Note
QST, Feb 1969, p. 107.
QST, Aug 1971, p. 116. (GT-550A, after Galaxy's merger with Hy-Gain)
QST, Jan 1972, p. 144.
The GT-550 was a redesign and repackaging of the Galaxy V Mk III transceiver. It made greater use of sold-state devices than its predecessor. SSB PEP input increased to 550 watt. Requires the AC-400 AC power supply or the G-1000 DC power supply.
Accessories include the RF-550 wattmeter, the SC-550 speaker, and the LA-550 kilowatt linear amplifier.
And see QST, Aug 1972, p. 112 for an unspecified rotator system. Also shown in QST, Jan 1972, p. 142, but not seen in QST, Feb 1973, p. 113.
References
Brief description. Electronics World, May 1969, p. 89.
Brief description. Popular Electronics, May 1969, p. 22.