General Frequency Range ............................................................ 150~174MHz Number of channels ......................................................... Max. 8 (TK-260G) Max. 128 (TK-270G) Number of groups ............................................................ Max. 128 (TK-270G) Channel Spacing .............................................................. 25kHz, 30kHz (Wide) 12.5kHz, 15kHz (Narrow) PLL Step .......................................................................... 2.5kHz, 5kHz, 6.25kHz, 7.5kHz Operating Voltage ............................................................ 7.5 VDC Battery Life ....................................................................... More than 8 hours at 5 watts (5-5-90 duty cycle with KNB-15A battery) Operating Temperature renge ......................................... -30°C to +60°C (-22 °F to +140 °F) Dimensions and Weight With KNB-14 (7.2V 600mAh battery) ............................. 58 (2-5/16) W x 135 (5-5/16) H x 32 (1-1/4) D mm (in) 400g (0.88lbs) With KNB-15A (7.2V 1100mAh battery) ......................... 58 (2-5/16) W x 135 (5-5/16) H x 35 (1-3/8) D mm (in) 440g (0.97lbs) Receiver (Measurements made per EIA standard EIA-RS316B) Sensitivity EIA 12dB SINAD ........................................................... 0.25mV (Wide)/0.28mV (Narrow) Selectivity ......................................................................... 70dB (Wide)/65dB (Narrow) Intermodulation ................................................................ 65dB (Wide)/60dB (Narrow) Spurious responce ........................................................... 65dB Audio Power Output ......................................................... 500mW Frequency Stability .......................................................... ±3ppm Channel Frequency Spread ............................................. 24MHz Transmitter (Measurements made per EIA standard EIA-RS 316B) RF Power output .............................................................. 5W/1W Spurious and Harmonics .................................................. 70dB Modulation ....................................................................... 16KfF3E (Wide)/11KfF3E (Narrow) FM Noise .......................................................................... -45dB (Wide)/-43dB (Narrow) Audio Distortion ................................................................ Less than 5% Frequency Stability .......................................................... ±3ppm Channel Frequency Spread ............................................. 24MHz