38T
Noise Cancellation
- The 38T cancels noise best when held very close to the mouth, and it discriminates against all sounds more than ½-inch away. A position at one side of the mouth is best to minimize popping, hissing and breathing sounds when speaking.
Microphone Gain Adjustment
- The gain is adjustable through an opening in the side of the microphone housing using a small, flat-blade screwdriver. Clockwise rotation of the control increases gain. Adjustment by a qualified avionics technician is recommended, as excessive gain can cause transmitter overload distortion.
FAA TSO Approval
- The 38T microphone is certified for aviation use under FAA TSO C58.
Specifications
Microphone Sensitivity | -45 - -51 dB (re: 1 V / μbar @ 1 kHz, 12 VDC) |
FAA TSO Approvals | C-58 |
Retracted | ~11.5 in (292 mm) |
Specifications |
Extended | ~6 ft. (1.8 m) |
Weight | ~8 oz (227 g) |
Microphone Type | Close Talking Differential, Electret Element |
Mounting | External Diameter Mount |
Frequency Response | 300 Hz – 3 kHz |
Connector Type | PJ-068 or XLR-4-12C |
Warranty | 3 years |
Downloads
Name | Size | Date |
---|---|---|
38T EC Declaration of Conformity | 101KB | Nov 6, 2014 |
38T FAA TSO Approval | 56KB | Nov 6, 2014 |
Name | Language | Size | Date |
---|---|---|---|
38T Technical Data Sheet | EN | 277KB | Nov 6, 2014 |

38T Mic

38T Full

38T Speaker Close
Name | Language | Size | Date |
---|---|---|---|
Maintenance & Overhaul Manual Publication Index | EN | 74KB | Jan 4, 2021 |
Name | Size | Date |
---|---|---|
Headset Cleaning Memo | 84KB | Jun 12, 2020 |