Subminiature 40W Stereo Amplifier
✔ 2 independent 20 watt amplifiers in one
✔ Super efficient Class D spread spectrum design!
✔ Built-in click and pop suppression!
✔ Selectable gain from +22dB to +36dB!
✔ Logic level mute and shutdown!
✔ Runs cool, no heat sink required!
✔ Built-in thermal protection!
✔ Runs on 10 to 18 VDC
N e2 w0 0F8o r
40 Watts, 87% Efficient, No Heat, All On A 2½” Board!
The UAM4 is the big brother to the extremely popular UAM2. It uses the latest
spread spectrum amplifier technology to bring you clear, crisp, high-power audio
without any of the heat which is normally associated with such an amplifier. Its
extremely clean Class D design produces two independent 20 watt outputs! This
can also be bridged to an extremely efficient (87%!) single channel (mono) 40
And at 40 watts, you’re probably already wondering about the heatsink requirements to dissapate the heat, right? Stop wondering, there’s no heat, so there is
no heatsink required! And all that power is generated in a single SMT device the
size of your thumbnail on a small 2½” square board!
The high impedance input is designed to use your choice of either a balanced line
input or an unbalanced signal source using easy to connect Euro terminal blocks.
Logic connections to ground are also provided to mute and/or shut down the
amplifier. You can also enable the built-in over temperature signal to activate one
of these controls automatically! Easy to use board jumpers offer selectable gain of
+22dB, +25dB, + 29.5dB or +36dB to match your input levels. Board jumpers
also enable protection and shutdown options as well as stereo/mono/bridge
mode. The amplifier also features built-in click and pop suppression to protect
not only your ears and sanity, but your speakers and equipment!
Power input for maximum rated output is 18VDC at 2.64A. Input voltage can be
reduced to a minimum of 10VDC while maintaining the same high efficiency
operation with reduced output power. If you’re looking for an incredible stand-alone stereo (or mono) amplifier to build into your equipment, vehicle, speakers,
or application, the UAM4 is the latest and the greatest!
UAM4 40W Subminiature Stereo Audio Amplifier Kit
✔ Monitor vehicle performance to save gas!
✔ Stores up to 300 hours of trip details!
✔ Records time, date, distance, speed, events
and up to 4 separate engine parameters!
✔ Records extreme acceleration and braking!
✔ Automatic accident log, records the last 20
seconds before impact!
✔ View and reset engine diagnostic trouble codes!
✔ Test for preliminary emissions status!
No comments are necessary this summer about the
cost of gas! Last month’s ad said approaching 4 bucks.
Look what happened in a month, now it’s approaching
5 bucks a gallon! At that price it’s more important than
ever to make sure your vehicle is in tip-top shape for
the most economical performance possible.
Did you know old spark plugs can reduce fuel economy by 30%? It gets worse...
a bad oxygen sensor cuts it by 40%! And that relates to a lot of extra gas and at
5 bucks a gallon, just do the math... That’s a LOT of money!
With the CarChip Pro you'll have complete access to all your vehicles diagnostic
data at your fingertips! Sort miles by type (business, personal or driver), set
thresholds for alarms, calculate gas mileage, log extreme acceleration and braking, speed, engine parameters, and a whole lot more! And as you know,
extreme acceleration does not equal fuel economy! Find out who’s driving your
vehicle like a race car...and deal with it!
The CarChip Pro is great if you have a new driver in the family. Easily monitor
their performance and let them gain additional privileges with a good driving
record! You have the proof!
No more taking your car in to see why your “check engine” light is on. The
CarChip Pro will automatically provide the trouble codes and allow you to reset
it! CarChip Pro includes storage for up to 300 hours of driving data! If you're
unfortunate enough to be involved in an accident, it even records all the vehicle’s
parameters for the last critical 20 seconds of operation! Includes USB cable, software and complete instructions.
8226 Davis OBDII CarChip Pro Data Logger $99.95
Passive Aircraft Airband Receiver
✔ Monitors the entire 118-136 MHz aircraft
band without tuning!
✔ Great for air shows!
✔ Passive design, can be used onboard aircraft!
✔ Patented circuit and design!
For decades we have been known for our novel and creative
product designs. Well, check this one out! An aircraft receiver
that receives all nearby traffic without any tuning. It gets better...
there is no local oscillator so it doesn't produce, and can't produce, any interference associated with all other receivers with an
LO. That means you can use it onboard aircraft as a passive
device! And what will you hear? The closest and strongest traffic,
mainly, the one you're sitting in! How unique is this? We have a patent on it,
and that says it all!
This broadband radio monitors transmissions over the entire aircraft band of 118-
136 MHz. The way it works is simple. With AM the strongest man wins! The
strongest signal within the pass band of the radio will be heard. Just imagine the
excitement at air shows. No need to look up frequencies, just listen to the air-air,
air-to-ground, and air boss traffic active at the moment! Receiver sensitivity is less
than 2uV for detectable audio. Headset cord is coupled as the antenna giving
you great reception. Also includes a set of stereo ear buds. Runs on a standard
9V battery. Available as a thru-hole kit or factory assembled & tested SMT version.
ABM1 Passive Aircraft Airband Receiver Kit $89.95
ABM1WT Factory Assembled & Tested ABM1, SMT Version $159.95
3-In-1 Multifunction Lab
The handiest item for your bench! Includes a
RoHS compliant temp controlled soldering station, digital multimeter, and a regulated lab
power supply! All-in-one small unit for your
bench! It can’t be beat! The PS provides 3, 4. 5, 6, 7. 5, 9, and 12VDC regulated
outputs at 2A peak. Unclutter your bench today with the 3-In-1 Lab!
LAB1U 3-In-1 Multifunction Lab
Digital Controled FM
✔ Rock stable PLL synthesized exciter
✔ Front panel digital control and
display of all parameters!
✔ Professional metal case
✔ Super audio quality!
✔ 25m W kit and 1W export models!
For nearly a decade we’ve been the leader in hobbyist FM radio transmitters.
When it became time for a new model, we started from the ground up! 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 T WO 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! Both are designed around an RF tight
vinyl clad metal enclosure for noise free and interference free operation. All settings are done
through the front panel digital control and LCD display and are stored in non-volatile memory for
Both the FM30 and FM35WT operate on 13. 8 to 16VDC and include a 15VDC
110/220VAC plug in power supply. The stylish black anodized aluminum case
measures 5. 55"W x 6. 45"D x 1.5"H. and is a great match to your other equipment.
(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
FM35BWT Export Only Transmitter Assembled, 1W
In Our 36th Year!
590 Fishers Station Drive
Victor, NY 14564
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latest pricing, specials, terms and conditions. Copyright 2008 Ramsey Electronics, LLC...so there!
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