Part #:

Model: VHF-22B


Collins Aerospace


VHF Comm Transceiver

Part Number :

  • Proline II remote-mounted, multichannel VHF voice transceiver providing AM voice communications in the frequency range from 118.000-136.975 and 118.000-151.975 MHz (see versions below)
  • Can be used with Proline II CTL-22 control
  • Accept either 2-out-of-5 parallel or RS-422A serial digital tuning data from frequency control unit
  • Narrow bandwidth intended for operation in areas using 25-kHz channel spacing with or without offset carriers
  • Models available reduced level of VHF harmonics in GPS band for GPS system compatibility (see table below)


Weight: 5.6 lbs. Dimensions: 3.750"W x 3.50"H x 13.9"L
Related documents: DO-138, Env Category AD/A/JNG/AAAEXXXXX; TSO C37b and C38b, class 1, FCC rules and regulations, parts 15 and 87 Temperature: -65 to +131 C
Altitude: 55000 ft. max. Shock: 6 g for 11 ms, operating
Frequency Range: 117.000 to 136.975 or 151.975 MHz* Frequency stability: +-0.0015%
Channel Spacing: 25 kHz Frequency control: 2-out-of-5, in accordance w/ ARINC 410
Channel change time: Less than 50 ms Transmit-receive interval: Less than 50 ms
Radiated rfi: Meets RTCA Paper DO-138, DO-109, DO-110 RF power output: 20 watts nominal; 16 watts minimum
Output impedance: 52 ohms, unbalanced Harmonic Content: 60 dB down from carrier minimum
Spurious content: 90 dB from carrier minimum Modulation capability: 90% amplitude modulation
Modulator input: Carbon mic input 0.125 V adjustable, 150 ohms Sidetone output: 100 milliwatts into 600 ohms with 90% modulation
Duty cycle: 1-minute transmit; 4-minute receive Noise level: 50 dB below 85% modulation at 1000 Hz
Audio response: 6-dB variation from 300 to 2500 Hz Audio distortion: 15% max, 85% modualtion
Receiver Sensitivity: 6 dB (signal + noise)/noise for 3-uV signal; 30 dB (signal + noise)/noise for 100-uV signal Receiver Selectivity: 6 db= +-8 kHz min, 60 db= +-17 kHz max (for -001 unit); 6db= +-15 Khz min, 60 dB= +-35 Khz min (for -002 unit)
AGC range: Maximum 3-dB variation, 5 to 200,000 uV Receiver audio output: 100 mW into 600 ohms, balanced
Receiver audio response: 6-dB variation from 300 to 2500 Hz, 1000-Hz reference Receiver audio distortion: 7% max, 30% modulated signal
Part Number VHF Communications Transceiver Description:
622-6153-001 With 118.000-151.975 frequency range
622-6153-002 With 118.000-136.975 frequency range
622-6153-021 With 118.000-151.975 frequency range; with reduced VHF harmonics level
622-6153-022 With 118.000-136.975 frequency range; with reduced VHF harmonics level


- VHF Comm

NSN: 5821-21-900-7148

Price Condition Status
- VHF Comm

NSN: 5820-01-423-9200

Price Condition Status
- VHF Comm
Price Condition Status
- VHF Comm
Price Condition Status
- VHF Comm
Price Condition Status

Click on a question below to see the answer. If you have a question about this model that is not answered below, please contact

This does not pertain to the comm selector channel spacing.

With the evolution and growth of airborne travel and the necessity for more usable frequencies in the VHF communications spectrum, the "channel" spacing became smaller. To avoid interference between channels the bandwidth of the RF stages was decreased from 50khz to 25khz. In doing so, another problem was introduced. If the ground transmitter or the air to air transmitter was not capable of tighter frequency tolerances, it was possible the 25khz RF selectivity would not allow the receive signal to pass and the aircraft crew could miss critical voice communications.

Due to the presence of older, outdated equipment in some countries, some manufacturers (namely Bendix/King and Collins) produced VHF comm radios with the 50khz receiver selectivity. With the recent mandates and technological advancements in Europe and South America, the requirements for the 50khz versions has diminished. If an operator were to use a 50khz version radio in the position of a 25khz, they would potentially have channel crossover and or an increase in background noise.