Telex 66T & 66TRA Dynamic Microphone
Telex 66T Dynamic Hand Microphone
General Description
Telex 66T Dynamic Hand Microphone - is a noise–cancelling aircraft communication microphone. It consists of dynamic microphone cartridge, transistor amplifier, and push–to–talk switch in a rugged, black plastic case. A hanger bracket and mounting hardware are provided with the microphone.
TEL–66T has a straight PJ–068 plug.
TEL–66TRA is identical to the TEL–66T, except that it has a molded right–angled plug.
Models TEL–66T and TEL–66TRA are approved for aircraft use under Federal Aviation Agency TSO C–58.
Noise Cancellation
The 66T microphone provides excellent noise cancellation and speech intelligibility in moderate noise environments. The microphone discriminates against all sounds more than 1/2″ away.
Microphone
The microphone is gain adjustable through an opening in the back of the microphone using a small, flat–blade screwdriver. The microphone is supplied with an adhesive label which may be placed over this opening after adjustment to prevent tampering.
Versions Available
The model 66TRA is also available which features a molded right–angle plug. All other aspects of the microphone are the same as the 66T.
FAA TSO Approval
The 66T and 66TRA microphones are approved for aviation use under FAA TSO C58.
| Frequency Response | 100–500 Hz |
| Sensitivity | –48 dB re: 1V ubar at 1 kHz 12 Vdc supply, 150 ohm load |
| Impedance | 50–600 ohms |
| Supply Voltage | 8–30 Vdc |
| Current Requirements | 15mA at 12 Volts 100 Ω load 30mA at 24 Volts 100 Ω load |
| Weight | 9 oz. (255 g) |
| 9 oz. (255 g) | Microphone and relay circuits normally open |
| Cord | 3 conductor coil cord 5″ (1.5 m) extended length |
| Plug Type | TEL–66T – PJ–068 TEL–66TRA – Molded right angle (PJ–068 equiv) |
| FAA Approval | TSO–C58 |
