590 Fishers Station Drive
Victor, NY 14564
Prices, availability, and specifications are subject to change. Not responsible for typos, mistakes, stupids, or New Year’s morning
headaches! Robin gets coal this year for making me get this ad copy done before the Turkey! Visit www.ramseykits.com for the
latest pricing, specials, terms and conditions. Copyright 2014-2015 Ramsey Electronics®... so there!
Stereo Audio Platform Gain Controller
The SGC1 is one of our latest kits, and provides a great solution to the age-old problem: how can we easily correct inconsistent audio levels without negatively affecting the dynamics of the audio
signal? The SGC1 circuit implements a principle known as the "Platform Gain Principle," which was originally
developed by CBS Labs to allow transmitted audio levels to be automatically adjusted to keep them within a
Think of it like an audio engineer, constantly adjusting the output level in order to limit highs that would be too
loud while boosting lower levels so that they can still be heard. You may think "oh, this is just another
limiter/compressor!" Not so! Here's the real trick: keeping the full dynamic range ratio of the output signal the
same as the original input - something the typical limiter/compressor can only dream of doing! The SGC1 can be
placed in just about any standard analog stereo line level audio circuit to keep the audio level within the desired
range. It's also the perfect addition to any of our hobby kit transmitters, allowing you to match levels between
different audio sources while keeping lows audible and preventing the highs from overdriving.
In addition to its useful basic function and great audio performance, the SGC1 also boasts a front panel LED
meter to give an indication of the relative level of the input signal, as well as a front level control that allows you
to adjust the controller to the min/max center point of your desired level range. And yes, it is a Stereo Gain
Controller! Meaning that the levels of both the left and right channels are monitored and adjusted equally, thereby maintaining the relative virtual position of things like instruments, singers and speakers! The entire unit is
housed in a slim attractive black textured aluminum case that is sure to complement your studio or home theatre. If you're looking for perfect audio levels, hire a broadcast audio engineer, but if that doesn't fit your budget,
the SGC1 is the next best thing! Includes 15VDC world-wide power adapter.
SGC1 Stereo Audio Platform Gain Controller Kit $179.95
Synthesized FM Stereo
The FM25 has been the hobbyist’s standard for FM synthesized
stereo transmitters for more than
two decades! Just plug in the
stereo left/right audio from your
MP3 player, CD player, or computer, and broadcast it on any frequency in the standard FM broadcast band.
The FM25B brings stereo line level audio into the unit
through a 3.5mm stereo phone jack. A loop out is
provided at the input for monitoring. The unit features a PIC microprocessor for easy frequency programming through board mounted DIP switches. The
transmit frequency is Phase Locked Loop (PLL) controlled for unparalleled stability making frequency drift
a thing of the past, extremely critical for digital tuners.
The RF output level is adjustable from 5u W to 25 m W
via a potentiometer. Use the built-in whip antenna or
use an external antenna with the standard "F" external
antenna connector on the rear panel. Includes power
supply & stereo cable. (Note: The FM25B is a do-it-yourself
learning kit that you assemble. Please remember that the end user
is responsible for complying with all FCC rules & regulations within
the US, or any regulations of their respective governing body in
regards to the application and use of the FM25B.)
The famous RF preamp that’s been
written up in the radio & electronics
magazines! This super broadband preamp
covers 100 KHz to 1000 MHz! Unconditionally stable
gain is greater than 16dB while noise is less than 4dB!
50-75 ohm input. Runs on 12-15 VDC.
SA7 RF Preamp Kit $16.95
Touch on, touch off, or momentary
touch hold, it’s your choice with this
little kit! Uses CMOS technology.
Actually includes TWO totally separate touch circuits
on the board! Drives any low voltage load up to
100mA. Runs on 6-12 VDC.
TS1 Touch Switch Kit $9.95
FM25B Synth FM Stereo Xmtr Kit $139.95
Mad Blaster Warble Alarm
If you need to simply get attention, the “Mad Blaster” is the
answer, producing a LOUD ear
shattering raucous racket! Super for
car and home alarms as well. Drives
any speaker. Runs on 9-12VDC.
MB1 Mad Blaster Warble Alarm Kit $9.95
Laser Light Show
Just like the big concerts, you
can impress your friends with
your own laser light show!
Audio input modulates the
laser display to your favorite music!
Adjustable pattern & speed. Runs on 6-12VDC.
