Note
QST, Oct 1969, p. 147.
QST, Aug 1971, p. 111.
QST, Mar 1973, p. 127.
QST, Jul 1975, p. 113. $67.50 (KR20A)
QST, Dec 1976, p. 157.
QST, Feb 1977, p. 108.
KR20 is the same unit but without the paddle assembly. The paddle assembly was available separately (in the same box) as the KR-1. Note: This paddle was also used in the KR40.
Sometimes referred to as the "Ultramatic."