Note
Radio, Apr 1938, p. 89.
10A, for 110 VAC, $99.50
10X, for 6 VDC, 99.50
10Z, for 110 VAC or 6 VDC, $105.75
KAAR Engineering of Palo Alto, California made a handful of ham products. Among them was the 10-series AM and CW transmitter. Its power output was 15 watts on 160-10 meters. The 10-series featured band switching, internal power supplies, and an antenna coupler.