Mini FM transmitter - 3 Volt FM Transmitter (bug)

The most powerful circuit we've seen that operates on such low voltage (just two AA batteries). A range of 150 to 200ft can be expected and, given a good antenna and FM receiver, over 1 mile can be expected. An external power supply can be used up to 9 volts. Transmits to the FM radio band. Teaches basics of transmitters. Microphone is included. Specifications: L: 1-3/4" W: 3/4" H: 1/2". Requires 2 AA batteries (holder included, not shown in picture). Transmission frequency is user selectable. Transmission can be listened to on any FM radio.

Mini FM transmitter - with Microphone Kit CK111

This powerful little FM transmitter comes with a sensitive microphone and will transmit to any FM radio up to 100 feet. This FM transmitter runs on four "AA" size batteries has an excellent frequency stability. The transmitting frequency is adjustable from approximately 88 to 98MHz. A sensitive microphone and an LED indicator are also incorporated right on the board. It only consumes 10mA and the kit includes battery holder.

FM Radio Transmitter Kit FM10A with case

This is a stereo transmitter! Just connect a cassette deck, CD player, MP3 player or mixer panel to the FM-10A's line level inputs and you're on-the-air with a school, dorm, camp, home, church or neighborhood FM station. Tunable anywhere in standard FM band... 88 to 108 MHz Operates on 5 to 15V DC Standard line level inputs with RCA phono jacks Settable pre-emphasis 50 or 75 Sec for use anywhere in the world Adjustable input sensitivity and stereo balance Easy to build, low cost transmitter FCC Approved RF Output: 10mW Range: up to 200 feet The FM-10A has plenty of power and our manual goes into great detail outlining all the aspects of antennas, transmitting range and the FCC rules and regulations. You'll be amazed at the exceptional audio quality of the FM-10A, in fact, your station will sound better than most stations on the dial! This is because in their quest for ever higher ratings, FM broadcasters crank up the average level of their modulating signal in order to sound 'louder'. This produces noticeably more muddy and constrained sound than your signal! Whether you set up a wireless extension of your home stereo, dorm radio station, or simply transmit radio calls (2 meters on the left, 440 on the right - stereo, remember?) you'll find lots of fun and satisfying uses for this most popular kit. Runs on internal 9V battery or external power from 5 to 15V DC. Optional kits are Small antenna and Case (size 5"w x 1-1/2"h x 5-1/4"d), 12V AC adapter. The kit includes Transmitter, Case, and small Antenna. The kit can be ordered assembled (like the picture). You must choose a frequency between these 3 ranges: 88-94, 91-100, or 95-108Mhz (We need to know which range when we assemble the unit, it can always be changed later by switching a capacitor).

MP3 / Walkman FM Mono Transmitter with Power Supply (Fully Assembled) (Special Deal)

This mono FM transmitter can be connected to any type of audio source with a headphone or line output such as a computer, laptop, portable MP3 Player, Walkman or Discman in order to transmit the sound to any FM receiver. A stereo cable is included. The circuit can be powered with an adapter or using a car cigarette lighter adapter. A DC jack is incorporated right on the board for easy connection. Frequency: 88 - 108 MHz. Typical range: 100 feet. Supply voltage: 9 - 12V DC @ 50mA. Recommended power supply: Kit CK341V12 / UK341V12.

Digital FM Transmitter For Your iPod, MP3 Player, Radio and More

Finding the right way to connect your radio, MP3 player, or even a computer, to a stereo system can be time consuming and frustrating. This Digital FM Transmitter lets you send a signal from any audio source to any radio easily, and without wires. Use it to send a satellite radio signal, MP3 audio, and more, to nearby radios around your home or workplace, even in your car. The FM Transmitter is simple to use. Just plug the Transmitter into the headphone jack or line out of any audio device and set the frequency of choice (88-108 MHz). You?re now free to listen to streaming audio from your computer in any room, not just where your computer is. Listen to portable devices without the need for headphones. It has an approximate line-of-sight range of 30'. Walls and metal objects will reduce this range.

Mini FM Transmitter - FM Transmitter Kit CK108

Designed with a 5-pin inductor to provide a wide transmitting range (88 - 108 MHz) and an excellent frequency stability. Requires 4 x "AA" size batteries. Comes with complete instructions, microphone, battery holder, and etched, silk-screened circuit board. It can be ordered assembled. Measures 5cm x 3.5cm.

