Where are the 833 amps?

[hpeter]

i tought the 2a3 will be headphone endgame, but there is something extra in thorium and graphite to sound.............

on ebay once were cheap 801a´s ... did not bought them

[drbarney1]

Vinylsavor recommends the 801 but you really have to filter tungsten cathodes or they will hum. It might work with higher impedance headphones. Consider the 45 which you can heat with a 2.5 center tap transformer and the center tap to the cathode resistor with a capacitor in parallel to the resistor for no feedback and lower output impedance.

It would be fun to see a youtube video of an 833-A or even a GM-100 driving headphones with the listener's head exploding like in that ridiculous movie Scanners where you could see if you look for it the difficulty the actors have keeping straight faces while filming it.

[thuanth43]

Originally Posted by hpeter

i tought the 2a3 will be headphone endgame, but there is something extra in thorium and graphite to sound.............

on ebay once were cheap 801a´s ... did not bought them

[hpeter]

Originally Posted by thuanth43

ayyyyyyyyy ha !