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59
SPECIFICATIONS
Note: All specifications are guaranteed within the amateur radio band.
General TH-K20A/E TH-K40A/E
Guaranteed range (MHz) TX & RX
144 ~ 148 (K/M)
144 ~ 146 (E)
430 ~ 440
Operation Frequency range
(MHz)
TX
136 ~ 174 (M)
144 ~ 148 (K)
144 ~ 146 (E)
400 ~ 470 (M)
430 ~ 440 (E)
RX 136 ~ 174 400 ~ 470
Mode F3E, F2D
Antenna impedance 50 Ω
Operating temperature range
–20°C ~ +60°C (+4°F ~ +140°F)
–10°C ~ +60°C (+14°F ~ +140°F)
<with KNB-63L/ KNB-65L>
Operating Voltage DC 6.0 ~ 9.0 V (7.4 V nominal)
Frequency stability Within ± 2.5 ppm
Dimensions W x H x D (projections not
included) <with KNB-63L>
54 x 111.7 x 25.3 mm
2.13 x 4.4 x 1.00 in
Weight <with KNB-63L> Approx. 210 g/ 7.4 oz.
Transmitter TH-K20A/E TH-K40A/E
RF output power
<with KNB-63L/ KNB-65L>
High 5.5 W 5 W
Medium 2 W
Low 1 W
Modulation Reactance
Maximum frequency deviation Within ±5 kHz
Spurious emission Less than -60 dB
Modulation distortion Less than 5 % (300 Hz ~ 3 kHz)
Microphone impedance
2 kΩ
Receiver TH-K20A/E TH-K40A/E
Circuit type Double super heterodyne
Intermediate Frequency (IF) 1st IF: 38.85 MHz 2nd IF: 450 kHz
Sensitivity (12 dB SINAD) Less than 0.16 μV Less than 0.18 μV
Squelch sensitivity Less than 0.13 μV
Selectivity
-6 dB More than 10 kHz
-50 dB Less than 28 kHz
Audio output More than 400 mW (8 Ω/ 10 % distortion)
Specifications are subject to change without notice due to advancements in technology.
67


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