NOS Blackburn Mullard 12AU7 as a PI in 100 watt Marshalls

[Chester Nimitz]

Hey Dave i recently had old Mullard 12AU7's that i put in my 100 Marshalls in the Phase Inverter slots.

Are there any Pro's & Con's that i need to be aware of ?

Thanks ...

 

[RACKSYSTEMS]

not really if you like it

 

[Chester Nimitz]

Cool thanks !

 

[Chester Nimitz]

The AU7's wern't enough gain.

I got NOS 5751's in there now.

 

[glip22]

Every time I try a lower gain tube in an amp meant for 12ax7's it never has enough gain. I stopped bothering with it years ago in any slot.

 

[Chester Nimitz]

Every time I try a lower gain tube in an amp meant for 12ax7's it never has enough gain. I stopped bothering with it years ago in any slot.

+1] yep you're right. The 5751 wern't cutting it either. Put some NOS Blackburn Mullards back in the PI and Voila' ..... proper.

So much for lower gain.

 

[glip22]

Every time I try a lower gain tube in an amp meant for 12ax7's it never has enough gain. I stopped bothering with it years ago in any slot.

+1] yep you're right. The 5751 wern't cutting it either. Put some NOS Blackburn Mullards back in the PI and Voila' ..... proper.

So much for lower gain.

Good for cleaner or lower gain tones. But if you want that get a different amp

 

[Chester Nimitz]

The lower gain PI really cuts the output of the amps.

I like it LOUD ...