ATV12-915  1.5W 3 CH 900 MHz ATV XMTR

This transmitter board will produce a complete NTSC video signal plus a 4.5 MHz FM sound subcarrier, modulated on a UHF carrier in the 902-928 MHz amateur band (33 centimeters). This UHF signal is above the normal tuning range of a TV receiver but can be received on any TV receiver fitted with an RF downconverter capable of tuning the 902-928 MHz Amateur band. A dedicated downconverter outputting on an unused VHF channel (CH3 or CH4) such as our model DCNV-900 would 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, amateur TV, and remote sensing. 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 1.5 to 2 watts PEP over this voltage range. Crystals are supplied for 910.25 and 923.25 MHz with a space for one other crystal of the operators choice. With the proper crystal, the transmitter can be operated up to 940 MHz (export only) at reduced power level. The transmitter requires standard NTSC or PAL video. The audio can also be retuned for a 5.5 or 6.0 MHz sound subcarrier used by the PAL system. The video input is standard 1V p-p 75 ohms negative sync. The physical size is the same as the 2W single and 3 channel 420-450 MHz models. Note that this transmitter has not been submitted for type approval and is intended for AMATEUR USE ONLY by suitably licensed amateurs.

NOTE THAT A VALID AMATEUR LICENSE PERMITTING OPERATION AT 902-928 MHz IS A REQUIREMENT FOR OPERATION OF THIS DEVICE. In the USA this will be a Technician Class (code free) license. If you can build this kit you should easily be able to pass the required exam.

OPERATION OF THIS DEVICE ON COMMERCIAL TV FREQUENCIES IS ILLEGAL IN THE USA and for other nations, check local laws. This transmitter is designed for amateur use by legally licensed amateurs and for no other purposes.

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. Neat workmanship is a must in this or any other RF device operating at near microwave frequencies. In addition, some familiarity with RF circuitry operating at UHF is helpful.

Price $149.00 USD plus Shipping and handling (See Order Form)
PO Box 200, Hartford NY 12838-0200
EMAIL:            Tel 518-854-9280           Internet