Fender reveb tank dating
It is so easy to enable and disable that it can hardly be called a mod.This is the preamp tube for the normal channel which you are not using when playing the Vibrato channel. It has stood the test of time and been been done by players in 50 years in blackface Fender amps.
The vibrato bug is a four-wire device consisting of a neon tube and light-dependent variable resistor, packaged in a short section of black tubing. The tube generated vibrato oscillator pulsates the neon light, which varies the resistance on the resistive element.
Silverface Twin Reverb[ edit ] In the Fender amplifier line switched from the original black faceplate to a new brushed aluminum faceplate with light blue labels except the Bronco, which has red and changed the color of the grillcloth from silver grey to silver with sparkling blue threads embedded within it, ushering in the Silverface era. Since the tube complement was the same, Fender just used up their stock of printed tube charts saying AB until they ran out.
Early silverface amplifiers made between and had black lines on the brushed aluminum faceplate, still retaining the '60s "tailed" design on the amp logo, installed on the upper left side of the grillcloth.
One side effect with this mod is a noticable click and a volume difference between tremolo on and off using the new spst pot.
The Normal channel has two inputs, a "bright" switch which compensates for loss of brightness through the volume control when the control is set lower than about "6" on its scalea volume control, treble, middle and bass tone controls.
Very practical mod at practice and low volume environments.