 250 watt amplifier
« Reply #4 on: November 12, 2011, 06:06:46 PM »
wow ampli pa sub po ;D

TS - ilan volt power supply nyan?
Logged

Philippine Electronics Forum

Re: 250 watt amplifier
« Reply #4 on: November 12, 2011, 06:06:46 PM »

Offline Disabled

  • Solar Power Satellite
  • *****
  • Posts: 5252
  • Pogi/Ganda Points: 316
Re: 250 watt amplifier
« Reply #5 on: November 12, 2011, 06:09:13 PM »
hmm parang 100watt ni pagarigan :) (hindi ung mj2955 based)
Logged

Offline jhon1977

  • Size C Battery
  • *****
  • Posts: 143
  • Pogi/Ganda Points: 5
Re: 250 watt amplifier
« Reply #6 on: November 12, 2011, 06:12:04 PM »
TS Supply voltage +50
Logged

Offline tony

  • Technical People
  • Solar Power Satellite
  • *****
  • Posts: 5407
  • Pogi/Ganda Points: 521
  • Gender: Male
  • leach amp afficionado
Re: 250 watt amplifier
« Reply #7 on: November 12, 2011, 06:12:37 PM »
rail is limited by the Vceo rating of the BD139/140......+/-40 volts any higher and you are risking it already....

changing these trannies along with the TIP41/42C you can use higher rails
Logged

Offline tony

  • Technical People
  • Solar Power Satellite
  • *****
  • Posts: 5407
  • Pogi/Ganda Points: 521
  • Gender: Male
  • leach amp afficionado
Re: 250 watt amplifier
« Reply #8 on: November 12, 2011, 06:13:35 PM »
Quote from: jhon1977 on November 12, 2011, 06:12:04 PM
TS Supply voltage +50

this will drop to about 40 volts when amp is loaded....depending on quality of power transformer used....
Logged

Offline tony

  • Technical People
  • Solar Power Satellite
  • *****
  • Posts: 5407
  • Pogi/Ganda Points: 521
  • Gender: Male
  • leach amp afficionado
Re: 250 watt amplifier
« Reply #9 on: November 12, 2011, 06:14:41 PM »
Quote from: Hengilbert on November 12, 2011, 06:09:13 PM
hmm parang 100watt ni pagarigan :) (hindi ung mj2955 based)

mj2955/2n3055 is the better mate for the tip41/42c....

+1 for the thread starter.....
Logged

Offline Disabled

  • Solar Power Satellite
  • *****
  • Posts: 5252
  • Pogi/Ganda Points: 316
Re: 250 watt amplifier
« Reply #10 on: November 12, 2011, 06:17:13 PM »
Quote from: tony on November 12, 2011, 06:14:41 PM
mj2955/2n3055 is the better mate for the tip41/42c....

+1 for the thread starter.....
hehe ok maste tony,
isa pa, bakit 0.1 ung emitter resistor sa output ???
Logged

Offline tony

  • Technical People
  • Solar Power Satellite
  • *****
  • Posts: 5407
  • Pogi/Ganda Points: 521
  • Gender: Male
  • leach amp afficionado
Re: 250 watt amplifier
« Reply #11 on: November 12, 2011, 06:20:04 PM »
Quote from: Hengilbert on November 12, 2011, 06:17:13 PM
hehe ok maste tony,
isa pa, bakit 0.1 ung emitter resistor sa output ???

if the output trannies are well matched i have no problem with that, but for peace of mind, 0.33ohm is even better...
Logged

Offline Disabled

  • Solar Power Satellite
  • *****
  • Posts: 5252
  • Pogi/Ganda Points: 316
Re: 250 watt amplifier
« Reply #12 on: November 12, 2011, 06:22:29 PM »
ok ty po master tony :)
+1

+1 din TS.
Logged

Offline jhon1977

  • Size C Battery
  • *****
  • Posts: 143
  • Pogi/Ganda Points: 5
Subwoofer
« Reply #13 on: November 12, 2011, 06:27:32 PM »
Logged

Offline Disabled

  • Solar Power Satellite
  • *****
  • Posts: 5252
  • Pogi/Ganda Points: 316
Re: 250 watt amplifier
« Reply #14 on: November 12, 2011, 09:00:19 PM »
Quote from: Hengilbert on November 12, 2011, 05:54:35 PM
floating ata ung input ground ;D
may diagram po bah to?
tambay..
sorry di pala floating :D
sadyang may ibang linya lang.. :)
Logged

Offline Johannah Aleksandria

  • Gas Turbine
  • **
  • Posts: 2279
  • Pogi/Ganda Points: 136
  • Make it simple
Re: 250 watt amplifier
« Reply #15 on: November 12, 2011, 09:28:03 PM »
250 watts needs at least 4 pairs of output trannies (for 4-ohms operation) and at least +/-70vdc.
MJE340 and MJE350 have the highest voltage for a Vas or driver, no worries.
With these kind of output arrangement, C8 and C9 may be omitted, parasitic oscillation would not be a problem.
Ang di ko maintindihan, yung value ng R5 at R6. May asterisk sya ts ah, ano ba sinasabi nyan?
Logged
Generations come and generations go, but the world stays just the same. What has happened before will happen again.

Offline tony

  • Technical People
  • Solar Power Satellite
  • *****
  • Posts: 5407
  • Pogi/Ganda Points: 521
  • Gender: Male
  • leach amp afficionado
Re: 250 watt amplifier
« Reply #16 on: November 13, 2011, 07:08:39 AM »
R6 is not really required, it can be replaced with a jumper, R5 drops about 1.5 volts and the current thru Q4 and Q5 is about 6mA....
Logged

Offline chinokscapsighter

  • Size C Battery
  • *****
  • Posts: 211
  • Pogi/Ganda Points: 81
  • Gender: Male
  • Chinoks_capsighter the imaginative painter.......
Re: 250 watt amplifier
« Reply #17 on: November 13, 2011, 11:16:14 AM »
meron ding ibang purpose yang r6 sir tony... for PCB designing para makalabas ang out ng Q1... :)
Logged

Offline Johannah Aleksandria

  • Gas Turbine
  • **
  • Posts: 2279
  • Pogi/Ganda Points: 136
  • Make it simple
Re: 250 watt amplifier
« Reply #18 on: November 19, 2011, 02:04:25 PM »
Quote from: chinokscapsighter on November 13, 2011, 11:16:14 AM
meron ding ibang purpose yang r6 sir tony... for PCB designing para makalabas ang out ng Q1... :)

Kesa mag jumper? ;D ;D
Ibahin mo na lang kaya ang design. :D :D
Logged
Generations come and generations go, but the world stays just the same. What has happened before will happen again.

Offline THXneo

  • Lead Acid Battery
  • *******
  • Posts: 536
  • Pogi/Ganda Points: 34
  • Gender: Male
  • DJ, Home Theater Fanatic
Re: 250 watt amplifier
« Reply #19 on: November 19, 2011, 03:49:54 PM »
Quote from: jhon1977 on November 12, 2011, 06:27:32 PM


meron po kyo diagram nito?pede po pa post.
Logged
More to Lose by Seona Dancing

Philippine Electronics Forum

Re: 250 watt amplifier
« Reply #19 on: November 19, 2011, 03:49:54 PM »
Pages: [1] 2   Go Up
« previous next »
 

Privacy Policy

Contact Us: elabph@yahoo.com