Pro 3 crystal controlled stereo encoder coder module for FM transmitters

Description

Pro 3 crystal controlled stereo coder module for FM transmitters
Compatible with ANY of our mono transmitters
Low Cost – High Performance
LED Indication for stereo/mono mode
Low noise – Low distortion
Uses standard phono sockets for Left/Right Inputs and MPX Output
Fuse protected
Left/Right channel 50uS or 75uS Pre-emphasis selectable
Crystal controlled 19kHz Pilot Tone
Pro 3 series Stereo Encoder. Using an improved pcb and layout, it provides excellent stereo performance and is the perfect companion for many mono transmitters, it will
provide full Stereo FM with most quality FM transmitters. Dual Pre-emphasis (user adjustable) makes it compatible for any country whilst a fuse ‘crowbar’ circuit makes the unit damage-proof from reverse polarity connection. Dual leds indicate stereo or mono output and stereo/mono jumper is fitted, to enable easy testing.
Left and Right ident circuitry is fitted to the PRO III Stereo Coder and this ensures that Left and Right Channels can never reverse to give an inverted stereo image. This feature alone puts it way ahead of low cost stereo coders from other manufacturers.
Connection of this kit is very simple; the unit accepts the standard stereo Left and Right line-out from any stereo source and gives out a single multiplex signal, which can be fed directly into the input of a MPX enabled mono .
Power Supply Required (not included): regulated (11-15v) supply, 13.8v dc recommended.
PLEASE NOTE
This coder is new old stock and has never been used. I am unable to test it so it’s sold as seen, but there’s no reason to believe that it’s isn’t OK.
What’s included
1 x
Pro 3 crystal controlled stereo coder module
1 x Pack of jumpers
Construction and user / setup guide
Pro 3 series Stereo Encoder. Using an improved pcb and layout, it provides excellent stereo performance and is the perfect companion for many mono transmitters, it will  provide full Stereo FM with most quality FM transmitters. Dual Pre-emphasis (user adjustable) makes it compatible for any country whilst a fuse ‘crowbar’ circuit makes the unit damage-proof from reverse polarity connection. Dual leds indicate stereo or mono output and stereo/mono jumper is fitted, to enable easy testing. Left and Right ident circuitry is fitted to the PRO III Stereo Coder and this ensures that Left and Right Channels can never reverse to give an inverted stereo image. This feature alone puts it way ahead of low cost stereo coders from other manufacturers. Connection of this kit is very simple; the unit acc