Note
Ham Radio, Mar 1974, p. 81.
Ham Radio, Dec 1974, p. 90 (HT-144B)
QST, Apr 1976, p. 89.
Engineering introduced its 2 meter HT-144 handie-talkie kit in 1974. The entire transceiver was built on one circuit board. Problems plagued the HT-144 and a "B" version was soon released. Improvements in the HT-144B included Improved transmit audio, deviation up to ±6 kHz, crystal sockets, better sensitivity (0.35 uV sensitivity or better), improved squelch threshold (0.25 uV), and an Improved manual.
An improved, sealed battery pack was supplied with the HT-144B. An IC amp replaced three of the four transistors in the original HT-144's audio chain. Crystal sockets were also added. The 4-channel HT's power output was about 2 watts.