Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: mightygrey on July 02, 2017, 03:35:16 PM

Title: Install Speedball before dropping-in 6SN7 input tube?
Post by: mightygrey on July 02, 2017, 03:35:16 PM

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.

Title: Re: Install Speedball before dropping-in 6SN7 input tube?
Post by: Paul Birkeland on July 06, 2017, 11:24:57 AM

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