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Old 28th January 2004, 08:50 PM   #1
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Default Why no MOSFETs?

I'm not knowlegeable at all. Most of what is written here loses me. However there is something that generally puzzles me. So few posts about MOSFETs.
I always believed that : valves(tubes) won't work for big amp (500W) and are fragile. Transistors are a little ......cold. FETs give a warmer sound while handeling real power and being robust.
...................... very little talked about. Why?
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Old 28th January 2004, 09:03 PM   #2
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Look at the passlabs section......mosfets...mosfets...and mosfets, and if you have a different solution....someone will convert your idea to work with mosfets

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Old 28th January 2004, 09:12 PM   #3
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There are plenty of MOSFET designs in the Solid State forum too.
Look around a little bit more and I think you will come to a different
conclusion. Then, some people prefere BJTs and some prefer MOSFETs,
but that's to be expected and encouraged I think.
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Old 28th January 2004, 09:19 PM   #4
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You missunderstand me. I do mean WHY? . There are a few projects true but they are mostly very small. I never see 500W projects. Yet I see professional units all the time. If I needed a big amp I could easily buy one, but the reasoning interests me.
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Old 28th January 2004, 09:25 PM   #5
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there are a few >200w projects talked about and some of them, I should say more than a fair share of them, are mosfet amps.
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Old 28th January 2004, 09:38 PM   #6
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OK, get your point. One reason might be that most people don't
find the need for such immense power. Another thing worth noting
is that some designs are more or less easily scalable to higher
powers by paralleling output devices (and maybe drivers). Take
for instance Slones Optimos design, which is scalable up to 400W.
I think also Holtons amp can be configured for various power levels
up ot around 400W. I you need more, I am sure both of these could
be slightly modified to cater for that. Pick you choice of amplifier and
start a thread on how to modify it for higher output power.
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Old 29th January 2004, 10:21 AM   #7
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Hello PBassred.

I would like to assit u in disscussing Mosfet amplifier upto 2KW
Lets get to new thread and i have an idea for something new in linear amps.

Regards
Ampman
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Old 29th January 2004, 10:55 AM   #8
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Quote:
Originally posted by Pbassred
You missunderstand me. I do mean WHY? . There are a few projects true but they are mostly very small. I never see 500W projects. Yet I see professional units all the time. If I needed a big amp I could easily buy one, but the reasoning interests me.
Why? I like mosfets and they are hard to destroy but I'm also fully aware of it's drawbacks. Sometimes BJT are much better.
It's a matter of knowing the part and it's characteristics.

Hello, Mr. Ampman. You are fantastic. Why don't you put a website with all your stuff. I wonder how your amps look like.
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Old 29th January 2004, 03:51 PM   #9
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Quote:
Originally posted by peranders
Hello, Mr. Ampman. You are fantastic. Why don't you put a website with all your stuff. I wonder how your amps look like.
Absolutely incredible guy, what a resource on this board!!!

AmpMan.. is 2kW really the limit!??
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Old 29th January 2004, 04:20 PM   #10
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Quote:
Originally posted by peranders

Hello, Mr. Ampman. You are fantastic. Why don't you put a website with all your stuff. I wonder how your amps look like.
Hi P-e-r-a-n-d-e-r-s
ThanX for ur advice about Website, I will certainly Think about it!
As far fantasticity is concerened I think u r more fantastic than ampman, aren't u.
To be serious 2KW is not end of my limit.

Regards
Ampman
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