Note
QST, Jan 1952, p. 5.
QST, Apr 1952, p. 111.
Allied Radio catalog 1953 (copyright 1952), p. 43.
QST, Mar 1955, p. 7. ("Mobile Littlefone")
Sold for commercial/industrial applications, but easily adaptable for amateur use. Later promoted for civil defense use.
Also see HT-22 and HT-23.
HT-21: 25–50 MHz
HT-22: 150–174 MHz
There were several versions of the low and high band units, as indicated by the three letter code after the model number:
HT-21-LDS – low band, 3/4 watt, dry battery
HT-21-LWS – low band, 3/4 watt, wet battery
HT-21-HWS – low band, 2 watt, wet battery
HT-22-LDS – high band, 1/2 watt, dry battery
HT-22-LWS – high band, 1/2 watt, wet battery
HT-22-HWS – high band, 1 watt, wet battery
References
Technical description. Radio News, Jun 1952, p. 63.
key words:
littlephone