ashevans09 Posted December 10, 2007 Share Posted December 10, 2007 What exactly is Mosfet, and why do some companies value it over tubes?! Argh I'm confused Any help appreciated! Quote Link to comment Share on other sites More sharing options...
Alien Posted December 11, 2007 Share Posted December 11, 2007 Metal Oxide Semiconductor Field Effect Transistor. To the layman, the only important word is the last one As to why they're preferred over valves, well, price and weight are the obvious answers. Andy Quote Link to comment Share on other sites More sharing options...
Bloodaxe Posted December 11, 2007 Share Posted December 11, 2007 [quote name='Alien' post='102502' date='Dec 11 2007, 12:24 AM']Metal Oxide Semiconductor Field Effect Transistor. To the layman, the only important word is the last one Andy[/quote] Well... last three words, really. The FET is essentially a transistor that works very much more like a valve than a regular non-FET (bipolar) transistor does, so thus sounds a [i]bit[/i] more valve-like. No comparison to a nice line of red-hot & glowing EL34s though. [url="http://en.wikipedia.org/wiki/Field_effect_transistor"]Slightly technical Wikipedia article on FETs[/url] [url="http://www.satcure-focus.com/tutor/page4.htm"]Non-technical article on Bipolar (=regular) Transistors[/url] Pete. Quote Link to comment Share on other sites More sharing options...
chris_b Posted December 11, 2007 Share Posted December 11, 2007 [quote name='Bloodaxe' post='102514' date='Dec 11 2007, 01:56 AM'].... No comparison to a nice line of red-hot & glowing EL34s though....[/quote] In your opinion. MOSFET technology has produced many highly rated bass and PA amps. Quote Link to comment Share on other sites More sharing options...
Merton Posted December 11, 2007 Share Posted December 11, 2007 [quote name='chris_b' post='102551' date='Dec 11 2007, 09:00 AM']In your opinion. MOSFET technology has produced many highly rated bass and PA amps.[/quote] +1 I have to say, I am rather partial to the FET preamps of the TE Commando amps and the Eden Nemesis amps, nice and simple just like me!! Quote Link to comment Share on other sites More sharing options...
GreeneKing Posted December 11, 2007 Share Posted December 11, 2007 [quote]In your opinion.[/quote] Strange comment Pete didn't say it was anyone elses. Quote Link to comment Share on other sites More sharing options...
Bloodaxe Posted December 11, 2007 Share Posted December 11, 2007 (edited) [quote name='chris_b' post='102551' date='Dec 11 2007, 09:00 AM']In your opinion. MOSFET technology has produced many highly rated bass and PA amps.[/quote] I didn't say it hasn't - I just said that there was a significant difference 'twixt Bipolars, FETs & Bottles. In my time I've owned & cranked a Bipolar 200W Hiwatt head, a Marshall 100W 4 x EL34 head, an Axis 200w 4 x EL34 head, and a Marshall 2 x 200W MOSFET Power amp. All four were very different as you'd expect. The only two that could have a valid side-by-side comparison were the two tube heads & even that's pushing it owing to the design of the Axis. To summarise: FETs are just another way of making things louder. Whether it's the tight kind of loudness for you is, well, down to you. Pete. Edited December 11, 2007 by Bloodaxe Quote Link to comment Share on other sites More sharing options...
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