PC Electronics TX33-.1s User Manual

70 cm atv transmitter

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TX33-.1s 70 CM ATV TRANSMITTER

The TX33-.1s transmitter is designed to provide 50-100 milliwatts peak envelope power (sync tip)

of video modulated RF in the 33 CM (902-928 MHz) amateur band on any of 5 switch selected frequencies

- 910.25, 911.25, 913.25, 919.25 and 923.25 MHz. For higher power, a Downeast Miicrowave 3340PA

linear amplifier can be added.

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 TX33-.1s 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-9s downconverter connected to a TV on channel 3 may be used to receive:

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 33 CM band are described. More information on ATV can

be found on our Application Notes web page at www.hamtv.com.

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 TX33-.1s 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.
Page 2: Rear Panel
XMIT / REC switch is in REC and open when in XMIT. 2 AMP FUSE INSIDE. The TX33-.1s itself draws less than.5 amp in transmit, and .1 amp plus external downconverter in POWER INPUT JACK. A 4 pin plug 2 ft cable is provided for receive - A 1.0 amp 3AG fuse should handle both.
Page 3: Front Panel
928 MHz ATV downconverter. Downconverters for other It is independent of the line audio level. Speak directly into bands are not connected to the TX33-.1s, but rather to their the microphone at the normal operating distance. Increase own antenna and left on when transmitting on 33cm for full the level to the point where the red XMIT light winks off, and duplex or crossband repeat.
Page 4 ARRL SCM, connected to a good 50 Ohm dummy load or low vswr or pick a night and time to start an ATV net. The TX33-.1s is antenna (less than 10% reflected).