Shuttle 9.0 Q's for the tech savy / engineers

[chicago_mike]

So I replaced the stock ruby tube ( well chinese but anyways ) with an NOS RCA for now.

For the enigneer: Are both triodes used in the shuttle 9 and where? Are they cascaded? One right after the other, or does one triode feed into the preamp and the other post?

My basses have HOT outputs and I am looking for the cleanest most ammount of gain I can get.

I have alot of tubes to go thru: JJ , RCA , Phillips, JAN, GE..
AX7's / AT7's / AY7's / BH7's ( I LOVE this tube ) / DW7's even..nos! I think a magnavox or two too.

And what is the plate voltage? I havent put the pins to a voltmeter yet.

I think what I'll do is put up some clips at some point of the different tubes at different gain settings.

[B String]

Originally Posted by chicago_mike

So I replaced the stock ruby tube ( well chinese but anyways ) with an NOS RCA for now.

For the enigneer: Are both triodes used in the shuttle 9 and where? Are they cascaded? One right after the other, or does one triode feed into the preamp and the other post?

My basses have HOT outputs and I am looking for the cleanest most ammount of gain I can get.

I have alot of tubes to go thru: JJ , RCA , Phillips, JAN, GE..
AX7's / AT7's / AY7's / BH7's ( I LOVE this tube ) / DW7's even..nos! I think a magnavox or two too.

And what is the plate voltage? I havent put the pins to a voltmeter yet.

I think what I'll do is put up some clips at some point of the different tubes at different gain settings.

There are a number of us who would be very interested in your findings. Please let us know what happens.

[vin*tone]

FWIW a lot of people - myself included - tried different tubes in the Shuttle 6.0 and heard very little change in tone.

[seamonkey]

The engineer Agedhorse has posted many times that he specifically designed the preamp so the variance of tubes would have little effect on the sound.

Can't win - because people like to roll tubes and hear the difference in sound. Some amp maker should install some kind of revolver that you can spin and it selects different tubes.