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PC Electronics TX70-5 70 User Manual

70 cm atv transmitter

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TX70-5 70 CM ATV TRANSMITTER

The TX70-5 transmitter is designed to provide over 0-5 Watt continuous duty peak envelope

power (sync tip) of video modulated RF in the 70 CM (420-450 MHz) amateur band. 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 TX70-5 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 compan-

ion 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 P. C. Electronics 2522 Paxson Lane Arcadia CA 91007-8537 USA ©2009 1-626-447-4565 Tel: m-th 8am-5:30pm pst & Mary Ann (W6ORG) (WB6YSS) (UTC - 8) Web site: http://www.hamtv.com Email: ATVinfo @ hamtv.com TX70-5 70 CM ATV TRANSMITTER USERS MANUAL The TX70-5 transmitter is designed to provide over 0-5 Watt continuous duty peak envelope power (sync tip) of video modulated RF in the 70 CM (420-450 MHz) amateur band.
Page 2 REAR PANEL: 50 OHM 70 CM ANTENNA. A UG21 type N plug is pro- vided to attatch to low loss .5" size 50Ω coax. Losses at 70 CM are very high in transmission lines. We suggest using the foam filled types (3.5 dB/100') such as Belden 8214, or semi rigid (2.5 dB/100') Belden 9913.
Page 3 LINE AUDIO INPUT. High level line audio usually from the OPERATING NOTES: ATV practices are somewhat different same source as plugged into the companion Video input is from the other bands and modes. Since we must use plugged into this jack using another RCA phono plug shielded directional antennas to make up for the 26 dB higher noise cable.

Tx70-5