QST, Jun 1956, p. 4.
QST, Jan 1958, p. 104. (L-1001-A)
QST, Jul 1958, p. 162. (L-1001-A, good inside photo)
The L-1001-A was the amplifier section of the L-1000-1, and was made available separately beginning late in 1957. See QST, Jan 1958, page 104, for example.
