tubes 4 hifi
 "the path of least resistance is through a vacuum"

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Dual Rectifier Mod

Highly recommend for ST120 tube amps!
Note: If you have triode/pentode switching installed
You must either relocate the switches or remove them.


front view


top front view


bare PCB


fully stuffed PCB with all capacitors


wiring from bottom to top of chassis


wired board ready to mount


photo from bottom side of chassis

dual rectifier mod PCB
includes two tube sockets
$30 includes shipping (inside USA only)
complete capacitor and parts kit to replace quad cap $60
mounts on top of the dual rectifier mod PCB



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 tubes 4 hifi
 "the path of least resistance is through a vacuum"