FM30-WT Synthesized FM Stereo Digital Transmitter (Wired & Tested, Fully Assembled)

Our RF engineers took it as a challenge and designed not one, but TWO transmitters! The FM30 is designed using through-hole technology and components and is available only as a do-it-yourself kit, with a 25mW output very similar to our FM25 series. Then they redesigned their brand-new design using surface mount technology (SMT) for a very special factory assembled and tested FM35WT version, with 1W output for our export market! Both are designed around an RF tight vinyl clad metal enclosure for noise free and interference free operation. All settings are done without taking the cover off! Enter the setup mode from the front panel and step through the menu to make all of your adjustments. A two line LCD display shows you all the settings! In addition to the LCD display, a front panel LED indicates the PLL lock so you know you are transmitting. Besides frequency selection, front panel control and display gives you 256 steps of audio volume (left and right combined) as well as RF output power. A separate balance setting compensates for left/right differences in audio level.

In addition to settings, the LCD display shows you "Quality of Signal" to help you set your levels for optimum sound quality. And of course, all settings are stored in the non-volatile memory for future use! The design includes EMI filters on line level audio and power inputs, and a state of the art microstrip PCB inductor to reduce microphonics for the ultimate in alignment free operation. RF output is through a professional well shielded rear panel BNC connector for a perfect antenna match. Standard RCA connectors are used for left and right line level audio inputs. Both the FM30 and FM35WT operate on a 13.8 to 16VDC and include a 15VDC plug in power supply. The stylish metal case measures 5.55"W x 6.45"D x 1.5"H and is a perfect match with your computer to broadcast your music files throughout your house. If you're looking for a super performer without all the features of our FM100 series transmitters, the new FM30 is for you! The FM35WT can only be shipped outside the USA, or within the US if accompanied by a signed statement that the unit will be exported. (Note: The end user is responsible for complying with all FCC rules & regulations within the US, or any regulations of their respective governing body). Can be ordered assembled! (Wired and tested-parts soldered to the board, requires small amount of assembly).

Synthesized FM Stereo Transmitter Kit, Case, Adapter & Whip Antenna FM25B

Now you can use your iPod, PDA, MP3, CD, TV, Cassette Player, PC, or Laptop to listen to your favorite tunes through any FM stereo receiver.Need professional quality features but can't justify the cost of a comercial FM exciter? The FM25B is the answer! A cut above the rest, the FM25B features a PIC microprocessor for easy frequency programming without the need for look-up tables or complicated formulas! The transmit frequency is easily set using DIP switches, no need for tuning coils or "tweaking" to work with todays digital receivers. Frequency drift is a thing of the past with PLL control making your signal rock solid all the time - just like commercial stations. The FM25B's real claim to fame however is the use of the latest cutting edge stereo generator on the market. The audio quality is excellent with amazingly good stereo separation to keep even the pickiest audiophiles happy! Connections are as good as they get; use the provided cable to interface with the line output of any CD player, tape deck, computer or mike mixer. Just build it, plug it in, and you're on the air! Foreign buyers will appreciate the high power output capability of the FM25B; many Caribbean folks use a single FM25B to cover the whole island! New and improved with clean and hum-free running on either 12VDC or 110VAC with the supplied transformer. Comes complete with case set, telescopic whip antenna, 120VAC power adapter, 1/8" Stereo to RCA patch cable and of course the world famous Ramsey assembly instructions. You'll be on the air before you know it! All New Design! Transmit on any station from 88 to 108 MHz with no frequency drift! Professional quality for transmitting TV sound at exercise clubs Great for transmitting messages for realtors, state fairs, drive-ins, etc. Transmit music / MP3s from your home computer to your stereo Transmit mp3 players/walkmans/portable CD players to your Car Stereo The ideal campus or school radio station Microprocessor controlled No annoying hum - even better stereo separation than the original! New design features Line In and Loop Out 1/8" Stereo jacks! New version features F style antenna output Whip antenna is 33 1/4 inches long Case size 5"w x 1 1/2"h x 5 1/4"d. This product has a shipping weight of 1.50 pounds. RANGE: 1/16 mile or more R-TM100 antenna and R-FM-25 RANGE: 1/8 mile but better coverage of FM band The major difference between the R-FM10A and the R-FM25 is that the R-FM25 is stable and it isn't sensitive to temperature (R-FM10A will fluctuate a little if exposed to temperature changes) Can be ordered assembled! (Wired and tested-parts already soldered to the board, you must screw in the whip antenna).

