Upgrade your Fender Blues Jr I/II/III/IV with improved bass response and midrange tone control sweep and quit burning through power tubes.
Mods:
Upgrade power filter caps w/ F&T capacitors
Upgrade screen grid resistors
Upgrade 1/4” speaker jack
Adjust amplifier’s bias resistor
Twin Tone Modification
Upgrade your Fender Blues Jr I/II/III/IV with improved bass response and midrange tone control sweep and quit burning through power tubes.
Mods:
Upgrade power filter caps w/ F&T capacitors
Upgrade screen grid resistors
Upgrade 1/4” speaker jack
Adjust amplifier’s bias resistor
Twin Tone Modification
