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  • Wireless Telephone Bug

    Here’s a neat little project that will allow you to monitor your phone line as soon as your phone is off hook. You can use a regular FM broadcast band radio to monitor the conversation. VN:F [1.6.9_936]please wait…Rating: 8.0/10 (2 votes cast)VN:F [1.6.9_936]Rating: +1 (from 3 votes)

  • FM Telephone Bug

    Here is a simple transmitter that when connected to a phone line, will transmit anything on that line (execpt the dial tone) to any FM radio. The frequency can be tuned from 88 to about 94Mhz and the range is about 200 feet. It is extremely easy to build and is therefore a good, useful […]

  • Transmitter FM 45W with valve

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  • Small Radio Transmitter

    This article contains information about building a small radio transmitter, which has a PCB 1.75″ x 2.5″ (45mm x 68 mm) and has a range of about 30 yards or so. The documentation with the circuit says the freq range is 100-108 MHz, but I have found it to be more like 85-100 MHz. VN:F […]

  • WBFM TX V7

    NOTE – This project is illegal to use or build in many countries. I accept no responsibility what-so-ever for any ilegal use. This circuit is provided solely as an educational project. Now I have got that off my chest, let me get on with the project. VN:F [1.6.9_936]please wait…Rating: 0.0/10 (0 votes cast)VN:F [1.6.9_936]Rating: +1 […]

  • FM Transmitter Bug

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  • AM FM Simultaneous Transmitter Using Digital IC

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  • Medium range transmitter

    This is a medium range transmitter circuit diagram. This is also improved by changing the values of the resistor. VN:F [1.6.9_936]please wait…Rating: 0.0/10 (0 votes cast)VN:F [1.6.9_936]Rating: +1 (from 1 vote)

  • 15W Fm-transmitter

    It was five years ago when I did an attempt to build my first fm-transmitter. It ended in a giant faillure. The only thing it did was interferring with our tv-set. Looking back it was due to the lack of information I had. A schematic was my only help. Now, five years later, I know […]

  • AM Transmitter

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