Lanced@ SILICON-SECURITY.co.uk
SMALL SOUND TRANSMITTER
A very simple transmitter , with the components shown it can be picked up on any standard FM radio 80-105 MHz [aprox] Range is limited to around the house, Excellent baby monitor, Will work on as low as 3v for small size, but 9v will improve range, build one into a car alarm key fob !!!! WHO WOULD SUSPECT A BUNCH OF KEYS !!!!,
[Please make sure you are not breaking any laws by building or using this transmitter]
TRACKING TRANSMITTER
This transmitter produces short pulses, The output can be picked up on a sensitive receiver, with a directional high gain antenna, Such as a multi element yagi [TV Arial] or a loop antenna, Range can be determined with a signal strength meter,and a bit of experimentation........[C1 controls pulse frq]........[Please make sure you are not breaking any laws by building or using this transmitter]
NO ready made kit available ''CALL BACK AGAIN''VIDEO / TV TRANSMITTER
NO build your own circuit available ''CALL BACK AGAIN''
READY MADE Video Transmitters
This is the actual Spy Camera used in the field by many leading security service agencies, including our very own MI5.:: Camera Specs::
Transmission, 2.4GHz .RF output power, 10mW .Operating Power, DC5-12V .Transmission Range, up to 100m .Weight 20 grams. Omni-directional Antenna .Resolution, 380 horizontal lines.
Angle of view 60 degrees. Includes:
2.4GHz Wireless Ultra Miniature Camera System .Microcam wireless receiver .Superior quality CMOS colour lens .Power adaptors .RCA Cable .Battery pack (4 X AA) .Battery snap (9 volt) .
Full instructions . USEFULL BOOKS YAGI antenna design, More info !
More info !
"Build Your Own Low-Power Transmitters" This book contains 20 low-power (LP) transmitter projects, for the electronics hobbyist and radio experimenter. 
More info !
A complete course in understanding and designing RF circuits Practical design knowhow from a world-class author
A comprehensive introduction to designing and understanding RF circuits 
More info !
Design and construct your own antennas with step-by-step instructions and plans,it covers a wide variety of antennas: high-frequency dipole; vertically polarized HF; multiband and tunable wire; hidden and limited space; directional phased vertical and directional beam VHF/UHF transmitting and receiving;
shortwave reception; microwave; and mobile, marine, and emergency. This state-of-the-art edition includes a new chapter on antenna modeling software and new coverage of small transmitting antennas and receiving loop antennas. 
More info !
easy-to-read text with many detailed illustrations Contains information on cutting-edge receiver equipment,,A reference and guide for anyone interested in electronic communication using radio waves
There is a companion Web site featuring calculation software and spreadsheets.
READY MADE audio transmitter
