Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: scstill on January 09, 2024, 12:10:33 pm

Title: 6AU8 for PP and PI
Post by: scstill on January 09, 2024, 12:10:33 pm

Thinking of a experimenting with two 6AU8a configured in push pull and long tail
Each tube has a sharp pentode and triode

Spec says keep impedance low on pentode cathode to reduce cross coupling (how low?)
Thinking if I run grid around -1v could get gm (gain?) close to el84
Triode has gain of a 12ay7

What do you think? anyone do this before?

Title: Re: 6AU8 for PP and PI
Post by: tubenit on January 10, 2024, 04:42:26 pm

You might want to take a look at the ideas here:   Low watt p/p amp gallery (el34world.com) (https://el34world.com/Forum/index.php?topic=12526.0)


With respect, Tubenit