Topic: Class A?
Hey guys,
It´s me asking stupid questions again ... what the hell does "Class A Tube" mean??
I always read that and wonder what they are referring to .......
Eva
P.S.: Yes, the colour of my hair is blonde. 
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2 2009-02-21 18:19:30 (edited by JBJHJM 2009-02-21 18:26:29)
Re: Class A?
Wikipedia is your friend... Power amplifier classes - wikipedia.com
And if wiki is again too /%!%§**"$ here is a easier to understand info about amp classes:
http://www.audiomasterclass.com/arc.cfm … nd-class-d
Here are my tabbed songs by "Smokin' Joe": http://www.jbonamassa.com/forum/viewtopic.php?id=7236
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I LIKE MUSIC!
3 2009-02-22 01:00:34 (edited by stratpaulguy86 2009-02-22 01:01:31)
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Re: Class A?
The way I understood the differences between the 2 most common classes (Class A, Class AB) was that Class A is a very innefficient way to power an amplifier. There is a "push-pull" relationship between the power tubes in a Class AB circuit that allows for more dynamics and less heat dissipation. With Class A, however, they tend to get knarly quickly and have more compression with less dynamics. Good examples of TRUE Class A amplifiers are the Vox AC15, Fender Champ, Gibson GA-8, or just about any small gig/practice amplifier from the '50s and '60s. So Class A = more gain, more noise, more heat, less dynamics/headroom. Class AB = less gain, less noise, less heat, more dynamics/headroom.
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Re: Class A?
We love gear questions Eva! Thats a good Q.
No question is dumb here, I've certainly learned alot from this forum... I say ask away
Ben
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Re: Class A?
Okay. So what is the big hunk of wood with the six strings called? 
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Re: Class A?
Well Deezer that would be a stringed apparatus usually of different color, shapes and sizes, solid or hollow, used for making loud noise. For more information please contact your local intrument dealer. lol
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Re: Class A?
Thanks guys, that helps me out. So - they way I understand it, Class A is mainly used for small amps under 20 watts, right?
Eva
Deezer wrote:
Okay. So what is the big hunk of wood with the six strings called?
You´re meeean ....
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Re: Class A?
Eva Darling That is correct. You can get a lot of sound at a split second. The problem is (according to some) that they create heat for their size and they are not considered efficient.
To me that's no problem at all if you want to get a fat sound at a lower volume. That's all that really counts...that you get a sound you like with minimum fuss.
MuchLove
BigJeff
Rock On & Keep the FAITH
It is
Blues From the Bottoms
It is
Blues From the Bottoms
9 2009-02-23 01:28:22 (edited by Rocket 2009-02-24 23:06:15)
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Re: Class A?
stratpaulguy86 wrote:
The way I understood the differences between the 2 most common classes (Class A, Class AB) was that Class A is a very innefficient way to power an amplifier. There is a "push-pull" relationship between the power tubes in a Class AB circuit that allows for more dynamics and less heat dissipation. With Class A, however, they tend to get knarly quickly and have more compression with less dynamics. Good examples of TRUE Class A amplifiers are the Vox AC15, Fender Champ, Gibson GA-8, or just about any small gig/practice amplifier from the '50s and '60s. So Class A = more gain, more noise, more heat, less dynamics/headroom. Class AB = less gain, less noise, less heat, more dynamics/headroom.
If your impedance characteristic goes down far enough, statically or dynamically, then AB noise is no better than Class B (and it's STILL not as good ever as Class A). Tubes generate many "noisy" harmonics in Class A, ignored because they are "musical" 
.... Class A "inefficiency" is mostly large dollar$ and ¢ents involved in the huge power supplies and heat dissipation (heat sinking, translate "heavy metal", periodic elements wise not musical genre per se). High power A's DO exist and are very expensive and sound worth the price-mostly / or maybe !!! (They suffer as impedance characteristic decreases the same as AB).
I am referring to general audio amplification also, not "just guitar amps" here...
Rock On & Keep the Faith,
Rocket
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“Now, this isn’t your ordinary party crowd, here. I mean, there are professionals in here.”
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Re: Class A?
Rocket You are hilarious! As on old roadie and amp tech, I've forgotten so many things. Don't bother turning on the heat in the studio. Just turn on two of those bigA tube amps. They'll even sing when they get warm.
Rock On & Keep the FAITH
It is
Blues From the Bottoms
It is
Blues From the Bottoms
11 2009-02-24 23:03:43 (edited by Rocket 2009-02-24 23:08:35)
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Re: Class A?
Upstate New York in da winter, doz babies are extremely efficient too, I'll tell yah. You use dah onliest 'lectricity yah need, and heat yer place at da same time!!!! Voilà! And dey sing in tune too, yah gud!
Rock On & Keep the Faith,
Rocket
bigjeffjones wrote:
Rocket You are hilarious! As on old roadie and amp tech, I've forgotten so many things. Don't bother turning on the heat in the studio. Just turn on two of those bigA tube amps. They'll even sing when they get warm.
"He still doesn't charge for mistakes! "
http://jbonamassa.com/tour-dates/
"Everybody wants ta get inta the act!"
“Now, this isn’t your ordinary party crowd, here. I mean, there are professionals in here.”
"http://jbonamassa.com/tour-dates/
"Everybody wants ta get inta the act!"
“Now, this isn’t your ordinary party crowd, here. I mean, there are professionals in here.”