Synthesized FM Stereo Transmitter, Case, Adapter & Whip Antenna (Wired & Tested, Fully Assembled)

Now you can use your iPod, PDA, MP3, CD, TV, Cassette Player, PC, or Laptop to listen to your favorite tunes through any FM stereo receiver. Need professional quality features but can't justify the cost of a comercial FM exciter? The FM25B is the answer! A cut above the rest, the FM25B features a PIC microprocessor for easy frequency programming without the need for look-up tables or complicated formulas! The transmit frequency is easily set using DIP switches, no need for tuning coils or "tweaking" to work with todays digital receivers. Frequency drift is a thing of the past with PLL control making your signal rock solid all the time - just like commercial stations. The FM25B's real claim to fame however is the use of the latest cutting edge stereo generator on the market.

The audio quality is excellent with amazingly good stereo separation to keep even the pickiest audiophiles happy! Connections are as good as they get; use the provided cable to interface with the line output of any CD player, tape deck, computer or mike mixer. Just build it, plug it in, and you're on the air! Foreign buyers will appreciate the high power output capability of the FM25B; many Caribbean folks use a single FM25B to cover the whole island! New and improved with clean and hum-free running on either 12VDC or 110VAC with the supplied transformer. Comes complete with case set, telescopic whip antenna, 120VAC power adapter, 1/8" Stereo to RCA patch cable and of course the world famous Ramsey assembly instructions. You'll be on the air before you know it!

MP3 Hi-Fi Stereo FM Transmitter (Fully Assembled)

Transmit MP3s or Internet radio stations from your computer or laptop to anywhere in the house with this stereo FM transmitter. The circuit can also be connected to any other type of audio source with a headphone or line output such as for example a portable MP3 player, Walkman or Discman. Another great application is to connect the circuit to your portable MP3 Player and listen to the music while in the car using your car's FM radio. The transmitter includes everything you need, including a stereo cable with plug and two stereo audio jacks for connection to your computer and to your existing speakers. The circuit can be powered with any standard 9V DC / 50mA adapter. Frequenecy: 88 - 100 MHz. Typical range: 100 feet.

HI-FI Stereo FM Transmitter - CK222

Here it is! The transmitter you need to send that beautiful music or favorite TV program out to the pool or all over the house and yard or business office. Connect it to your stereo or TV and listen to the music or program with an FM radio, FM portable radio, etc. Transmits in true stereo. You will have your own FM radio station for your home or office. Comes with easy to follow assembly instructions, battery holder and RCA inpur jacks. Can be ordered assembled. The transmission range is 150ft. It also has adjustable frequency from 88 to 98 MHz and input sensitivity from 50 mV to 1V. Please note the sound quality for this product is Med to High. If you need High quality sound with up to 300ft of range, our most popular transmitter is the R-FM25B Transmitter.

FM30 Synthesized FM Stereo Digital Transmitter Soldering Kit

Our RF engineers took it as a challenge and designed not one, but TWO transmitters! The FM30 is designed using through-hole technology and components and is available only as a do-it-yourself kit, with a 25mW output very similar to our FM25 series. Then they redesigned their brand-new design using surface mount technology (SMT) for a very special factory assembled and tested FM35WT version, with 1W output for our export market! Both are designed around an RF tight vinyl clad metal enclosure for noise free and interference free operation. All settings are done without taking the cover off! Enter the setup mode from the front panel and step through the menu to make all of your adjustments. A two line LCD display shows you all the settings! In addition to the LCD display, a front panel LED indicates the PLL lock so you know you are transmitting. Besides frequency selection, front panel control and display gives you 256 steps of audio volume (left and right combined) as well as RF output power.

