Part #:

Model: 346B-3

Collins Aerospace - Audio Control
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Part Number :


346B-3
FEATURES
  • Provides control and amplification functions for aircraft audio system
  • Can control as many as 14 receivers and 6 transmitters or 8 receivers and 6 transceivers
  • Version available that has additional transceiver capability (see table below)
  • Each transceiver and receiver input can be separately switched to phone channel, speaker channel, or off
  • Speaker channel can be used for passenger address system, external wheel well speaker system, or aircraft interphone system
  • Version available with externally controlled sidetone volume control (see table below)
  • Housed in 1/4 ATR short low case
  • External cooling not required, holes in case provided for ARINC cooling
  • Can be controlled using 387C-4 Audio Control

 

SPECIFICATIONS
Inputs: (-001,003 units) nine receiver (two of nine receiver inputs are ADF), three transceiver, mike, and interphone inputs with provisions for adding tow more receiver switches and converting three receiver inputs to transceiver inputs Inputs: (-002 unit) eight receiver (two of eight receiver inputs are ADF), six transceiver, mike, and interphone inputs
Inputs Signals: Communications and ADF receivers: 5.0V VOR receivers: 7.9 volts LOC receivers: 4.8 volts MB receivers: 3.4 volts DME: 3.4 volts Mic: 0.1 volt, nominal Outputs: Speakers, headphone, and interphone handsets
Output Impedance: Speaker channel: 4 or 16 ohms Phone channel: 600 ohms Output Level: Speaker channel: 10 watts, nominal Phone channel: 100mW, nominal
Crosstalk: at least 50-dB isolation between inputs Compression: not more than 3dB rise in output for 20dB rise in input
Size: 1/4 ATR short low Weight: 3.5 lbs.
Power Drain: Phone channel: 250 mA at 27.5 VDC Speaker channel: 350 mA at 27.5 VDC (1.2A at voice peaks) Service Interphone: Three handsets loads per unit, 600 ohm phone; carbon of transistorized dynamic mic
Part NumberAudio Control Center Description:
522-3763-001 Standard version
522-3763-002 Same as -001 but with additional transceiver capability
522-3763-003 Same as -001 but with external sidetone control

 

522-3763-001
- Audio Control

NSN: 5895-01-013-0719

Price Condition Delivery
CALL OR RFQ CALL OR RFQ CALL OR RFQ

SEA Repair Capabilities: Yes

522-3763-002
- Audio Control

NSN: 5821-01-008-7445

Price Condition Delivery
CALL OR RFQ CALL OR RFQ CALL OR RFQ

SEA Repair Capabilities: Yes

522-3763-003
- Audio Control
Price Condition Delivery
CALL OR RFQ CALL OR RFQ CALL OR RFQ

SEA Repair Capabilities: Yes

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

Southeast Aerospace exchanges are based on the return of an undamaged, economically repairable core unit with identical part number as the unit shipped to the customer. An "economically repairable" core is defined as one where the cost to repair/overhaul (or Repair Cap) does not exceed 80% of the original SV/OH exchange price billed. Should the Repair Cap exceed 80%, the customer will be billed the additional amount. In the event this amount exceeds the Outright Price for the unit, the customer would only be billed the difference between the Outright Price and SV/OH Exchange Price with the core returned as-is to the customer.

Here is an example of such a transaction:

$1000 Exchange Price charged to customer
$1000 x .8 = $800 Maximum Allowable core repair charge or Repair Cap

$2000 Cost to repair core unit
- $800 Less Core repair cap
---------
$1200 Additional billing amount.

2200.00 Total Cost of transaction

Please Note:
SEA offers exchange on new items as well. However, repair cap as indicated above is still based on SV/OH exchange price.