The High Tech
Digital Controlled FM Stereo Transmitters
✔ 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 broacasts
✔ Available in domestic kit or factory assembled
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.)
FM30B Digital FM Stereo Transmitter Kit, 0-25m W, Black
FM35BWT Digital FM Stereo Transmitter, Assembled, 1W, Black (Export ONLY)
Hi-Res Elevation Sensor
✔ Elevation resolution to 1/3”!
✔ Pressure resolution to .0001kPa!
✔ 128x64 pixel
✔ USB computer
✔ Built-in Li-Ion battery!
The response to the UP24 was incredible!
Customers from professional land surveyors, mete-orologists, scientists, pilots and hikers to the curious hobbyist were overwhelmed with its sensitivity
and accuracy. Reading realtime elevation to a
third of an inch blew their minds! We made it
even better...introducing the next generation
First, for extended field use, we designed an internal lithium ion power cell and a state of the art
power management system. Now you can charge
it while it’s connected to your USB connection, or
use an external charger! Next we added a “MARK”
feature. This allows storing a single data point
reading when YOU want instead of blindly storing
readings at the selected sample rate from an
external switch (dry or electronic). Data is in
comma delimited form for easy spreadsheet use.
Then we streamlined the controls to make a more
compact profile. The rotary menu navigation dial
has been replaced by contactless proximity buttons for more reliable operation! Just touch your
way through the menus without any dials or
switches! All in a handheld device that weighs
less than 4oz! Visit www.ramseykits.com for
details, there’s just too much to fit here!
UP24B Elevation/Pressure Sens Kit $239.95
UP24BWT UP24B Factory Asmb $299.95
Pocket Audio Generator
A perfect test source for stereo line inputs on
any amplifier or mixer. Provides 50Hz, 100Hz,
1kHz, 10kHz, & 20kHz tones, plus 32 bit digital pink noise. Great to help you identify
cables or left/right reversals! Stereo RCA line
level outputs. Uses 2xCR2025, not included.
K8065 Pocket Audio Generator Kit
Pocket Vu Meter
Hand held audio level meter that fits in your
pocket! Built-in mic picks up music and audio
and displays it on an LED bargraph. Includes
enclosure shown. Runs on one 3V Li-Ion button cell, not included. If you ever wanted an
easy way to measure audio levels, this is it!
MK146 Pocket Vu Meter Kit
Portable FM Radio
Now you can build yourself a little
FM radio receiver, learn about FM
receivers, and have a neat little radio
in the end! The RF front end is pre-
assembled to make it simple. Receives the whole FM
broadcast band 88-108 MHz. Runs on 12VDC.
MK118 FM Radio Receiver Kit $21.95
Mini LED Light Chaser
This little kit flashes six high intensi-
ty LEDs sequentially in order. Just
like the K80302 to the right does
with incandescent lights. Makes a
great mini attention getter for signs, model trains, and
even RC cars. Runs on a standard 9V battery.
MK173 Mini LED Light Chaser Kit $13.95
Running Light Controller
Controls and powers 4 incandescent
lights so they appear to “travel” back
and forth (Like the hood on KITT!).
Great for the dance floor or promotional material attention getters,
exhibits, or shows. Runs on 112-240VAC.
K8032 4-Channel Running Light Kit
High Power LED Driver
High power LED’s have finally
found their way into the hobbyist
budget, but now you need a driver!
This little board provides the accurate
and constant current need to drive them.
Delivers 350mA or 700mA at a constant current
K8071 High Power LED Driver Kit $14.95
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
Electronic Watch Dog
A barking dog on a PC board! And you don’t
have to feed it! Generates 2 different selectable barking dog sounds. Plus a built-in mic
senses noise and can be set to bark when it
hears it! Even includes adjustable sensitivity!
Eats 2-8VAC or 9-12VDC, it’s not fussy!
K2655 Electronic Watch Dog Kit
Laser Trip Senser Alarm
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.
LTS1 Laser Trip Sensor Alarm Kit $29.95
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
Call Code Activated Switch
What a concept... control things by the
number of rings on your phone, and
the number of rings is adjustable! Plus
you can store up to 42 different codes!
Activation can switch on a timer from 3 seconds to 56 hours. Relay output. Runs on 12VDC.
K2650 Call Code Activated Switch Kit $29.95
Electret Condenser Mic
This extremely sensitive 3/8” mic
has a built-in FET preamplifier! It’s
a great replacement mic, or a perfect
answer to add a mic to your project.
Powered by 3-15VDC, and we even include coupling
cap and a current limiting resistor! Extremely popular!
MC1 Mini Electret Condenser Mic Kit $3.95
Sniff-It RF Detector Probe
Measure RF with your standard
DMM or VOM! This extremely sensi-
tive RF detector probe connects to
any voltmeter and allows you to
measure RF from 100kHz to over 1GHz! So sensitive it
can be used as a RF field strength meter!
RF1 Sniff-It RF Detector Probe Kit
Broadband RF Preamp
Need to “perk-up” your counter or
other equipment to read weak sig-
nals? This preamp has low noise and
yet provides 25dB gain from 1MHz to well
over 1GHz. Output can reach 100m W! Runs on
12 volts AC or DC or the included 110VAC PS. Assmb.
PR2 Broadband RF Preamp $69.95