Install Speedball before dropping-in 6SN7 input tube?

[mightygrey]

Hi guys,

Found some nice NOS Sylvania 6SN7GT tubes plus an adapter, and keen to see the differences between them and the stock 12AU7.

I understand they draw an additional 300mA current draw over the 12AU7(?), I have my Speedball update arriving later in the week - should I wait to install this before trying the new tube family?

Cheers,

Mightgrey.

[Paul Birkeland]

The heater current isn't directly related to the Speedball and the part of the circuit in which it operates.

As always, do one mod at a time! 

-PB