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Microphone Circuit Test Oscillator - This unit would be mounted in a
small plastic or preferably metal box, with a 9V battery, level control, a male
XLR connector (same as on a mic) and a switch. Current drain is low, since
the circuit only uses one dual opamp. There is no need for a high quality
device, and a 1458 is all that is needed....(schematic / circuit added 2/07)
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Microphone from a Speaker - A circuit to Impedance Match a Speakeras a
Mike. Speakers can make a Good Microphone for some applications.
Bigger Speakers may also have a Good Low Frequency Response. Ever seen a 15
Inch Microphonethis Circuit will do it....(design added 12/08) |
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Microphone Mixer - Designed for 3-dynamic microphones...This relatively
simple mixer was designed for three dynamic microphones, but can be re-designed
for more or less. Level and tone controls are available to tailor the sound to
your needs…. [Anatoly I. Shikhatov is the designer] |
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Microphone Polarity Tester - (electronic schematic added 8/02)
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Midi Passthrough Circuit - (electronic circuit added 1/03) |
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Mike Mute - Designed by R.G. Keen. (added 05/08)
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Mike Pads & Other Small Gadgets - Includes Active Direct Box circuit
(added 4/02) |
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Mike Preamp Power Supply with Phantom Power - Uses a single 48 VAC
center-tapped transformer (Circuit design added 08/08/08) |
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Minature FM Transmitter - This miniature transmitter is easy to
construct and it's transmissions can be picked up on any standard FM radio.
It has a range of up to 1/4-mile (Tony van Roon's 400 meters) or more, depending
on the line-of-sight, obstructions by large buildings,etc. It is great for
room monitoring, baby listening, nature research,.... [Tony van Roon's circuit] |
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Mini Bench Amplifier - This mini audio amplifier will test the audio
stages in amplifiers such as the front end of FM bugs. You can also use it on lots
of our other projects as well as the output stages of radios. It is a very handy
piece of test equipment and will make a perfect addition to your
collection....(electronic circuit added 4/05) |
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Mini Portable Guitar Amplifier - Can be fitted into a packet of
cigarettes. Also suitable as Fuzz-box (added 3/05) |
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Mini Sixties Plus - This circuit is inspired by an amplifier published
in the ’60s that produced 8 watts a channel into 8 Ohm and was based on AD161 and
AD162 germanium (not ‘geranium’) power transistors. These at last made it possible
to build complementary-symmetry power stages with performance similar to that
obtained with the standard at the time: a class AB ‘push-pull’ using with two EL84
pentodes.….must register on this site... [Published in Elecktor July/August 2010] |
