(Electronic mixer) An electronic mixer is a device that combines two or more electrical or electronic signals into one or two composite output signals. There are two basic circuits that both use the term mixer, but they are very different types of circuits: additive mixers and multiplying mixers.
A membranous fold in a hollow organ or tubular structure, such as a blood vessel or the digestive tract, that maintains the flow of the contents in one direction by closing in response to any pressure from reverse flow
a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it
device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone
A cylindrical mechanism in a brass instrument that, when depressed or turned, admits air into different sections of tubing and so extends the range of available notes
control consisting of a mechanical device for controlling the flow of a fluid
A device for controlling the passage of fluid through a pipe or duct, esp. an automatic device allowing movement in one direction only
Hickok 533A Mutual Transconductance Meter
My Hickok 533A Tube Tester's Hickok 533A Mutual Transconductance Meter.
Setting the line voltage calibration for 117vac. Mixed lighting Samsung p&s
Digital Arrangement
Electronic components and pearl inlaid trumpet valve head laid on beech board. 26 x 32.