RCA Compact RF Modulator (CRF907A)

RadioShack 15-2526 RF Modulator

VECOAX MINIMOD-2 | HDMI TO COAX MODULATOR to distribute your hdmi video sources to all TVs as HD Channels over existing tv coax cables

PVI VECOAX MICROMOD MS Q Single Channel HD Digital CABLE RF Modulator

E-SDS HDMI to RF Converter Box with Remote Control,RF Modulator Support Zoom Function

Brightlink Matrix Switcher A/V Distribution Systems (Brightlink 8x8 HDMI AV Matrix Set Over Cat6 8 Receivers | Full HD 1080P, 3D, Supports HDCP | WiFi App Control)

ZeeVee HDb2312-NA ZeeVee HDb2312 12 Channel SD Video Encoder/QAM Modulator - Composite/Analog audio

Optoma BC300 3D RF Emitter

Linear 3025 Channel Plus 3025 3-Input Video Distribution System with 5-Volt IR

ZeeVee ZvSync-NA HD Digital Tuner/Decoder QAM