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Old 20th November 2009, 03:20 PM   #1
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Default Simple 200 watt complimentary FET amplifier (possibly tube driver?)

I am looking for ideas on a simple 200 watt ss amplifier (full complimentary output) using FET devices.

Recently I am convinced that a solid-state amplifier is the way to go instead of trying to scrape together a high power tube amplifier.

How difficult is it to add a tube based driver stage to a solid-state output stage?

TIA
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Old 20th November 2009, 04:32 PM   #2
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How knowledgeable are you?

There are lots of good kits for SS amps, if you want to build a known design; some of these have FET output devices.

If you want to design your own, I suggest you start off by looking at some of the existing designs, and understanding the issues that they solve.

Hybrid designs (tubes+ SS output) exist; they are some what harder to do well, due to the lack of P-type tubes, but some very good ones have been published.

What is the intended use of the amp? The design tradeoffs for say driving the low-bass in a PA system are fairly different to those for driving a Hi-Fi system.
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Old 20th November 2009, 09:20 PM   #3
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I designed my own MOSFET amp with a tube front end.

I opted for an SRPP stage driving into a standard class AB MOSFET amp with the gain reduced to allow for the tube gain. It sounds very clean. If your not after a clean sound (ie guitar amp) then a more basic tube stage might be in order.
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Old 21st February 2010, 02:53 PM   #4
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Default Can i have the design?

Dude,
Could i get the circuit design from you for this amp?
I've wanted to build a hybrid for a while.

Quote:
Originally Posted by nigelwright7557 View Post
I designed my own MOSFET amp with a tube front end.

I opted for an SRPP stage driving into a standard class AB MOSFET amp with the gain reduced to allow for the tube gain. It sounds very clean. If your not after a clean sound (ie guitar amp) then a more basic tube stage might be in order.
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Old 21st February 2010, 04:10 PM   #5
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Quote:
Originally Posted by deltavektor View Post
I am looking for ideas on a simple 200 watt ss amplifier (full complimentary output) using FET devices.

Recently I am convinced that a solid-state amplifier is the way to go instead of trying to scrape together a high power tube amplifier.

How difficult is it to add a tube based driver stage to a solid-state output stage?

TIA
Have you thought about a hybrid ?
Power of a MOSFET with a valve sound.
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Old 21st February 2010, 09:47 PM   #6
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Default MOSFET Amp Full Simetry

APEXaudio Simple 240/350W MOSFET Amp.
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Old 15th May 2011, 07:15 AM   #7
momon is offline momon  Indonesia
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pcb lay out?
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