Midway through the 4-Line's run, in 1967, Drake introduced a receiver and transmitter pair meant for the Novice licensee - the 2-C receiver and 2-NT transmitter. The 2-C was an improved receiver based on the 2-B design using a few more solid state devices. Thus, it was a sophisticated design compared to most other receivers targeting Novices. The 2-NT used a crystal oscillator to control its frequency, a requirement of the Novice license at that time (the restriction was later removed by the Federal Communications Commission (FCC)).