Note
QST, Mar 1957, p. 109.
QST, Jul 1957, p. 111.
EE-3A
QST. Feb 1958, p. 109.
QST. Apr 1959, p. 133.
The EE-3A is visually identical to the EE-3 except that the control to the left of the paddle, formerly labeled "CLOSE KEY" with ON and OFF functions, is now labeled with functions CAL, AUTO, and MAN.
The EE-3A is billed as new and improved, but specific changes are not stated.