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Old 9th February 2006, 02:59 PM   #1
ATP is offline ATP  Thailand
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Question Need to make PA power amp

Am ATP from Thailand

Need to make PA power amp but is not have idae.
- Lokking to Crest audio and QSC around 1000w
- PCB layout and Schematic

Thank
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Old 9th February 2006, 08:25 PM   #2
AndrewT is offline AndrewT  Scotland
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Hi,
look up quasi.
or buy one from Workhorse.
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Old 10th February 2006, 02:53 AM   #3
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Hi ATP,

Do you know ALABPRO....they copy QSC, Lab Gruppen amps www.alabpro.com They are also in Thailand....
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Old 10th February 2006, 03:01 AM   #4
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Link is busticated.
Try this one... http://www.alab-pro.com/
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Old 10th February 2006, 03:41 AM   #5
quasi is offline quasi  Australia
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Quote:
Originally posted by AndrewT
Hi,
look up quasi.
or buy one from Workhorse.
Mine won't go to 1000w but the layout here will get to within 3dB(into 4 ohms) http://www.diyaudio.com/forums/showt...022#post797022 read posts #301 and #302.

Look at this chart http://www.diyaudio.com/forums/showt...932#post794932 read post #285

The schematic is here;
http://www.diyaudio.com/forums/showt...662#post818662 read post #325

If you are patient this amp is being developed and will be ready in about 2 months or so. http://www.diyaudio.com/forums/showt...251#post835251


Note; this will be an ambitious project, involving high voltages and very large power supplies. Unless you have many of the parts already and some experience, a unit from Workhorse would be a good idea.

Cheers & Good Luck
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Old 10th February 2006, 07:38 AM   #6
ATP is offline ATP  Thailand
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Thank.
But me need to DIY power amp.
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Old 11th February 2006, 03:46 PM   #7
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i dont know if its any good to you but i use a a bridged pair of k8060 velleman kit amps to get about 220 / 250watts rms.

at around 15 / 20 gbp () for board, all components exept heatsink and transformer its gotta be worth a look.

when i bridged mine i left off the diodes and used a single rectifier 300va transformer and 62000uf smoothing caps, wired to the on board smoothing caps so that the power share is equal for bridge.

at the input i ran a simpl tl072 twin op amp one side to invert, the other as a buffer to ensure ballanced drive.

with 4 amps, ie,, twin bridge for stereo, that is getting on for 1000wats, or 2 x 250w rms.

hope this is of interest, if not just ignore me, most ppl do..lol.. steve
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Old 11th February 2006, 03:56 PM   #8
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and if you realy want to do a total diy buy one and then redesign and reproduce to your hearts content..

or just copy it, but that is against copy rite law. lol..

steve
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