Rockwell-Collins VHF-20A Comm Transceiver XCVR Receiver
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Rockwell-Collins Avionics VHF-20B Comm Transceiver XCVR/RCVR Transmitter/Receiver Radio , P/N 622-1334-002 VHF-20


VHF-20 Features
The VHF-20A Provides AM voice communication in the frequency range from 117.00-135.975 MHz
* Optional bandpasses available of +-8 kHz or +-15 kHz (see table below)
* Solid state transceiver
* Typically used with either CTL-20 digital control or 313N-5/A series analog controls
* Composed of subassemblies that mount on a central frame
* Similar to VHF-20B Comm Transceiver but DOES NOT have extended range to 151.975 MHz



This unit is a P/N 622-1879-002 117.000-135.975 frequency range with +-15 kHz IF bandpass filtering and is compatible with +-15 kHz offset carrier systems

Specifications:
  • Weight: 5.6 lbs.
  • Dimensions: 3.750"W x 3.50"H x 13.9"L
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  • 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
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  • Altitude: 55000 ft. max.
  • Shock: 6 g for 11 ms, operating
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  • Frequency Range: 118.000 to 135.975 MHz
  • Frequency stability: +-0.0015%
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  • Channel Spacing: 25 kHz
  • Frequency control: 2-out-of-5, in accordance w/ ARINC 410
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  • Channel change time: Less than 50 ms
  • Transmit-receive interval: Less than 50 ms
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  • Radiated rfi: Meets RTCA Paper DO-138, DO-109, DO-110
  • RF power output: 20 watts nominal; 16 watts minimum
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  • Output impedence: 52 ohms, unbalanced
  • Harmonic Content: 60 dB down from carrier minimum
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  • Spurious content: 90 dB from carrier minimum
  • Modulation capability: 90% amplitude modulation
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  • Modulator input: Carbon mic input 0.125 V adjustable, 150 ohms
  • Sidetone output: 100 milliwatts into 600 ohms with 90% modulation
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  • Duty cycle: 1-minute transmit; 4-minute receive
  • Noise level: 50 dB below 85% modulation at 1000 Hz
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  • Audio response: 6-dB variation from 300 to 2500 Hz
  • Audio distortion: 15% max, 85% modualtion
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  • Receiver Sensitivity: 6 dB (signal + noise)/noise for 3-uV signal; 30 dB (signal + noise)/noise for 100-uV signal
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  • 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)
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  • AGC range: Maximum 3-dB variation, 5 to 200,000 uV
  • Receiver audio output: 100 mW into 600 ohms, balanced
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  • Receiver audio response: 6-dB variation from 300 to 2500 Hz, 1000-Hz reference
Receiver audio distortion: 7% max, 30% modulated signal

Item is in good physical conditon
Item is untested
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Medical Terms:
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  • The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. If so, do not bid on this item unless you are an authorized purchaser. If the item is subject to FDA regulation, I will verify your status as an authorized purchaser of this item before shipping of the item.
  • The buyer will not hold the seller, or the item's manufacturer responsible for the appropriate or inappropriate use of this device either by the user or a third party. Once purchased, it is the sole responsibility of the purchaser to assume any and all liability from the use of this device.
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