Sixty years ago this month, the August 1960 issue of the British Practical Wireless magazine carried the plans for this handsome five-tube public address amplifier. The guiding principles behind the design were reliability, portability, and economy. It put out 10-12 watts at modest cost and weight. The built-in speaker was said to provide for dance music in a medium size hall, and in the open air, with reliable speakers, speech would be intelligible about 500 yards.