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Amp Internals 2

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kedwardsleisure View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 17 August 2011 at 5:58pm
Drives 10 IXYS igbts via the wee transformer.

Mains switch is on secondary side, SMPSU stays powered up 24/7

Uprated caps to Nichicon 200V and fitted NTC to stop my 13A socket switch welding in.



Edited by kedwardsleisure - 17 August 2011 at 6:01pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote andyamp Quote  Post ReplyReply Direct Link To This Post Posted: 17 August 2011 at 6:01pm
looks like the pulce circuit
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 17 August 2011 at 6:05pm
Yeah very similar, hope they got the IGBT driver transformer right!

Also uses VIPer smpsu for standby circuit fed off main DC bus.
Maybe copied off taiwanese blue ray player?


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Post Options Post Options   Thanks (0) Thanks(0)   Quote andyamp Quote  Post ReplyReply Direct Link To This Post Posted: 17 August 2011 at 6:09pm
hope they do not.
top switch rule ok
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 17 August 2011 at 9:10pm
10 IGBT's? What crazy topology are they running?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 17 August 2011 at 10:41pm
erm

sorry 8 igbts for switching plus 2 secondary regulators.

So single DC bus and bipolar drive to smpsu transformer

DC capacitors are just 2 180V 1000uF units in series off the AC line rectifier.







Edited by kedwardsleisure - 17 August 2011 at 10:48pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 17 August 2011 at 11:06pm
Full bridge SMPS with paralleled IGBT's then?  They haven't gone the whole hog and done a phase shifting full bridge because they'd need two transformers for that.

Still surprised that with the high spec IGBT's available nowadays that they need that many.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 17 August 2011 at 11:12pm
I think these are 40A each

Can't remember the type, all boxed up now, prob IXGH40N120

2 x 2700W into 2R

Input rectifier is 50A

More glue than behringer and twice as sticky!!




Edited by kedwardsleisure - 17 August 2011 at 11:15pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Garra-67 Quote  Post ReplyReply Direct Link To This Post Posted: 21 August 2011 at 11:38am
Crest Pro 8200


PowerSoft Digam Q3204



Edited by Garra-67 - 21 August 2011 at 11:59am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 24 August 2011 at 9:35pm
Ampeg SVT Classic





Edited by kedwardsleisure - 24 August 2011 at 9:36pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote googlebobby Quote  Post ReplyReply Direct Link To This Post Posted: 08 September 2011 at 11:07am
Could anyone tell me how to post the images so that I could post the amp that I had been used.
 
BGW/CREST AUDIO/MC2.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote djeddie Quote  Post ReplyReply Direct Link To This Post Posted: 08 September 2011 at 12:55pm
Originally posted by googlebobby googlebobby wrote:

Could anyone tell me how to post the images so that I could post the amp that I had been used.
 
BGW/CREST AUDIO/MC2.

There's a 'how to post pics' guide in the newbie section... but I don't know if you can post up pics until you posted enough comments?
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