Thanks Joe,
I wondered how you dropped the filament voltage, smart idea.

Maybe I have to build the 50L6 version... :-)

Sal

Joe Bento wrote:


Very nice, Sal. Isn't it amazing just how loud 3 watts is when feeding
an efficient speaker? I'll have to remember the 50DC4. That resistor
is otherwise just a source of heat under the chassis.

I made another amp with a 12AX7 and 50L6. Did I post a photo? I don't
remember. Inserted again for your viewing pleasure. I havn't
transferred this one to a permanent chassis yet. In this one, the
primary of the transformer is wired for 240, giving 60V at the secondary
- perfect for the series string heaters. Plate voltage is then derived
through a solid state doubler. I alctually like the tone of the 50L6
better.

I think I'll stick with alumunum for most future projects. The black
powdercoat chassis, while very nice, is much harder to work with than
aluminum.

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