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Old 10th December 2010, 06:28 AM   #271
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please suggest me some other quasi bjt designs.
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Old 10th December 2010, 09:27 AM   #272
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@ apex

sir can you re design your qusai with a op amp input?
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Old 11th December 2010, 11:40 AM   #273
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Quote:
Originally Posted by rhodrich View Post
@ apex

sir can you re design your qusai with a op amp input?
No, but there is many similar schematics like this Peavey...
Regards
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Old 11th December 2010, 12:05 PM   #274
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Originally Posted by sudhir kumar View Post
please suggest me some other quasi bjt designs.
I suggest you this design MOSFET/BJT QUASI AMPLIFIER WITH PROTECT!!!
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Old 12th December 2010, 05:05 AM   #275
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how can i put 2sc2922 into this pcb pls explain. what is the max voltage of the transformer.
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Old 12th December 2010, 07:38 AM   #276
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is it ok for 4 pair of 2sc2922 ? what is the pcb size?
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Old 12th December 2010, 03:08 PM   #277
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Default which apex550w pcb layout is better?

which apex550w pcb layout is better?
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Old 12th December 2010, 03:25 PM   #278
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Judging from your questions, i'd say you're better off buying a commercial amplifier.
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Old 12th December 2010, 04:37 PM   #279
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Quote:
Originally Posted by nazirdigi View Post
which apex550w pcb layout is better?
First pcb by 'Mihailo' (post #80) is with DC protect and outputs on pcb. If you have some protect and outputs are on heatsink use second pcb, it's same amp anyway.
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Old 12th December 2010, 08:15 PM   #280
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sir can you re design your qusai with a op amp input?

Click the image to open in full size.

Q1, 2, 4, 5 2N3440/5415 or MJE 340/350
Bias transistor, just about anything.
Outputs (and drivers) 2N3773, MJ15022/24, etc.
Opamp LM318 (50V/s slew rate)

Protection was a DC crowbar, a thermal cut-out on the heatsink, and a circuit-breaker on the transformer primary.
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Last edited by djk; 12th December 2010 at 08:26 PM.
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