P. C. Electronics 2522 Paxson Lane Arcadia CA 91007-8537 USA
©2013
Tel:
1-626-447-4565
m-th 8am-5:30pm pst
(UTC - 8)
Tom
(W6ORG)
& Mary Ann
(WB6YSS)
Web site: http://www.hamtv.com Email: ATVinfo @ hamtv.com
TX70-5s 70 CM ATV TRANSMITTER
USERS MANUAL
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 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 sensitivitty
TVC-4s downconverter. 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.
PLEASE read through this manual before plugging in an cables and attempting operation. Each
connector and control is described here to enable your proper hookup and operation. Also the unique
video practices associated with ATV and the 70 CM band are described. More information on ATV can
be found on our Application Notes web page at www.hamtv.com.
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Summary of Contents for TX70-5s
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