Fender Concert 1962 Brown

This version of the Concert amp was produced between late 1960 and 1963. This version utilized the 6G12-A circuit. As with all of the Concerts during this time, it was also a two-channel amp, but the vibrato circuit had been substantially changed and now required the addition of another preamp tube. Looking at the schematic of this amp, it appears the greatest change to the vibrato circuitry is in the oscillator area of the circuit. This part of the circuit became much more simplified than its predecessor, and by the looks of it became the basis for the oscillator found in the popular opto-isolator version used today. While there indeed was another tube added to this new design, the tube was used to take the output of the oscillator circuit and produce two out-of-phase oscillator signals. These were then fed to the modulation part of the circuit, which would modulate the audio signal. The audio signal was split in order to feed two different amplifiers in the modulation circuit, but because the signal was split through different RC (resistor/ capacitor) networks, there was a slightly different signal being fed to each of the two amplifiers. Once combined together again, these slightly different signals being modulated by two out-of-phase oscillator signals provided the resulting pitch shifting aspect of this vibrato circuit. If you see six preamp tubes across the back of the amp, you have this 6G12-A version.

The vibrato in these amps is wonderful sounding. It's one of the only circuits utilized in a Fender amp that actually lives up to the term vibrato, which by definition needs to include some form of pitch shifting. This circuit achieves that. The other versions of vibrato used in Fender amps, be it the opto-isolator version or the bias-varying method, are actually forms of tremolo, not vibrato. These circuits do nothing more than vary the amplitude of the circuit. This amp faithfully reproduces the classic sound that defined the Fender Amps of the 50's and 60's.

This is a vintage pre-CBS Fender Brown Face amp with all the mojo of 1962! This amp is CLEAN, CLEAN, CLEAN! ALL ORIGINAL except the speakers which are Jensen Reissue. The pots and transformers all have the '62 date code, even the power cord is original. This beauty has the original light brown vinyl cover and wheat-colored grille cloth and there are no rips or tears to speak of.

This amp is in perfect working order. It's great looking and awesome sounding! Previously owned by one of Saint Louis' own premier headliners, so you know it's going to sound good!