Falcon P135

PYE P135 Falcon Radio Telephone

The P135 Falcon Technical Manual provides the following summarized data:

Operation: A3 single or two-frequency simplex amplitude modulation. ​

Frequency Bands: ​

• P135L (Low Band): 81–88 MHz ​
• P135M (Mid Band): 94–108 MHz ​
• P135C (Aero Band): 118–136 MHz ​
• P135H (High Band): 151–156 MHz ​

Channel Spacing: ​

• P135L, P135M: 12 KHz ​
• P135C, P135H: 25 KHz ​

Switching Bandwidth: ​

• P135LC: ±1.5 MHz from tune frequency (Transmitter and Receiver) ​
• P135M/H: Transmitter -1 + 2 MHz, Receiver ±1.5 MHz from tune frequency ​

Channels: Single channel standard, up to six channels available. ​

Operating Temperature Range: -10°C to +50°C ambient. ​

Power Supply: 13.5V nominal DC, negative earth. ​

Current Consumption: ​

Receiver: 150 mA approx. ​

Transmitter: 3A approx. ​

Aerial Impedance: 50 ohms nominal. ​

Receiver Specifications:

• Sensitivity: Produces over 3 watts of audio with less than 30% modulation at 1 kHz for a -107dBm signal input. ​ SINAD ratio is 16dB for -107dBm input (18dB typical). ​
• Signal-to-Noise Ratio (S/N): Greater than 45dB at -67dBm input. ​

Audio Output:

• 2 watts with an 8-ohm speaker. ​
• 3 watts with a 3-ohm speaker. ​

Image Rejection: 75dB. ​

Blocking: Less than 3dB reduction in S/N ratio with an interfering signal of -23dBm at 150 kHz from the tuned frequency. ​

Selectivity: Adjacent channel rejection of 90dB. ​

Mute: Electronically adjustable to less than -113dBm (0.5 uV p.d. ​).

Automatic Gain Control (A.G.C.): 3dB change in audio output power for an input change from -107dBm to -21dBm. ​

Transmitter Specifications:

Power Output:

• 15W   P135L
• 12W   P135M
• 10W   P135C
• 10W P135H

Spurious Output: Less than 2.5uW

Modulation Response: Within +0 - 3dBrelative to 1kHz from 400 Hz to 2.5 kHz.

Duty Cycle: Continuous transmit at 50°C, 50 Ohms load and normal supply voltage. 

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