I'm working on a preamp, and planning to use the 6BW4.
http://www.radiomuseum.org/tubes/tube_6bw4.html
In the schematic diagram, the first cap says 40uF. That is fine. The resistor after says 100 ohm max. Is that accurate? What about the PI filter resistors after that? Do they have to be small values also? Can the caps after the first filter section be bigger than 40uF?
Thanks!
Blair