stacking oppamps question.

[SPAZ]

 Can any of you good guys elaborate or speak of experiences stacking oppamps on t.s. or similar circuts. I couldn't find threads on this subject. Are there any benefits besides head room as rumoured ?

[Dragonfly]

Can any of you good guys elaborate or speak of experiences stacking oppamps on t.s. or similar circuts. I couldn't find threads on this subject. Are there any benefits besides head room as rumoured ?

well, i used the word "stacking" with the [SEARCH] function and found these...i hope they help.....

http://www.diystompboxes.com/smfforum/index.php?topic=51862.0

http://www.diystompboxes.com/smfforum/index.php?topic=51185.msg383782#msg383782

http://www.diystompboxes.com/smfforum/index.php?topic=17023.0

http://www.diystompboxes.com/smfforum/index.php?topic=16784.0

http://www.diystompboxes.com/smfforum/index.php?topic=16943.msg97628#msg97628


all these threads are either about stacking op amps, or talk a bit about it in the tread...should give you some info....

[SPAZ]

  Thanks dragonfly. My bad on the search thing

[markm]

Here's something else that could interest you as well;

http://www.barberelectronics.com/parallelopamps.htm

[Dragonfly]

  Thanks dragonfly. My bad on the search thing

no problem...after a while, you learn the words that are most effective for searching this particular forum

ive been here too long.   

[markm]

  Thanks dragonfly. My bad on the search thing

no problem...after a while, you learn the words that are most effective for searching this particular forum

ive been here too long.   

Nahhhhh!

[ambulancevoice]

Dano from Beavis Audio wrote some stuff about opstack on his tube screamer page
http://www.beavisaudio.com/Projects/ScreamerLab/index.htm

[Dagreb]

So..... What would be the practical limit of stacking? (i haven't seen photos of more than 4) At some point won't the law of diminishing returns come in to play? Or could you be all "Nigel Tufnel" about it and have them higher than the knobs coming out of a hole in the enclousure?

[brett]

Hi
if the main effect is due to paralleling the output resistors, the effect is proportional to the number squared.  In other words, to get much effect past n=four requires a lot of op-amps.  But if you want to go to 9 or 16 or 25, it would be interesting to hear the results, literally. 
Personally, I can't see how this can have much effect, especially in a tubescreamer.  Except there is the usual commitment by the modifier to imagine an improvement.
cheers