G6KSN 23/24 cms Stereo Fast Scan Analogue Amateur Television FM TV Transmitter With Intercarrier Sound
Video Input 625 Line PAL composite video at 1V pk/pk (75 Ohms terminated)
Audio Input Line Level for 50KHz FM deviation
2 Audio subcarriers at 6.0 and 6.5 MHz (adjustable).
Video Pre-Emphasis CCIR405
Audio Pre-Emphasis 50uS
Video Modulation FM Positive/Negative going configurable with J7 and J8 (Normally J8 is made).
Transmitter Frequency Range Low (jumper J2 Made) 1240 - 1320 MHz typical
Transmitter Frequency Range High (jumper J1 Made) 1455 - 1530 MHz typical
RF Output Power +17dBm (50mW minimum, 60mW typical at 1250 MHz)
RF Output Power +14dBm (20mW minimum, 25mW typical at 1460 MHz)
Power Supply 9 Volts Regulated at 140mA (Use a 7809 voltage regulator and feed with 12 to 15 volts if required)
Preset potentiometers on board for Audio deviation, Video deviation, Intercarrier Sound injection level and Transmitter output frequency.
The Toko coils may be adjusted for alternative sound subcarrier frequencies if required.
Ideal as a Transmitter for short range communication. Long range possible with a good Yagi antenna and power amplifier.
The off screen photo was taken using my testcard generator feeding the Transmitter and then receiving the signal on a Grundig Analogue Satellite receiver across the room There is no visible patterning on the picture, this is an artifact from taking an off screen photograph.
Picture and sound quality are both excellent.
The oscilloscope images show (a) the purity of the intercarrier sound injection and (b) the off-air video signal fed to a terminated 75 Ohm load.
This will require mounting in a suitable metal box.
In order to use as a more powerful ATV transmitter you will need a power amplifier to raise the 17dBm signal.
The listing is for the Transmitter PCB (built and tested) only. Nothing else is included.
See pictures for the exact condition of the unit.
Be aware that you need a license to operate this equipment into anything other than a dummy load.
Thanks For Looking!