Mike Stehr
Poverty Audio
Those 801A's are going to force me to learn DC heating if I'm going to use them for anything. I could only imagine what 7.5 volts of thoriated tungsten filamant sounds with alternating current.
A 45 would be easy, you can just heat those with AC. The filament voltage is minimal and easy to compensate for.
But them 801A's sure glow purdy. I want to eventually use them for a linestage, I have some 600 ohm line out OPT's that match up with the 801A's 5K plate resistance. But the linestage will be huge, and getting it with minimal noise will be a challenge.
A 45 would be easy, you can just heat those with AC. The filament voltage is minimal and easy to compensate for.
But them 801A's sure glow purdy. I want to eventually use them for a linestage, I have some 600 ohm line out OPT's that match up with the 801A's 5K plate resistance. But the linestage will be huge, and getting it with minimal noise will be a challenge.