The TX70-5s transmitter is designed to provide >4Watts peak envelope power (sync tip) of video modulated RF in the 70 CM (420-450 MHz) amateur band on any of 4 switch selected frequencies – 439.25, 434.0, 427.25 and 426.25 MHz – with a duty cycle of 15 minutes on and 5 off. Longer key down periods can be done at reduced power or by blowing air on the enclosure. Any licensed Technician class or higher Radio Amateur may operate this transmitter in accordance with 47 CFR part 97 of the US FCC Rules and Regulations.
The TX70-5s accepts U.S.A. standard composite video (1 volt pk-pk) from any source such as color or black and white cameras with video output or camcorders, VCR’s, or DVR’s for transmission. Audio from these sources or a low impedance dynamic mic is also transmitted on the 4.5 MHz sound subcarrier. Transmit / receive power and antenna switching is provided for a companion high sensitivity TVC-4s down-converter. A cable ready TV may also be used to receive: 439.25 MHz equals cable channel 60, 434 can be received on cable channel 59, and 427.25 or 426.25 received on cable channel 58.