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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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FM RADIO sa FM RADIO ANTENNA sa FM RADIO CONVERTER sa FM RADIO MAINTENANCE & REPAIR sa FM RADIO TRANSMITTER x FREQUENCY MODULATED RADIO xx RADIO Improve your Heath AR-15 or AR-1500 FM receiver and phono preamplifier. Tips on digital readouts for AM/FM tuners. Classic circuitry. Schematic of the black box front end of Dynaco's FM-5 tuner. Classic circuitry. Schematic of the Marantz 10B FM tuner. Kit report on the VSM Audio MPX-2 phase locked look stereo demodulator modification package. Used to replace the standard stereo demodulator in the Dynaco AF-6, Dynaco FM-5 and Scott LT-110 FM tuners. Report on the Hafler DH-330 FM tuner kit which features electronic tuning. Test report on the ADCOM GTP-400 FM tuner/preamp. Report on the Velleman K4500 digital synthesized FM tuner kit. Includes construction tips. Improve Dynaco's FM-5 FM tuner and AF-6 AM/FM tuner by adding IC voltage regulators. Also correct the low-frequency drop in the demodulated signal of the early model FM-5. FM for the new kid on the block. Terminology and the basics of FM and repeater amateur radio operation. Try 10 meter FM. Options available in equipment. Ultra-low-power FM receiver circuit. Two transistor, one IC receiver based upon a super-regenerative circuit. Works well with both wideband and narrowband FM as well as AM. Tuning range is from 88 to 210 MHz. Multi-modulation. Ideas for combining AM and FM modulation into an AM modulated FM carrier that contains both audio channels. Advertising commercial zapper for FM radio. Monitors the incoming signal and reduces output volume according to how much the input resembles a commercial message. FM stereo finder. A $7 booster nets 15 dB gain. VHF receiver tunes from 26 to 162 megacycles without changing coils. This 3-tube receiver has a 5-position switch for selecting bands. FM receiver with a remote control unit for volume and station tuning. A review of the techniques and equipment needed to join the two-meter FM ham band. One-transistor muter (or squelch) for FM receivers. Automatic stereo multiplex demodulator. Design of a transistorized circuit for use in hi-fi tuners to perform automatic switching from mono to stereo. Circuit for adding a sensitive "zero-center" FM tuning meter to a stereo FM receiver. Solid-state locked-oscillator FM limiter/detector for TV sound. Mini-Max, a novel superregenerative receiver, covering the 80- to 175-MHz band. Will receive television, FM, aircraft and police transmissions with just a 2-ft. whip antenna. The theory and physics of radio waves, carrier waves and AM and FM modulation. Investigating FM and Phase modulation at the hobby level. Vintage glass. Schematic of the Scott 800-B AM/FM main receiver chassis and power supply Add a digital dial. Add an accurate, digital-tuning indicator to an inexpensive or antique radio to read out AM and FM received frequencies. CMOS phase-locked loops. Part 2. Practical applications of PLL circuits. Circuits include (1) frequency meter upconverter, (2) frequency-to-voltage converter, (3) frequency synthesis, (4) double sync oscillator, (5) adjustable tone detector, and (6) FM demodulator. Modulation and demodulation, the process used in virtually every type of communications system for transfering information. Basic concepts of AM and FM modulation. Experiments include building modulator and demodulator circuits. Two-meter FM operation. An introduction to the use of repeaters and available equipment. Miniature FM receiver will fit inside a pack of gum. Built around the TDA 7000 20-pin low-profile IC. Requires only a 6" antenna. Tuner specs and what they mean. Examining manufacturers' tuners or the tuner sections of receivers. A 4.5-MHz FM receiving system. This simple system picks up sound from TV receivers and other sources that have 4.5-MHz signals and delivers an amplified output suitable for driving an audio amplifier. Description of the TDA7000 FM receiver IC. Includes circuits for (1) a typical 88-to-108-MHz FM receiver with variable-capacitor tuning and (2) a narrow-band FM receiver circuit. How walls have ears. Using a scanner to eavesdrop on wireless intercoms, baby monitors, and similar low-power FM devices. Stereo S'Lector automatically switches the multiplex adapter into circuit when stereo FM station comes in. Booster will triple strength of FM and TV signals. Transistor FM multiplexer. An automatic switchless stereo adapter and stereo indicator. Interstation "hiss" suppressor for FM tuners. Police special 2. A single-conversion FM communications receiver that tunes the entire 152 - 176 MHz public service band. Battery operated and self-contained in a 7"x5"x3" cabinet. Circuit for an FM pocket receiver. Est. cost: $5. Multiplex stereo decoder circuit for addition to a non-stereo FM receiver. Build a low-cost squelch circuit for receivers without built-in squelch. Add to any sold-state vhf/FM receiver. Understanding updated FM tuner specifications will help you select the best tuner. Simple squelching circuit for stereo FM tuners to eliminate between-station hiss. A new industry standard for FM tuner measurement. Part 1. A new industry standard for FM tuner measurement. Part 2. Circuit for a voltage-tuned FM broadcast-band front end using discrete devices. IC multiplex decoder improves stereo FM performance. Phase-locked-loop circuit upgrades older stereo tuners and receivers. Est. cost: $25. How FM tuners work. Part 1. Basic fundamentals of how they work, the front end and the i-f section. How FM tuners work. Part 2. The detector and modulation/demodulation circuits. Circuit for filtering out interstation hiss on FM receivers. Tune your receiver by the numbers. Add a 4-digit display which indicates AM frequencies to the nearest 1kHz and FM frequencies to the nearest 100 kHz. DC receiver circuit is built around a TDA7000 single-chip FM receiver. Adapt for stereo at one-third the cost. Add a tuning indicator to an FM tuner. How to build a portable multiplexer system, a transmitter unit to connect the amplifier to the existing wiring and a receiver/speaker. How new FM tuner specifications can help you in selecting the right hi-fi components for your needs. What the specs mean. Build an AM/FM frequency display. Part 1. Gives you a digital readout of the frequency on which your receiver is set. It also displays the time of day. Unit is crystal controlled for accuracy. Est. cost: $45. Build an AM/FM frequency display. Part 2. Buyers guide to FM tuners. Understanding specifications so you can choose the right tuner. Commercial zapper for your FM radio. This circuit automatically senses large changes in volume and reduces output accordingly. Works best with stations playing "light" music. Tip on determining when an FM-stereo radio station is broadcasting a commercial (instead of music) and using this information to "kill" the commercial. All-band VHF receiver. Tune police, fire, aircraft, weather, FM, CB, AM, etc. Est. cost: $24. Phono amplifier plays FM tuner. Multiband VHF receiver will tune from 26 to 185 MHz by plugging in one of five coils. Est. cost: $24. | |||||||||
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