Dating fender stratocaster serial number

In late 1960, Fender introduced a completely redesigned model 6G6 Bassman Amp, using the "piggy-back" design, in which the amplifier chassis is housed in a small cabinet, attached by metal clips to a larger separate speaker enclosure.

The P10Q Jensen speakers are more able to manage stronger electrical input power and generate better "clean" output sounds than previous installed P10R Jensen speakers.

The P10R Jensen speakers were shipped within all Fender Bassmen from late 1954 until early 1960.

Many professional music industry analysts have heralded the 1950s Fender 4×10 Bassman amps as the greatest guitar amp ever.

The first 1954 Fender Tweed 5D6 4×10 circuit generated further Tweed Bassman amplifier development through 1960.

The 5E6-A Bassman model was introduced later that year and included some evolutionary improvements.

In July 1957, Fender introduced the model 5F6 Bassman.

The 6G6 model was covered in rough Blonde colored Tolex material with Oxblood colored grill cloth.

It had a single GZ34 rectifier, two 5881/6L6GC power tubes and four 12AX7 preamp tubes.

This model also had four Jensen P10R speakers, but the power supply was redesigned around a single 83 mercury vapor rectifier tube, and a new preamp circuit was introduced that included a three knob tone stack, with separate controls for Treble, Mid and Bass.

The power amp included a "long tailed pair" phase inverter, an innovation that noticeably increased the "headroom" or clean power output capability of the amplifier.

The 5D6 was a major departure from the earlier 5B6 Fender Bassman model.

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