For nearly a decade we’ve been the leader in hobbyist
FM radio transmitters. We told our engineers we
wanted a new technology transmitter that would provide FM100
series quality without the advanced mixer features. They 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 25m W output very similar to our FM25
series. Then the engineers 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 only market!
All settings can be changed 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 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 non-volatile memory for future use!
Both the FM30 and FM35WT operate on 13. 8 to 16VDC and include a 15VDC plug-in power supply. The stylish
black metal case measures 5. 55"W x 6. 45"D x 1.5"H. (Note: After assembly of this do-it-yourself hobby kit, the user
is responsible for complying with all FCC rules & regulations within the US, or any regulations of their respective governing body. FM35BWT is for export use and can only be shipped to locations outside the continental US or valid APO/FPO
addresses or valid customs brokers for end delivery outside the continental US.)
✔ PLL synthesized for drift free operation
✔ Front panel digital control and display of all set
tings and parameters!
✔ Professional metal case for noise-free operation
✔ EMI filtering on audio and power inputs
✔ Super audio quality, rivals commercial broadcasts
✔ Available in domestic kit or factory assembled
FM30B Digital FM Stereo Transmitter Kit, 0-25m W, Black
FM35BWT Digital FM Stereo Transmitter, Assembled, 0-1W, Black (Export ONLY)
Digital Controlled FM Stereo Transmitters
LED Animated Santa
This animated Santa and reindeer display has been our most
popular holiday display for years!
It contains a whopping 126 dazzling colored LEDs which make it a great holiday sign
that is guaranteed to draw attention!
LED Christmas Tree
Electronic Christmas tree features 134
bright colored LEDs in the shape of a gor-
geous holiday Christmas tree. Includes 18
random flashing blinking “candles” on the
PC board! Runs on a 9V battery or external
9-12VDC power supply.
MK117 LED Christmas Tree Kit
LED Animated Holiday Bell
This PC board holiday bell is animated
to simulate a bell swinging back and
forth! 84 bright colored LEDs will dazzle you with holiday cheer! Includes
an on/off switch. Runs on 9V.
MK122 LED Animated Bell Kit
3D LED Christmas Tree
Not your average LED display! 4 branch sec-
tions give this tree a true 3D look! 16 red
LEDs light it up with yellow LED’s for you to
customize your tree! The base of the tree is
actually the 9V battery acting as a self support-
ing base! Now that’s pretty neat!
MK130 3D LED Christmas Tree Kit
Electrocardiogram ECG Heart Monitor
Use the ECG1C to astound your physician with your knowledge of ECG/EKG systems.
Enjoy learning about the inner workings of the heart while, at the same time, covering the
stage-by-stage electronic circuit theory used in the kit to monitor it. The documentation with
the ECG1C covers everything from the circuit description of the kit to the circuit description of
the heart! Multiple “beat” indicators include a bright front panel LED that flashes with the
actions of the heart along with an adjustable level audio speaker output that supports both
mono and stereo hook-ups. In addition, a monitor output is provided to connect to any standard oscilloscope to
view the traditional style ECG/EKG waveforms just like you see on ER... or in the ER! 10 hospital grade re-usable
probe patches are included together with the matching custom case set shown. Safe 9V battery operation.
ECG1C Electrocardiogram Heart Monitor Kit With Case & Patches $44.95
ECG1WT Electrocardiogram Heart Monitor, Factory Assembled & Tested $89.95
ECGP10 Electrocardiogram Re-Usable Probe Patches, 10-Pack $7.95
✔ Visible and audible display of your heart rhythm!
✔ Bright LED “Beat” indicator for easy viewing!
✔ Re-usable hospital grade sensors included!
✔ Monitor output for professional scope display
✔ Simple and safe 9V battery operation
SMT LED Christmas Tree
Build this subminiature Christmas tree and
learn SMT at the same time. Small enough
to wear as a badge or pendant! Extra
SMT parts are included so you can’t go
wrong! Runs on Li-Ion cell.
MK142 SMT LED Christmas Tree Kit
SMT LED Smiley Face
This is a great attention grabber and also
teaches you the basics of SMT construc-
tion! Perfect to wear through the holiday
season or to hang on your tree as an atten-
tion getting ornament! Extra parts included!
Runs on Li-Ion cell.
MK141 SMT LED Smiley Kit Kit
Digital Voice Changer
This voice changer kit is a riot! Just
like the expensive units you hear the
DJ’s use, it changes your voice with a multitude of
effects! You can sound just like a robot, you can even
ad vibrato to your voice! 1.5W speaker output plus a
line level output! Runs on a standard 9V battery.
MK171 Voice Changer Kit $14.95
Steam Engine & Whistle
Simulates the sound of a vintage steam
engine locomotive and whistle! Also pro-
vides variable “engine speed” as well as
volume, and at the touch of a button the
steam whistle blows! Includes speaker.
Runs on a standard 9V battery.
MK134 Steam Engine & Whistle Kit
LED Traffic Signal
Not exactly a holiday theme, a real attention
getter for this time of the season! Impress your
friends with this neat 4-way traffic signal!
Operates just like a standard signal, and features
adjustable delay. Red, yellow, and green LEDs are
used just like the real thing! Runs on 9V battery.
MK131 LED Traffic Signal Kit $7.95
Liquid Level Controller
Not just an alarm, but gives you a
LED display of low, middle, or high
levels! You can also set it to sound
an alarm at the high or low condition. Provides a 2A 240VAC rated
relay output. Runs on 12-14VAC or 16-18VDC.
K2639 Liquid Level Controller Kit $23.95
Is Always Fun!
✔ Build It!
✔ Learn It!
✔ Achieve It!
✔ Enjoy It!
Laser Trip Senser Alarm
LTS1 Laser Trip Sensor Alarm Kit $29.95
True laser protects over 500
yards! At last within the
reach of the hobbyist, this neat kit uses a standard
laser pointer (included) to provide both audible and
visual alert of a broken path. 5A relay makes it simple
to interface! Breakaway board to separate sections.
LED Switcher Blinkey
Wait, an LED that runs on 3VDC run-
ning on 1.5VDC? Learn power supply
switching and end up with a super
bright Telux LED blinking at 140 kHz!
Great to light up your ornaments! Runs on a single
standard AA battery (not included).
LSW1 LED Switcher Blinkey Kit
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