Any thoughts on using 6GK6s (or the cheap as dirt 10GK6s or 16GK6s)
in place of EL84s? Other than a slightly different pinout, the tube characteristics are fairly close to 6BQ5s.
G2 connects to pin 8, and K and G3 are separately connected to pins 3 and 1/9 respectively.
6CW5/EL86s and their 10V and 15V (PL84) filament brethren have the same pinout as EL84s, but their ratings are somewhat less robust, they might not be too happy with 360VDC on the plate and G2.
/ed B in NH (always looking for a cheaper way out...)