Dating a fender vibrolux
“For the Mustang, we cranked the reverb and it was surfing time.
And the each pickup position of the ’50s Strat was its own little slice of heaven ." Smith believes the amp’s original 15" CTS speaker is what makes the ’64 so special.
The normal and bright channels both had two inputs and controls for volume, treble, and bass.
The bright channel had additional knobs for reverb, and speed and intensity dedicated to the tremolo.
Some things are very obvious such as non-original or reconed speakers, non-original transformers, replaced pots, re-tweed, re-tolex, re-grill, etc.
Power-wise, the ’64 Vibro was constructed with an AA763 circuit, 12AT7 tubes for the phase inverter and reverb, and the optical-coupler tremolo that replaced the tweed-style effect.
Instead, there were approximately 2000 of these chasses produced, which then ended up as one of the three models in question.