Class A and AB amps...

[lex666]

Whats the difference? What class would my TSL602 be? Are there advantages or changes in tone?

Educate me! Thanks!

 

[aleclee]

Re: Class A and AB amps...

As the resident Class A pedant, I'll refer you to these threads:

https://forum.seymourduncan.com/showthread.php?t=15314
https://forum.seymourduncan.com/showthread.php?t=15315
https://forum.seymourduncan.com/showthread.php?t=22886

Your TSL is Class AB. Other than the THD Bivalve, I can't think of a non-single-ended (i.e., >1 power tube) amps that is truly Class A. Most builders in recent years have spread confusion, describing their amps as Class A when they actually mean cathode biased.

 

[Curly]

Re: Class A and AB amps...

I don't know if the link is in those threads, but Aiken amps has a couple good discussions of class A amps in their tech section

 

[aleclee]

Re: Class A and AB amps...

I don't know if the link is in those threads, but Aiken amps has a couple good discussions of class A amps in their tech section

I have a couple of links to Randall's stuff in the first thread.

 

[tone4days]

Re: Class A and AB amps...

go to http://www.mesaboogie.com/US/Smith/ClassA.htm ... it is a .pdf you can read that explains it very well

 

[aleclee]

Re: Class A and AB amps...

go to http://www.mesaboogie.com/US/Smith/ClassA.htm ... it is a .pdf you can read that explains it very well

There are some issues with that, too. This thread breaks it down pretty well.

 

[Gearjoneser]

Re: Class A and AB amps...

For the super-layman, Class AB is like a boxer using both fists to work a speedbag.
Class A is when he does the final punch, with one right handed blow.
Even Rocky could understand that one.....LOL

 

[tone4days]

Re: Class A and AB amps...

yeah, i picked up on those 'quirks' in the boogie write up too ... but i thought that it was a reasonably good beginner treatment of the topic to at least get him started

cheers
t4d

 

[Quencho092]

Re: Class A and AB amps...

are there any real class a amps out there besides the uni valve and bi valve amps?

 

[54stratlover]

Re: Class A and AB amps...

actually the univalve is the class A. the Bi-valve will function as a class A/B when driven hard. I just got a univalve and am exploring the intricasies of class A, and I like it.

 

[italic zero]

Re: Class A and AB amps...

The vast majority of true class A amps would have a single output tube, right? What was the first AB amp?