Note
QST, Aug 1976, p. 5.
QST, Oct 1977, p. 165.
Disconinued at some pointaand then put back into production.
See QST, Aug 1979, p. 2.
QST, Apr 1981, p. 186.
QST, Jun 1981, p. 141. (close out)
Succeeded by the IC-22U. The same device accept with frequency selection by thumb wheels.