PC Electronics TX70-.1s User Manual

70 cm atv transmitter

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TX70-.1s 70 CM ATV TRANSMITTER

The TX70-.1s transmitter is designed to provide 50 - 100 mW continuous duty peak envelope

power (sync tip) of video modulated RF in the 70 CM (420-450 MHz) amateur band on 4 switch selected

frequencies and to drive a linear amplifier. 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-.1s accepts U.S.A. standard composite video (1 volt pk-pk) from any source such as color or black

and white TV cameras or camcorders, VCRs, or computers 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 the companion TVC-4s downconverter.

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.

P. C. Electronics 2522 Paxson Lane Arcadia CA 91007-8537 USA

1-626-447-4565

Tel:

Web site: http://www.hamtv.com

USERS MANUAL

m-th 8am-5:30pm pst

(UTC - 8)

Email: ATVinfo @ hamtv.com

Tom

& Mary Ann

(W6ORG)

(WB6YSS)

Page 1 47 CFR part 97 of the FCC Rules and Regulations. The TX70-.1s accepts U.S.A. standard composite video (1 volt pk-pk) from any source such as color or black and white TV cameras or camcorders, VCRs, or computers for transmission. Audio from these sources or a low impedance dynamic mic is also transmitted on the 4.5 MHz sound subcarrier.
Page 2: Rear Panel
1535) up to 12' or RG59 for longer runs. When unplugging, only twist clockwise to keep the jack from coming loose. bands are not connected to the TX70-.1s, rather to their own antenna and left on when transmitting on 70cm for full duplex or crossband repeat.
Page 3 ARRL SCM, the same time as color does in a snowy picture - P3 - or pick a night and time to start an ATV net. The TX70-.1s is depending on the TV sets audio IF gain and limiting.
Page 4 DX vs. POWER vs. ANTENNA GAIN. The 100 mW output of the of interest. Technically there is little difference between polarization’s TX70-.1s was chosen to provide an easy low cost entry into the above 300 MHz according to a US Army study. However, below world of ATV, but at the same time give flexibility to all the applica- 300 MHz horizontal is generally better.