Early Solid-state Models
Fender's first transistor amplifiers were introduced in 1966. At the time they were the company's "flagship" range and aimed to make the tube-based designs obsolete. The amplifiers were naturally given traditional Fender model names, earliest including 'Dual Showman', 'Twin Reverb', and 'Bassman'. Other products in the line were the 'Solid-State Reverb Unit' and the 'Solid-State Public-Address System'. 'Super Reverb', 'Pro Reverb', 'Vibrolux Reverb' and 'Deluxe Reverb' amplifiers followed in 1967.
The amplifiers were mainly designed by Robert "Bob" Rissi, Sawa Jacobson and Paul Spranger, who came up with the novel idea of making a heatsink to operate like a chimney to achieve increased and non-restricted airflow. Paul also designed the distinctive angled chassis and overall cosmetic styling. He was granted patents for both accounts.
In 1969 more transistor amplifiers were introduced, including the 'Zodiac' series and the behemoth 'Super Showman System'. Seth Lover, the legendary designer of the Gibson "P.A.F." pickup, and another former Gibson employee, Richard Chauncey Evans, were hired to help in designing the latter series, which consisted of an 'SS-1000' preamplifier head and 'XFL-1000' and 'XFL-2000' self-powered speaker cabinets. The head featured three cascadable channels, a "Dimension V" oil can delay effect, reverb, vibrato, and a fuzz. The powered cabinets could switch between normal and "tube-emulated" operation.
Zodiac-series amplifiers consisted of 'Capricorn', 'Scorpio', 'Taurus' and 'Libra' models. Aside from being covered with fake alligator skin, they were cosmetically very similar to Super Showman. However, these were smaller combo amplifiers with fewer features and aimed for the lower end of the market.
Fender's early transistor amplifiers had an extensive marketing campaign but in the end they proved to be a major disaster. Many key executives of Fender had resigned after the CBS purchase and quality control of the PCB-constructed amps was rather sloppy during the times. Reputedly many of the early solid-state amplifiers failed simply because employees didn't bother to clean up the soldering machines or attach the semiconductors properly to their heat sinks. The infancy of semiconductor technology also meant that many designs failed due to thermal runaway caused by insufficient cooling or lack of knowledge concerning "safe" power ratings of transistors. The cascaded effects from all this created a very poor reputation for the transistor products and the entire solid-state line was discontinued already in 1971. Additionally the experience also scared Fender away from solid-state amplifier technology for the next ten years.
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