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  #1  
Old 20th September 2016, 05:47 PM
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pre65 pre65 is offline
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Default 50W SEM amp.

SEM = single ended mosfet.

Using 1 X IXCS IXFN140N20P mosfet per channel, and another one as a CCS.

So four big mosfets in total, and a circuit courtesy of "papa Pass".

I'm just collecting parts at the moment, already found two 15A 60v EI transformers and got some lovely heatsinks a while ago.

Photo to follow when work commences.

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Old 28th September 2016, 01:42 PM
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Default Re: 50W SEM amp.

I'm making two boxes for the power supplies at the moment, from 18mm BBP.

The pieces are all cut (by hand saw), and are now being routed to the exact size.

Stage 2 is to rout all the joins so they go together square.
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Old 28th September 2016, 06:53 PM
Richard Richard is offline
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Default Re: 50W SEM amp.

Nice one Philip, is it a finished circuit or a "try this" ?
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  #4  
Old 30th September 2016, 11:53 AM
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Default Re: 50W SEM amp.

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Originally Posted by Richard View Post
Nice one Philip, is it a finished circuit or a "try this" ?


Well, I suppose it's a "try this" at the moment.

There is a thread on DIY Audio about it , and by the time I've got to the point of finishing it I hope someone else will actually have one working.

I'm still in routing BBP mode at the moment.
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Old 30th September 2016, 05:16 PM
Richard Richard is offline
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Default Re: 50W SEM amp.

Ah ok thanks Philip, had a quick look there but couldn't see it. Be interesting to hear how you get on (What's BBP btw - Baltic Birch Ply?)
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  #6  
Old 30th September 2016, 05:27 PM
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Default Re: 50W SEM amp.

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Originally Posted by Richard View Post
Ah ok thanks Philip, had a quick look there but couldn't see it. Be interesting to hear how you get on (What's BBP btw - Baltic Birch Ply?)
Yes, BBP = Baltic Birch Ply.

I had a full sheet (1200 x 2400) in stock so decided to use some.
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Old 30th September 2016, 07:38 PM
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Default Re: 50W SEM amp.

I think he means Audio-Talk
http://www.audio-talk.co.uk/phpBB3/v...hp?f=11&t=6575
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Old 1st October 2016, 02:39 PM
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Default Re: 50W SEM amp.

Thanks, will have a look
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  #9  
Old 8th February 2017, 11:52 AM
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Default Re: 50W SEM amp.

I've actually made a start on it.



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  #10  
Old 17th February 2017, 12:22 PM
bikerhifinut bikerhifinut is offline
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Default Re: 50W SEM amp.

Blimey what a beast! nobody can accuse you of skimping on the PSU Philip!
When you get it built please tell us how it compares. It looks intriguing.


Andy.
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