Selectone ST-200A Two Tone Decoder (Modifiable to be Burst Tone Decoder)  "NOS"

Description

Selectone ST-200A Two Tone Decoder.
Condition is
"New Old Stock"
These units can be changed to an ST-120 or ST200B by changing a few components values.
This model ST-120, ST-200A and ST-200B TONE DECODERS are all constructed on a common small PCB.
Minor component loading differences on the PCB characterizes the DECODER for any one of the three products. The ST-120 decodes audible “Burst Tone” or “Single Tone” formats used in tone controlled repeater systems and other selective calling applications. The ST-200A and ST-200B decode Two-Tone Sequential Tone signals. The ST-200A is intended for compatibility fast Two-Tone formats similar to Reach. The
ST-200B provides compatibility with slower formats similar to G.E. Type 99, and Motorola Quick Call II.
Upon receipt of a tone signaling sequence, the decoder will provide a latched, a momentary, and a call lamp output to a unmute a receiver, key a transmitter, momentarily sound a horn or alarm, or perform other remote control functions. Each decoder is continuously tunable to any tone frequency within the specified frequency range. Special formats and applications can be accomodated by changes in the component values listed on the PCB Optional Component Chart.
Installation instructions with schematic and PCB layout are in the package with the PCB.
packing and shipping via USPS First Class.