Note
The Alinco DR-135 is a rugged, monoband FM mobile transceiver designed specifically for the 2 meter amateur radio band. Part of Alinco's popular monoband mobile series, it shares its compact chassis, user interface, and layout with its sibling rigs (220 MHz DR-235 and 70-centimeter DR-435).
There are two versions of the unit:
– DR-135T: The original standard North American market release.
– DR-135MkIII: The updated iteration featuring minor component updates, improved frequency stability, and optimized firmware while retaining the exact same exterior controls and layout.
Specifications
– Frequency Range: :
TX: 144 – 147.995 MHz (FM)
RX: 118 – 135.995 MHz (AM Air Band) / 136 – 173.995 MHz (FM)
– Operating Modes: 16K0F3E (Wide FM) / 8K50F3E (Narrow FM), F1 (9600bps packet)$^1$ / F2 (1200bps packet)$^1$ / 10F3 (Digital Voice)$^1$, A3E (AM Mode RX Only, DR-135T)
– Channel Steps: 5, 8.33, 10, 12.5, 15, 20, 25, 30, 50 kHz
– Memory Channels: 100 channels + 1 quick recall channel (CALL)
– Antenna Impedance: 50 ohms unbalanced
– Frequency Stability: ± 2.5 ppm (TCXO)
– Usable Temperature Range: -10°C to +60°C (+14°F to +140°F)
– RF Power Output:
High: Approx. 50 Watts
Mid: Approx. 20 Watts
Low: Approx. 5 Watts
– Modulation System: Variable reactance frequency modulation
– Spurious Emissions: Less than -60 dB
– Maximum Frequency Deviation: ± 5 kHz (Wide FM) / ± 2.5 kHz (Narrow FM)
– Microphone Impedance: 2 kΩ
– Receive System: Double-conversion superheterodyne
– Sensitivity (12dB SINAD): Less than -12.0 dB (0.25 uV or better)
– Intermediate Frequencies: 1st IF: 21.7 MHz, 2nd IF: 450 kHz
Selectivity:
Wide FM: -6 dB at 12 kHz or more / -60 dB at 28 kHz or less
Narrow FM: -6 dB at 6 kHz or more / -60 dB at 16 kHz or less
– Audio Output Power: More than 2.0 Watts (at 8 $\Omega$, 10% THD)
Power Requirement: 13.8V DC ± 15% (Negative Ground)
Current Drain:
Transmit (High Power): Approx. 11.0 A
Receive (Squelched): Approx. 0.4 A
