FETs - interesting devices
- bajaman
- Old Solderhand
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Hi Folks
Here is some very interesting reading
members/archive/FETS/
offline:[/b][/u]
http://www.nutsvolts.com/~downloads/fetmay.pdf
http://www.nutsvolts.com/~downloads/fetjun.pdf
http://www.nutsvolts.com/~downloads/fetjul.pdf
http://www.nutsvolts.com/~downloads/fetaug.pdf
Enjoy
Steve
Here is some very interesting reading
members/archive/FETS/
offline:[/b][/u]
http://www.nutsvolts.com/~downloads/fetmay.pdf
http://www.nutsvolts.com/~downloads/fetjun.pdf
http://www.nutsvolts.com/~downloads/fetjul.pdf
http://www.nutsvolts.com/~downloads/fetaug.pdf
Enjoy
Steve
Last edited by modman on 06 Jan 2009, 10:59, edited 3 times in total.
Reason: added link to new location
Reason: added link to new location
- soulsonic
- Old Solderhand
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Yeah, good stuff. Anything to help me understand these damned FETs better is a big help to me.
Is it just me, or is a tube a million times easier to bias than a FET? Ive never had any problems getting tubes to do what I want. Even when I was completely ignorant of what was actually happening in a tube, I still didnt have any problems getting them to work. But with FETs, they are such a mess its unbelievable. I feel completely hopeless when Im trying to get one to work right the first time. I have gotten MOSFETs to work well, but I am always thinking, "why do I need all these extra resistors?". It just doesnt seem practical to me.
Is it just me, or is a tube a million times easier to bias than a FET? Ive never had any problems getting tubes to do what I want. Even when I was completely ignorant of what was actually happening in a tube, I still didnt have any problems getting them to work. But with FETs, they are such a mess its unbelievable. I feel completely hopeless when Im trying to get one to work right the first time. I have gotten MOSFETs to work well, but I am always thinking, "why do I need all these extra resistors?". It just doesnt seem practical to me.
- bajaman
- Old Solderhand
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Hi soulsonic
I love tubes too.
You can run them off all sorts of voltages and get completely different sounding music.
Fets take a little bit more getting used too - and they are inherently noisier than the good old 12AX7 or ECC83 for our European friends
My personal favourite jfet is the 2SK117 - Roland/Boss use them (and so do Tech 21, I am led to believe, in their Sans Amp Classic pedal - much better sounding pedal than the GT2, which does not use one )
I do hope you persevere though - practice makes perfect, as they say - hope you get some interesting new design ideas from these articles - I feel a BOOTEEK pedal design coming on
Cheers
Steve
I love tubes too.
You can run them off all sorts of voltages and get completely different sounding music.
Fets take a little bit more getting used too - and they are inherently noisier than the good old 12AX7 or ECC83 for our European friends
My personal favourite jfet is the 2SK117 - Roland/Boss use them (and so do Tech 21, I am led to believe, in their Sans Amp Classic pedal - much better sounding pedal than the GT2, which does not use one )
I do hope you persevere though - practice makes perfect, as they say - hope you get some interesting new design ideas from these articles - I feel a BOOTEEK pedal design coming on
Cheers
Steve
- soulsonic
- Old Solderhand
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Funny you should mention the 2SK117.... so far that's the JFET I've had the most success with.
I'm sure I'll get it down to where I'm as quick with it as I am with tubes, but I really wish it didn't require all the additional biasing stuff. With tubes, if you have the bias way off it just sounds bad - with a JFET or MOSFET, you get no sound at all!
I'm sure I'll get it down to where I'm as quick with it as I am with tubes, but I really wish it didn't require all the additional biasing stuff. With tubes, if you have the bias way off it just sounds bad - with a JFET or MOSFET, you get no sound at all!
- bajaman
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That is the problem with 9 volt stuff - not much margin of error
Now with a tube running off 240 - 380 volts
Cheers
Steve
Now with a tube running off 240 - 380 volts
Cheers
Steve
- modman
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Moved to the FAQ section, good excuse for a
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- bajaman
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(check first post for link)
enjoy
bajaman
enjoy
bajaman
be kind to all animals - especially human beings
- modman
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yeah, it was very late, I should have checked.Fuzzer wrote:But now the PDFs are gone.
I hope this isn't a NZ based mag, will setup a central library folder or something later today.
thanks for saving
Last edited by modman on 06 Jan 2009, 11:01, edited 1 time in total.
Reason: rehosted to archive folder
Reason: rehosted to archive folder
Please, support freestompboxes.org on Patreon for just 1 pcb per year! Or donate directly through PayPal
- puppiesonacid
- Cap Cooler
I hope this isn't a NZ based mag, will setup a central library folder or something later today.
thanks for saving[/quote]
that would be a great idea. I was bummed when i realized it was so long ago haha, I was thinking " okay, maybe I should try to learn some more today and clicked excitedly, to no avail...
thanks for saving[/quote]
that would be a great idea. I was bummed when i realized it was so long ago haha, I was thinking " okay, maybe I should try to learn some more today and clicked excitedly, to no avail...