|
 |
 |
 |
|
 |
|
 |
|
|
Last Updated
03/31/2019
Sitemap
|
|||||||||
Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
|||||||||
|
FM RADIO TRANSMITTER xx FM RADIO xx WIRELESS MICROPHONE A novel VHF power amplifier. Design concepts for a 1 kilowatt quarter-wave stripline FM amplifier. Schematic for a "one chip" micro-power 6 meter FM transmitter. Simple circuit which converts an FM radio into an FM transmitter. Wireless FM microphone broadcasts 100 feet. Est. cost: $14 (kit). Simple FM transmitter (wireless microphone) operates in the 80-130 MHz range and is powered by a 9-volt battery. Build an FM broadcaster with enough power to transmit a high-quality stereo signal to any FM receiver within 50 feet. Est. cost: $20 (plus crystal). Wireless camcorder microphone (a short-range, low-power FM transmitter). Est. cost: $15. Simple FM transmitter (wireless microphone) circuit. The dirty little FM snooper. An FM transmitter that consists of a simple condenser microphone which is used to modulate the output of a small, one-stage, FM transmitter. The transmitter radiates a continuous wave whose frequency is altered in sympathy with the sound waves striking the microphone. Tracking transmitter. Build a transmitter that outputs a series of short, tone-modulated pulses which can be picked up by a portable FM receiver. Use it to locate your car in a parking lot, monitor the movement of children or pets, etc. Est. cost: $29 (kit). Build a 49-MHz FM transmitter and learn some of the principles behind wireless communications. Use it with any compatible receiver (cordless telephone, walkie-talkie, baby monitor, ...). FM stereo transmitter can be built to transmit anywhere in the standard 88-108 MHz FM-broadcast band. Est. cost: $35-$50 (kit). License free FM transmitter operates up to 600 feet. FM guitar broadcaster. A battery-powered, short-range FM transmitter and contact microphone which can be mounted inside a guitar. Use any FM receiver as an amplifier. Est. cost: $10. Wireless tape-recording system uses an FM radio, an FM wireless mike, a tape recorder and the control described in this article. Controller turns recorder on when mike is on and off when mike is off. Build this FM stereo broadcaster (transmitter) with a range of 50 feet. Est. cost: $20 (kit). Build this handi-talkie. E-Comm frequency-modulated (FM) transceiver features small size, rechargeable power pack, 0.3-microvolt sensitivity, and continuous output of 3 watts rms into a 50-ohm antenna. Features a usable carrier frequency range of 27 MHz to 32 MHZ (depending on crystal and alignment). Est. cost: $168 (kit). Wireless camcorder microphone. A short-range, low-power FM transmitter. Est. cost: $15 (kit). Wireless FM guitar transmitter. Est. cost: $40 (kit). Build this FM-stereo transmitter to extend your home entertainment system to other rooms without wires. Uses phase-locked loop techniques and analog op-amps to produce a clean, stable, broadcast-quality FM-stereo signal over a range of 76-108 MHz. Est. cost: $75 (kit). An overview of developments in low-power FM transmitters. Includes an inside look at the RadioShack 12-2051 FM Stereo Transmitter's circuit. Low-power FM transmitters. An overview of what is available in legal "clandestine" radio transmitters. Circuit for FM wireless mike is usable up to 50 feet. FM wireless mike uses a commercial FM wireless microphone module. TV wireless FM mike. Use a wireless microphone to broadcast your TV sound to your FM stereo system, earphones, etc. Dirty Little FM Snooper. Wireless microphone consists of a simple condenser microphone which is used to modulate the output of a small, one-stage FM transmitter. Experimenter's license-free FM radio transmitter can broadcast a clear signal 50 feet or more to an FM receiver. Est. cost: $15. Low-power broadcast-band transmitter circuits. Typical circuits plus a review of the legal requirements for such devices. FM wireless microphone is battery powered and has a usable range of 50 ft. or less. Telephone transmitter. Connected in series with a phone line, this device "steals" power from the phone line and transmits both sides of a conversation to an FM radio. Est. cost: $10 (kit). FM wireless microphone is a pocket-size combination microphone and transistorized transmitter. FM wireless microphone uses a linear integrated circuit. Other circuits for audio amplifier, mixer shown. FM wireless microphone circuit uses a standard rectifier diode as the modulator. Connect extension speakers to your hi-fi system without wires. A wireless transmitter sends music to loudspeakers over your existing ac power lines. Operating in FM mode, it results in good quality sound without much noise. Frequency response is 30-to-17,000-Hz. Est. cost: $20 for transmitter; $29 for receiver. Circuits for a wireless microphone for both AM and FM broadcast band. Cord buster. Eliminate the need for headphone umbilical cords that keep you tethered to your stereo system by constructing this short-range FM transmitter. Wireless mike consists of an electret-microphone element feeding its output signal to a miniature FM transmitter in the 88 to 95 MHz range. Wireless tape player. Use a wireless FM microphone to broadcast a portable tape player through the FM radio in your automobile. Eliminates the need to install an expensive tape player. Build a miniature tracking transmitter. This circuit emits a series of short, tone-modulated pulses that can be picked up on an FM receiver. Est. cost: $29 (kit). Build a 49-MHz FM transmitter capable of 16 mW (milliwatts) of RF power. Build your own FM stereo transmitter with a range up to 1/4 mile. Est. cost: $35 (kit). Simple FM transmitter circuit powered by a 12-volt DC plug-in supply. Build a telephone transmitter. Listen-in on telephone conversations on any FM radio. Transmits both sides of a conversation to an FM radio tuned to between 90 and 95 MHz. Est. cost: $10 (kit). Circuit for an FM wireless microphone with a range of 50- to 150-feet within the 88- to 108-MHz commercial band. Experimenting with small FM transmitters. Several circuits provided. Wireless FM microphone will work up to, but never over, 200 feet. Est. cost: $9. How to use a wireless FM mike for remote tape recordings. Wireless stereo link. FM transmitter broadcasts a stereo signal up to 100-ft. in a typical residential environment. The signal is received on an unused FM channel. Est. cost: $60. Part 1. Construction. Wireless stereo link. Part 2. Checkout and operation. Wireless FM microphone conforms to FCC regulations. Est. cost: $14. Circuit for a micropower stereo FM wireless broadcaster that works off a single AA battery. Simple FM transmitter is powered by a 9-volt battery and used with an antenna no longer than 12". Tips on designing an FM wireless transmitter that will work with newer FM receivers (which demand that the transmitted signal be precisely locked into one of the FM broadcast channels). "Tie-Spy" a miniature, short-range FM transmitter and microphone that appears to be a diamond-studded tie pin. Est. cost: $7. | |||||||||
Copyright © by Norman Lathrop Enterprises. All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means (electronic, mechanical, print photocopying, recording or otherwise) without the prior expressed permission of Norman Lathrop Enterprises, except as permitted by law. |
|||||||||