Note
QST, Aug 1946, p. 145.
QST, Jul 1947, p. 4.
Concord catalog 9-47, p. 160.
Radio News, Jan 1949, p. 5.
Lafayette catalog number 89, p 178.
Lafayette-Concord (1949 #949), p. 142.
Allied Radio catalog 1951 (copyright 1950), p. 137.
The SX-43 was listed in an ad (without a photo) in the August 1946 issue of QST (page 145). The ad, for R.C. & L.F. Hall, Inc., may have been a misprint, but it was listed for three months, and the frequency coverage listed was correct. The SX-43's big reveal came nearly a year later, in the July 1947 issue. Oddly, the same same ad also listed the SX-42 (with correct frequency coverage) nearly four months before its official release in December 1946.
The SX-43 is a lower cost version of the SX-42, having virtually the same frequency coverage, but with a simplified tuning mechanism and slightly different mode coverage, and minus a few features.
The receiver uses a double conversion superheterodyne circuit with a frequency coverage from 540 kHz to 108 MHz in seven bands. Band 3A is expanded to cover 20 meters only (14.0 to 14.4 MHz).
Features include a BFO, AVC, a noise limited, mute, standby, two position tone control, and a calibrated bandspread for 80, 40, 20, 10, and 6 meters. Selectivity in four steps. One RF and two IF stages.
Note the gap in coverage between 56 and 86 MHz.
Coverage:
540 kHz to 44 MHz: AM, CW
44 MHz to 56 MHz: AM. CW, FM
86 MHz to 108 MHz: FM only
IF: 455 kHz, (10.7 MHz FM)
Modes: AM, CW, FM
Audio output: 3 watts, 5000 Ω (for use with the R-42 and R-44 speakers)
Power: 120 VAC, 120 watts
Tubes (11 total): (1) 5Y3, (1) 6V6, (1) 6SQ7, (1) 6SG7, (2) 6SH7, (1) 6AL7, (1) 6H6, (1) 6J5, (1) 7F8, (1) 6BA6
References
Review: Electric Radio, Nov 1998
