Note
Radio News, Jul 1946, p. 85. ("new, improved")
QST, Aug 1946, p. 147.
Receiver designer Karl Pierson worked for Patterson Electric before the war and also partnered in his own company, Pierson-Delane. His first post-war effort was the KP-81 receiver, a 20-tube, single-conversion set that tuned from 0.54-40 MHz in five bands. It used a moving-coil rack for band switching and had both a crystal filter and cascaded transformers for IF selectivity. The KP-81 's power supply was housed in its speaker cabinet.
References
Brief description. Radio News, May 1946, p. 148.
