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A linear amplifier is an electronic circuit whose output is proportional to its input, but capable of delivering more power into a load. The term usually refers to a type of radio-frequency (RF) power amplifier , some of which have output power measured in kilowatts , and are used in amateur radio .
The second amplifier released was the Phase Linear 400 with 200 watts per channel. It shared the same distinctive brushed aluminum, dual VU meters front panel style as the 700. It retailed for just under $500. [1] The next product was the Phase Linear 4000 Series Auto-correlation Pre-Amplifier introduced in 1973 and manufactured through 1978.
Bob Carver used "distortion pots" to introduce amplifier characteristics, fine-tuned to null-out any sound differences. His modified amplifier sound was so similar, Stereophile Magazine editors could not tell the difference between his amplifier and one costing more than $6,000. [5] This amplifier was marketed as the M1.0t for about $400.00.
Improved models of the two transceivers were periodically introduced well into the 1970s along with accessories, including a remote VFO (for separate control of receiver and transmitter frequency) and the Mark-I and Mark-II linear amplifiers. Magazine ad circa 1970s featuring Swan 600T/600R
Soundcraftsmen was a manufacturer of high-end audio stereo components located in Santa Ana, California, United States.. The company was founded in 1961 by Ralph Yeomans, a concessionaire in Fedco (a discount membership store chain in southern California, until the chain closed in 1999).
The company was founded as SWR Engineering, Inc. by its namesake, Steve W. Rabe. Rabe was known for his engineering work at Acoustic Control Corporation.After extensive research with top Los Angeles studio bassists, SWR released its first commercial product in 1984, the PB-200 hybrid tube/solid-state bass guitar amplifier.