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Old 15th May 2012, 06:17 PM   #21
Aniket is offline Aniket  India
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thanks friends.

@djk how could i get more power out of this amp.

please advice if i could increase its output power.
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Old 15th May 2012, 07:00 PM   #22
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A higher power variant on this amp would be the Bip300 by Quasi.
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Old 16th May 2012, 07:25 AM   #23
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"@djk how could i get more power out of this amp."

How much power?

What is it for?

Crown made the M600, M2000, MA10K all using the 2N3773.

The more outputs the more power (and a bigger power supply).

The M600 is a bridge amplifier.

The M2000 and MA10K are bridged bridge amplifiers (although the MA10K would only do 7KW continuous, 10KW on program material).

The M2000 was frequently used to generate a clean 120V/60hz for medical equipment.
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Last edited by djk; 16th May 2012 at 07:28 AM.
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Old 16th May 2012, 09:55 AM   #24
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Crown MA10K is 10KW/0.5Ω 1Khz tone burst.

Click the image to open in full size.

Top layer has 80pcs 2N3773, second layer the same (160pcs total).

Click the image to open in full size.
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Old 16th May 2012, 10:05 AM   #25
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i love statistics

I wonder if any moderator could actually "wash" through posts that originate from India where 9 out of 10 ask for more power

Is it DNA issue??? is it a local problem??? ( big amplifiers are too expensive ? ) who knows ....interesting though .....
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Old 16th May 2012, 10:18 AM   #26
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Everyone seems to want an endless amount of power, I just thought I would show how the lowly 2N3773 can be used to make a 10KW amplifier (should you think you need one).
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Old 16th May 2012, 02:50 PM   #27
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by djk View Post
Everyone seems to want an endless amount of power, I just thought I would show how the lowly 2N3773 can be used to make a 10KW amplifier (should you think you need one).
The 3773 is a good output device for one that is limited by 140Vceo.

let's start with a +-65Vdc supply, that allows for a bit of overvoltage for the mains electricity supply. That supply will allow a maximum output of ~60Vpk into a suitable load.
60Vpk into 1r0 is equivalent to 1800W.

Now design and build those 3773 into a +-65Vdc balanced amplifier.

We can expect 3600W into a 2r0 load.

If sufficient capacity is built into the amplifier it could even be designed using a lot of skill to drive a 1r0 load to ~7kW.

Is that close enough to 10kW?

But, I would never recommend putting all my assets into a one amplifier PA duty. I would much rather have seven or eight 1kW amplifiers driving the speakers for my paying audience.
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Old 16th May 2012, 08:02 PM   #28
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"The 3773 is a good output device for one that is limited by 140Vceo.:

In the MA10K they are hand-selected to allow for the 163V it runs at.

I agree with the 'not all the eggs in one basket' principle too.

The raceway at Indianapolis uses 140V lines with 465 loudspeakers driven by racks of MA10K.
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Old 20th May 2012, 07:59 AM   #29
Aniket is offline Aniket  India
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Thanks for the replies friends.

@djk- i got your point, more outputs more power which i know already

@gaetan8888- thanks a lot for your help. what i need to ask is adding more output trans. using the same circuit and same power supply which i have and build(uploaded the pics as well), what more changes(component values, transistors etc) i need to change.

@sakis- if you dont want posts originated from India then better not watch and post irrelevant to the subject or theme. I be a member of DIY to learn a lot and share little that i know.
Do you own DIY or DIY audio belongs to you. It seems a problem for you from where a member belongs. You should encorporate a filter or moderator not to allow people from India to be a member of DIY. I know that DIY is open for everyone no matter where you are from. I came here to learn, dont make this a bitter experience.

and I am not fond of car audio and car audio magazines.

Thanks
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Old 20th May 2012, 12:43 PM   #30
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"using the same circuit and same power supply"

And how, pray tell, can you possibly expect any real increase in power without increasing the power supply voltage (and current)?
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