Here I replaced the .1UF 630V output coupling capacitor that was across terminals
#17 and #19
with a CRC .15uF 800v between terminal #17 and #B6 (terminal #19 was only used
as a solder junction in the original layout)
The cap (B55P154KXD) is a serious mil-spec, foil polypropylene, hermetic sealed,
high voltage, high current, metal case version from Component Research Company
(CRC), that I got from my audio buddy and mentor, John Day.