A separate balance setting compensates for left/right differences in audio level. In addition to settings, the LCD display shows you "Quality of Signal" to help you set your levels for optimum sound quality. And of course, all settings are stored in the non-volatile memory for future use! The design includes EMI filters on line level audio and power inputs, and a state of the art microstrip PCB inductor to reduce microphonics for the ultimate in alignment free operation. RF output is through a professional well shielded rear panel BNC connector for a perfect antenna match. Standard RCA connectors are used for left and right line level audio inputs. Both the FM30 and FM35WT operate on a 13.8 to 16VDC and include a 15VDC plug in power supply. The stylish metal case measures 5.55"W x 6.45"D x 1.5"H and is a perfect match with your computer to broadcast your music files throughout your house. If you're looking for a super performer without all the features of our FM100 series transmitters, the new FM30 is for you! The FM35WT can only be shipped outside the USA, or within the US if accompanied by a signed statement that the unit will be exported. (Note: The end user is responsible for complying with all FCC rules & regulations within the US, or any regulations of their respective governing body). Can be ordered assembled! (Wired and tested-parts soldered to the board, requires small amount of assembly). We have the FM30 and the assembled FM30WT available now.

Professional AM Transmitter Kit

Run your own AM radio station, be the latest talk-show host or top 40 DJ. Ramsey AM radio transmitters operate in the standard AM broadcast band and are easily set to any clear channel in your area. These units are designed very similar to actual commercial radio transmitters, so you'll learn how the big boys operate and use their transmitters. Our AM-25, pro version, fully synthesized transmitter features easy frequency setting DIP switches for stable, no-drift frequency control, while being jumper settable for higher power output where regulations allow. No FCC license is required, expected range is up to 1/4 mile depending upon antenna and conditions

AM Radio Transmitter Kit w/Case

The kit tunes entire 550 to 1600 KHz AM band, operates on 9 to 12 VDC and has standard line level inputs with RCA phono jacks with 100 mW output. Range up to 1/4 mile under optimum conditions. Run your own AM radio station, be the latest talk-show host or top 40 DJ. Ramsey AM radio transmitters operate in the standard AM broadcast band and are easily set to any clear channel in your area. These units are designed very similar to actual commercial radio transmitters, so you'll learn how the 'big boys' operate and use their transmitters. The entry-level R-AM-1 uses a tunable transmit oscillator and runs the maximum 100 milliwatts of power. No FCC license is required, expected range is up to 1/4 mile depending upon antenna and conditions. Transmitters accept standard line-level inputs from tape decks, CD players or mike mixers, and run on 12 volts DC. You'll find plenty of uses for these handy little transmitters, from sending radio calls throughout the house to playing games with dedicated Rush Limbaugh listeners. Our R-AM-1 has an available matching case and knob set for a finished, professional look. Experiment with the fun of AM radio broadcasting.

Phone transmitter - FM Transmitter Kit

Listen to those 'private' calls! This is a very popular kit, and you know why. It transmits both sides of the conversation of a telephone call to any FM radio. Comes with all the necessary quick connections to make hook-up fast. No batteries needed!! It takes its power from the telephone line. 100 foot range even through walls. Build one today and let the fun begin! Can be ordered assembled. Measures 2.5cm x 4.5cm.

FM Telephone Transmitter (Kit)

This kit's miniature transmitter attaches in series to your telephone line, transmits the conversation 3/4 of a mile and more to an FM receiver. Tune to a clear spot in the FM band of your radio. Completely parasitic i.e. uses the power from the telephone line and needs no battery. The circuit might be used to share or record conversations, but not intended for illegal use. It uses phone line for antenna. Some features are transmission frequency is user selectable, trasmission can be listened to on any FM radio. It also includes alligator clips for easy connection to phone line.

Mini FM transmitter - TV FM Sound Transmitter Kit

This is great for listening to TV at the volume you need while not disturbing others. It transmits the TV audio to any FM radio and you can have earphones on listening at any volume level you may need. Great for people who are hard of hearing. Just connect it to the TV speaker output. Comes with complete instructions and all parts necessary to build it including drilled and etched circuit board. Requires 4 AA size batteries. Can be ordered assembled.

