Note
CQ, May 1963, p. 79.
QST, Apr 1964, p. 162.
Parks Electronics of Beaverton, Oregon was run by K7AAD. He also published VHF'er Magazine. The company made pre-amps and converters for VHF and UHF. The 50-1 was a 6 meter converter and could be configured for a number of IF outputs. Its 117 VAC power supply was built in. The 50-1 could be tuned to cover a 1.5 MHz bandwidth.