Bidirectional RS485/422 Data Over Fiber Optic Converter Extender Single Core FC | eBay
SMD HLC-2 High Level Converter
2 Channel directional RS485 Data Over Fiber Optic Converter Extender SM FC 20KM | eBay
Ham Radio Magazine 1981
SMD HLC-2 High Level Converter
Contents RIDER V CO., PATERNOSTER HOUSE, LONDON, E.C.4
433mhz /510mhz For Lora Signal Booster Transmitting & Receiving Two-way Power Amplifier Signal Amplification Module W Saw Filter - Iot Accessories - AliExpress
SMD HLC-2 2-Channel Hi to Low Converter with Remote Turn-on