Telex ST-300
17-Channel Base Transmitter

The St-300 FM Transmitter is designed to provide auditory assistance in both personal and group situations. It operates on the 17 narrow-band channels in the 72-76 MHz band. The base FM transmitter is rack mountable and accepts balanced and unbalanced audio inputs. It runs from a wall plug 12 VAC transformer and includes a detachable telescoping 1/4 wave antenna.

The ST-300 Base Transmitter features 17 user selectable frequencies digitally controlled from the front panel control buttons, a headphone jack with adjustable level for input signal monitoring, and a backlit LCD display that shows Channel, Frequency and Audio Input Level.

On the back of the unit is a balanced XLR-3F as well as an unbalanced 1/4" input.

Front panel controls and LCD display allow the user to select mic, line, and 70 volt input options, attenuate the input levels and change hi/low RF transmit power.

A new feature called Enhanced Dynamic Range (E.D.R.) works with the SR-400 receiver to provide clearer, more dynamic audio.

Audio Input Characteristics XLR-3F Balanced, 1/4 inch unbalanced.
Antenna detachable 1/4 wave telescoping
Modulation FM, +/- 25 KHz deviation
Frequency Response (System) 100 Hz to 10,000 Hz
Automatic Gain Control Range 30 dB
System Signal to Noise 58 dB, > 77 dB with E.D.R.
Preemphasis 100 micro seconds
Maximum Power 80K micro Volt/m @ 3 m (25K micro V/m in Normal)
Power Requirements 13-20 Vdc or 12 Vac; 115Vac 60 Hz @ 300 mA plug-in wallpack power supply
Size H 1-3/4" (4.5 cm) x W 7-1/2" (19.2 cm) x D 5.9" (15 cm)
FCC ID B5DM522