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Call: 414-327-1555 Fax : 414-327-0577 Email: indelect@execpc.com Catalog, Quote, Availability. |
PLL Tuned FM Stereo Transmitter (Click
on any photo for larger view)
Try this with your computer to re-transmit Internet radio! This is truly a slick product! The PLL (phase locked loop) tuning means stable broadcasting, which results in big advantages. Being on frequency and drift-free equals much better transmit distance and receive quality. Frequency is "entered-in" on a keypad, and the unit stays exactly on frequency. Transmit to your portable radio! For input use your CD player or tape player or your computer so that you can broadcast programming on the Internet to your portable radio; listen anywhere around the home. Operates on 9 to 12 Volts DC.
NO. 80-055 PLL FM Stereo xmter kit.
PLL Tuned FM-Stereo Transmitter Note that the "top board" is not shown here, just the bottom. The top board contains the digital readout and keypad.
PLL controlled FM Stereo Transmitter
Kit - top of the line. the finest in Stereo transmitters, and latest technology. A two board FM Stereo Transmitter kit with the best possible
features that our 
designers could think of. In addition
to very clean, accurate stereo reproduction, the PLL tuning provides stability
that is simply not available in most transmitters. Unit has an LCD display with
an EEPROM memory to retain frequency setting even if powered down. Listen on
your Walkman, or any stereo FM radio in your home or car.
The top board is the controller, with the keypad switches and LCD readout. The
bottom board is the transmitter, employing an NJM2035
for the stereo generator, buffered tuning from the PLL for quiet performance
and an RF amp stage on the output. The circuit can be tuned in 5K steps, for
fine tuning. You will want to use a very "clean" power supply for this circuit;
batteries (12 volts DC, at least 75mA.) are a perfect source of power. Or, a
well filtered power supply to be sure to eliminate power line hum. This circuit
can broadcast any line-level input, such as a computer sound card, CD player,
tape player etc. far enough to provide excellent reception around an average
house and yard. Instructions for a low cost FM antenna are included. The top
board size is 5 1/2" long and 3.3" in width; the finished unit fits neatly into
a Philmore No PB170 plastic case (which is not in the kit, sold separately).
The unit will function on voltages as low as 9 volts and as high as 14.9 volts;
at the suggested 12 VDC the unit needs up to 75mA supply. While assembly is
easy and straight forward, we suggest the kit only for builders with some experience
in kit building.
No. 80-057 PLL tuned FM stereo Transmitter.
The top board, shown to your right, has the LCD digital readout plus the frequency entry keypad.
FM Stereo Transmitter (Click on any photo for larger view)
This is a circuit that will broadcast CD quality sound to your FM Walkman, home stereo or automobile radio. It produces a strong signal that will generally cover the average home and yard. It is stable enough to use even with digitally tuned FM receivers. Typical uses include broadcasting your own music to a receiver at pool-side or in the garden. Or, you could broadcast from a personal, portable CD player to a car radio that has no CD player. School uses include running a "broadcast station" from another room as a speech class exercise. The unit is powered by a 9V transistor battery, or you could use an AC wall adaptor.
No. 80-060
VARACTOR TUNED FM Transmitter, Wireless
Microphone kit
Best range and most stable 'on-frequency"
performance ever.
(Click on any photo for larger view)
This is the Cadillac of miniature, concealable FM transmitters, and wireless mikes . Transmits in the standard FM radio band; tune to open frequency. Varactor tuning results in stable signal, free from stray capacitance and drifting. Sensitive, picks up conversations from several feet. Powerful operation on a nine volt battery but could use 12V DC if you are going for distance. Easy to build, good for teaching beginners with just a bit of supervision.
No. 80-065 Varactor Tuned FM Transmitter Wireless Mike Kit
3 Volt FM (miniature) Transmitter
The most powerful circuit we’ve seen that operates on such low voltage
(just two AA cells). A range of 100 meters can be expected and given a good
antenna and good conditions, 500 meters is not unusual. Can be operated on up
to about 9 volts. Transmits to the FM radio band. Teaches basics of transmitters.
Microphone is included.
No. 80-070 3-volt FM Wireless
Transmitter.
The Tone-Volume-Balance Control Kit
A serious audio (stereo) circuit; used much like a preamp (eliminates the need
for one); that is, between the audio source and your stereo amplifier. Use with
your amp or with our kit No. 80-088 ten watt stereo amplifier or with the No.
80-050 44-watt stereo amp (etc.). The kit has separate Bass, Treble, Balance
and Volume controls; with loudness contour switch as well. Designed to run on
12 volts DC ((at)35mA), the circuit will work on "clean" DC voltage from 7.5
to 16 volts ("clean" means low ripple or using battery power). You will need
to furnish the power supply and phono connectors and/ or cables.
No. 80-075 The Tone-Volume-Balance Control Kit
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Call: 414-327-1555 Fax : 414-327-0577 Email: indelect@execpc.com Catalog, Quote, Availability. |