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what does SVT stand for?

Wikipedia sez:

During the 1960s Ampeg only produced fairly low wattage combo amplifiers, and sales were declining. Concerts were growing larger and bigger amplifiers were needed. Ampeg hired technician and inventor Dan Armstrong to create a new line of high power amps with matching guitars and basses. Armstrong created the Super Valve Technology (SVT) amplifier line in 1969, consisting of the 300 watt SVT, the 120 watt V-4 (or VT-22 for the combo version), the 60 watt V-2 and the 40 watt VT-40. The SVT provided three times the output power of most bass amplifiers on the market, which established SVT as an amplifier for large venue use.
 
Wikipedia sez:

During the 1960s Ampeg only produced fairly low wattage combo amplifiers, and sales were declining. Concerts were growing larger and bigger amplifiers were needed. Ampeg hired technician and inventor Dan Armstrong to create a new line of high power amps with matching guitars and basses. Armstrong created the Super Valve Technology (SVT) amplifier line in 1969, consisting of the 300 watt SVT, the 120 watt V-4 (or VT-22 for the combo version), the 60 watt V-2 and the 40 watt VT-40. The SVT provided three times the output power of most bass amplifiers on the market, which established SVT as an amplifier for large venue use.

Wiki sez we ain't always right.;)

According to Ampeg: The Story Behind the Sound, in 1969 Roger Cox and amp designer Bill Huges with input from Bob Rufkahr and Dan Armstrong created the Super Vacuum Tube amp or simply SVT.:bassist:
 

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