LLS1 Laser Light Show Kit $49.95
Water Sensor Alarm
This little $7 kit can really “bail you out”!
Simply mount the alarm where you want to
detect water level problems (sump pump)!
When the water touches the contacts the
alarm goes off! Sensor can even be remotely
located. Runs on a standard 9V battery.
MK108 Water Sensor Alarm Kit $6.95
20 Watt Mini Audio Amp
Delivers a super clean 20W output
from one SMT package! Ultra efficient class D design produces no heat.
PCB can be snapped into a small circle for
special applications. Runs on 18VDC for rated
output, or down to 10VDC for reduced output.
UAM2 20W Subminiature Amp Kit $52.95
HV Plasma Generator
Generate 2” sparks to a handheld
screwdriver! Light fluorescent tubes
without wires! This plasma generator creates up to 25kV at 20kHz from a
solid state circuit! Build plasma bulbs from
regular bulbs and more! Runs on 16VAC or 5-24VDC.
PG13 HV Plasma Generator Kit $64.95
Air Blasting Ion Generator
Generates negative ions along with a
hefty blast of fresh air, all without any
noise! The steady state DC voltage
generates 7.5kV DC negative at 400uA,
and that’s LOTS of ions! Includes 7 wind
tubes for max air! Runs on 12-15VDC.
IG7 Ion Generator Kit $64.95
Speedy Speed Radar Gun
Our famous Speedy radar gun
teaches you doppler effect the
fun way! Digital readout displays in MPH, KPH, or FPS. You
supply two coffee cans! Runs on
12VDC or our AC121 supply.
SG7 Speed Radar Gun Kit $74.95
Tri-Field Meter Kit
“See” electrical, magnetic, and RF fields as
a graphical LED display on the front panel!
Use it to detect these fields in your
house, find RF sources, you name it.
Featured on CBS’s Ghost Whisperer to
detect the presence of ghosts! Req’s 4 AAA batteries.
TFM3C Tri-Field Meter Kit $74.95
Passive Aircraft Monitor
The hit of the decade! Our patented receiver
hears the entire aircraft band without any
tuning! Passive design has no LO, therefore
can be used on board aircraft! Perfect for air-shows, hears the active traffic as it happens!
Available kit or factory assembled.
ABM1 Passive Aircraft Receiver Kit $89.95
The kit has a pulsing 80 volt tickle
output and a mischievous blinking LED. And who can resist a
blinking light and an unlabeled
switch! Great fun for your desk,
“Hey, I told you not to touch!” Runs on 3-6 VDC.
TS4 Tickle Stick Kit $9.95
LED Red Blinky
Alternately flashes two jumbo red
LEDs. You’ve seen this used on
name badges, hats, buttons,
and attention getters for decades!
Has been the most popular 1st learning
kit for kids young and old! Runs on 3-9VDC.
BL1 LED Red Blinky Kit $7.95
12VDC Worldwide Supply
It gets even better than our AC121
to the left! Now, take the regulated
Level-V green supply, bump the current up to 1.25A, and include multiple blades for global country compatibility! Dual ferrite cores!
PS29 12VDC 1.25A Worldwide Supply $19.95
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
12VDC Regulated Supply
Go green with our new 12VDC 1A regulated supply. Worldwide input 100-
240VAC with a Level-V efficiency! It
gets even better, includes DUAL ferrite
cores for RF and EMI suppression. All
this at a 10 buck old wallwart price!
AC121 12VDC 1A Regulated Supply $9.95
Broadband RF Preamp
Need to “perk-up” your counter or
other equipment to read weak signals? 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. Asmb.
PR2 Broadband RF Preamp $69.95
; Stereo audio processing while preserving audio dynamics!
; True stereo control keeps virtual sonic source location intact!
; Auto-bypass restores original levels when power is turned off!
; Built-in bar graph indication of signal level with display mute!
GET THE DISCOUNT!
Mention or enter the coupon
code NVRMZ142 and receive
10% off your order!
3.4dB Gain FM Omni Antenna
Our 5/8 wave omni antenna has been the
standard for LPFM insallations worldwide.
Provides 3.4dB gain while keeping the signal
radiation low to the horizon for maximum
range. Field tuneable over the entire FM
range for a perfect match. SO239 connector.
FMA200E Omnidirectional FM Antenna $139.95