This transmitter board will produce a complete NTSC video signal plus a 4.5 Mhz FM sound subcarrier, modulated on a carrier in the 1240-1300 MHz amateur band (23 Centimeters). This UHF signal is far above the normal tuning range of TV sets but can be received on any TV receiver by using a suitable  RF downconverter. A dedicated downconverter outputting on an unused VHF channel (CH3 or CH4) such as our model DCNV-1300 can be used in a receiving setup for these frequencies. This also provides an optimized RF front end and best reception range. The small size (2.50 X 4.00) is comparable to many small PC board cameras and is small enough for R/C applications in which a video link is needed, robotics, or amateur TV. Operation is possible from nominal 11.0 to 14.4 volt power supplies, with minor adjustments in video drive. Lead acid, nicad, or alkaline power packs may be used. Less than 11 or more than 15 volts is not recommended. Power output will be typically from 0.5 to 1 watt PEP over this voltage range. Crystals are supplied for 1277.25 and 1289.25 MHz with space for one other crystal of the operators choice. The transmitter may be operated from about 1.2 to 1.35 GHz (for export only) at possibly reduced power level. The transmitter requires standard NTSC or PAL video. The audio can also be retuned for a 5.5 MHz sound subcarrier used by the PAL system. The video input is standard 1V p-p 75 ohms, negative sync. The physical size and control layout as well as the electrical interfacing requirements matches our 2W single and 3 channel 420-450 MHz models, as well as our 915 MHz model, and the PC board can be considered as a "drop in" replacement for those models. With these two other versions, a three band ATV system can be assembled. Note that this transmitter has not been submitted for type approval and is intended only for AMATEUR USE BY SUITABLY LICENSED AMATEURS.

Specifications are same as ATV12-440 MK2 except for frequency and power output as noted here

NOTE THAT A VALID AMATEUR LICENSE PERMITTING OPERATION AT 1.24-1.30 GHz IS A REQUIREMENT FOR OPERATION OF THIS DEVICE. In the USA this will be a Technician Class license. A Novice Class license will do if the transmitter frequencies are held between 1270 and 1295 MHz, including all sidebands and sound subcarrier. The crystals furnished with the kit are satisfactory for Novice class use. If you can successfully build this kit you should easily be able to meet the technical requirements to pass the required exam.

OPERATION OF THIS DEVICE ON ANY COMMERCIAL TV FREQUENCIES IS ILLEGAL IN THE USA and for other nations, check local laws. It is designed for amateur use by legally licensed amateurs and for no other purposes. It is not suitable for direct TV broadcasting or LPTV use since its output frequency is far outside the tuning range of standard TV receivers, and it has not been submitted for type approval for such use.

The kit can be easily assembled in two to five evenings, depending on experience. There is some small work so suitable small tools should be available. Some experience is assumed, but the average electronic hobbyist will have few if any problems if the layout is carefully followed, leads are kept very short and construction practices appropriate for UHF circuitry are used.

Price $152.00 USD plus Shipping and handling (See Order Form)
PO Box 200, Hartford NY 12838-0200
EMAIL:            Tel 518-854-9280           Internet