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Part #:

Model: VHF-22A

OEM:

Collins Aerospace

Desc:

VHF Comm
Part Number :


VHF-22A
FEATURES
  • Proline II remote-mounted, multichannel VHF voice transceiver providing AM voice communications in the frequency range from 118.000-135.975 (for -001,-002 units) and up to 136.975 (for -011,-012 units)
  • 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
  • Models available with 720 channels or 760 channels (see table below)
  • Models available with narrow bandwidth intended for operation in areas using 25-kHz channel spacing with or without offset carriers
  • Models available with wide bandwidth that will operate satisfactorily in areas where the received carrier frequency varies as much as 13 kHz from nominal (see table below)
  • Models available reduced level of VHF harmonics in GPS band (see table below)
SPECIFICATIONS
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 135.975 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 NumberVHF Communications Transceiver Description:
622-6152-001 720 channels with narrow selectivity
622-6152-002 720 channels with wide selectivity
622-6152-011 760 channels with narrow selectivity
622-6152-012 760 channels with wide selectivity
622-6152-021 720 channels with narrow selectivity; with reduced VHF harmonics level
622-6152-022 720 channels with wide selectivity; with reduced VHF harmonics level
622-6152-031 760 channels with narrow selectivity; with reduced VHF harmonics level
622-6152-032 760 channels with wide selectivity; with reduced VHF harmonics level

 

622-6152-001
- VHF Comm

NSN: 5895-01-369-5448

Price Condition Status
$800.00 OH OUTRIGHT REQUEST LEAD TIME
622-6152-002
- VHF Comm
Price Condition Status
$950.00 OH OUTRIGHT REQUEST LEAD TIME
622-6152-011
- VHF Comm
Price Condition Status
$850.00 OH OUTRIGHT REQUEST LEAD TIME
622-6152-012
- VHF Comm
Price Condition Status
REQUEST SV OUTRIGHT REQUEST LEAD TIME
622-6152-021
- VHF Comm
Price Condition Status
REQUEST OH OUTRIGHT REQUEST LEAD TIME
622-6152-022
- VHF Comm
Price Condition Status
RFQ RFQ RFQ
622-6152-023
- VHF Comm
Price Condition Status
RFQ RFQ RFQ
622-6152-031
- VHF Comm

NSN: 5821-01-640-9029

Price Condition Status
$1,200.00 SV OUTRIGHT REQUEST LEAD TIME
622-6152-033
- VHF Comm
Price Condition Status
RFQ RFQ RFQ

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

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.

The VHF-22C is only a direct replacement for the VHF-22A 25 kHz comm. The VHF-22C is not a direct replacement for the VHF-20A or VHF-21A radios as they have different mating connector styles. The VHF-22D is a direct replacement for the VHF-22B.

Negotiating the exchange price of a unit only limits the allowable repair cap for the core unit. Southeast Aerospace's exchange transactions are based on the return of economically repairable core unit. Once the core is received and evaluated, the core repair cost incurred by SEA cannot exceed 75% of the original exchange price. That is, it cannot cost SEA more than 75% of the original OH/SV exchange price collected from the customer. Therefore, when and if an SEA exchange price is discounted, there is a risk that additional charges may be assessed once the core is returned and evaluated.

For more information, please refer to these other Exchange FAQs