Mini FM transmitter - TV, CD Player, Walkman - FM Transmitter Kit - CK165

This is a mono FM transmitter that is specially designed to be connected directly to the headphone output of your Walkman or any other audio source with a headphone jack. It includes an stereo input circuit which will mix the left and right stereo channels into a single mono signal. The input is equipped with inductors that will match completely with the headphone output and prevents any possible interference noise. It is tunable on the entire FM commercial band (88 to108 MHz) and is very stable in frequency. This has transmission range of 100ft and consumes 10mA and includes all necessary parts and cables for quick hookup. If you want to transmit in stereo, try CK222 Transmitter which also can be ordered assembled and can transmit up to 100ft. If you want to transmit sound from your computer(MP3's or internet radio stations) in high quality stereo sound for a distance up to 300ft (listen out in the yard/garage), order the R-FM25B Transmitter.

Video Transmitter Cube, Wired and Tested (Special Deal)

Perfect video transmission from a transmitter you can hide under a quarter and only as thick as a stack of four pennies - check out the size compared with a penny! Transmits color or B&W with fantastic quality -almost like a direct wire connection to any TV tuned to cable channel 59. Crystal controlled for no frequency drift with performance that equals law enforcement models that cost hundreds more! Basic 20 mW model transmits up to 300?. Units run on 9 volts and hook-up easily to most any CCD camera module. Any of our camera modules have been tested to mate perfectly with the Cubes and work great with solid, trouble-free operation! Fully assembled and tested - just hook-up power and you?re on-the-air with a killer system!

40 Meter Transmitter Kit w/Case (Includes 7.040 MHz XTAL)

These nifty little CW transmitters are practical and economical take-along rigs for trips, camping, teaching or just amazing yourself with just what a watt will do! With exceptional manual of over 20 pages, the detailed step-by-step instructions guide you to a perfectly operating finished transmitter. The rigs use a standard crystal that is connected into a VCXO circuit - which means that you can tune around the crystal's frequency by up to 20 KHz - thus giving you stable crystal control while still being able to tune around! A front panel switch lets you choose between two crystals, we include one, you can add another of your choice. A built-in T-R switch allows break-in operation. Of course, these transmitters interface perfectly with our QRP Mini-rig receivers and our CMOS CW keyer! And for the real ham, there's plenty of room inside the custom case for your own circuit modifications and experiments, these little rigs are often the heart of many QRP operator?s stations. Modify till-the-cows-come-home, or just use em as they are - these little rigs pack a lot of performance into an economical package. Runs on 12 VDC at 200 mA.

20 Meter Transmitter Kit w/Case (Includes 14.060 MHz XTAL)

These nifty little CW transmitters are practical and economical take-along rigs for trips, camping, teaching or just amazing yourself with just what a watt will do! With exceptional manual of over 20 pages, the detailed step-by-step instructions guide you to a perfectly operating finished transmitter. The rigs use a standard crystal that is connected into a VCXO circuit - which means that you can tune around the crystal's frequency by up to 20 KHz - thus giving you stable crystal control while still being able to tune around! A front panel switch lets you choose between two crystals, we include one, you can add another of your choice. A built-in T-R switch allows break-in operation. Of course, these transmitters interface perfectly with our QRP Mini-rig receivers and our CMOS CW keyer! And for the real ham, there's plenty of room inside the custom case for your own circuit modifications and experiments, these little rigs are often the heart of many QRP operator's stations. Modify till-the-cows-come-home, or just use em as they are - these little rigs pack a lot of performance into an economical package. Runs on 12 VDC at 200 mA.

Mini FM transmitter - Wireless Microphone Kit - Fully Assembled

This miniature FM transmitter can transmit your voice to any FM receiver with excellent frequency stability and adjustable transmitting frequency (88 - 95MHz).It operates with only one 1.5V battery and incorporates a sensitive microphone mounted right on the board. Due to its small size you will find many applications for it.

AM/FM Radio Kit/Trainer

This kit includes an assembly, lesson and theory of operation manual. The actual assembly is broken into simple sections. Each section should be completely tested before moving on. This reduces difficult trouble-shooting associated with many similar kits. The kit includes a practical hi-tech blue PC board with the schematic printed on the surface, a battery, and solder. The manual is easy to understand, no previous knowledge of electronics is necessary. This radio kit PC board has been designed so that no cabinet is necessary. A special bracket provides the necessary support to use the radio in any location, displaying the work achievement of the student.