Uniden PC 78 models

April 3, 2021

The Uniden PC 78 model family evolved from the Uniden PC 76 XL of the 1990s. The Uniden PC 78 XL added Dynamic Squelch Control DSC. In 1999 the Uniden PC 78 LTW brought full-time WX alert and backlit controls. In 2003 the Uniden PC 78 Elite added WX alert even if power knob off and backlit panel indicators.

Uniden DSC didn’t work so well because it did not have an adjustable threshold, and like virtually all noise-based auto-squelches can drop out undesirably on overmodulated signals. The PC 78 LTX came out in 2018, and dropped DSC. The Uniden PC 78 LTX also brought a new circuit board using surface-mount components instead of the through-hole construction common to older CB radio designs from the pre-2010 era. Today’s CB radio buyer should steer toward radios having digital noise reduction / DSP, which is a much more effective way to reduce noise and improve audio quality than the old noise-based auto-squelches.