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Definition of "ac701":

The AC701 is a subminiature triode vacuum tube manufactured by Telefunken in Germany. It was a 4V tube, and small enough to fit inside the body of a 22mm-diameter microphone.

The AC701 was the first “indirectly heated” tube; this means the cathode and filament were two parts, insulated from one another.

Read more about the AC701 at radiomuseum.org.

Read about distinguishing legitimate Telefunken AC701 tubes from counterfeit AC761 tubes.

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Find mics tagged 'ac701 AND:'

tube pencil-mic detachable-capsule transformer-coupled end-address telefunken transformerless condenser variable-tube-voltage dual-voice colette side-address large-diaphragm stereo multipattern center-terminated dual-capsule mid-side xy-stereo blumlein dual-tube dual-diaphragm ck12 haufe tripolar nickel-diaphragm k47 m7 pvc msc2 kk83 spherical-capsule kk50 kk53 k67 hpf

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Find mics tagged 'ac701 OR:'

tube pencil-mic detachable-capsule transformer-coupled end-address telefunken transformerless condenser variable-tube-voltage dual-voice colette side-address large-diaphragm stereo multipattern center-terminated dual-capsule mid-side xy-stereo blumlein dual-tube dual-diaphragm ck12 haufe tripolar nickel-diaphragm k47 m7 pvc msc2 kk83 spherical-capsule kk50 kk53 k67 hpf

Mics tagged: ac701

	Schoeps Mikrofone M 221 B Pencil Tube Condenser Microphone tube, pencil-mic, detachable-capsule, transformer-coupled, end-address, ac701, telefunken
	Schoeps Mikrofone M 222 Detachable-Capsule Pencil Tube Condenser Microphone tube, pencil-mic, transformerless, detachable-capsule, condenser, ac701, variable-tube-voltage, dual-voice, colette
	Neumann SM 69 Multi-Pattern Tube Condenser Stereo Microphone side-address, large-diaphragm, tube, stereo, multipattern, transformer-coupled, center-terminated, condenser, dual-capsule, mid-side, xy-stereo, blumlein, dual-tube, ac701
	Telefunken Elektroakustik Ela M 251 Multi-Pattern Tube Condenser Microphone side-address, large-diaphragm, dual-diaphragm, tube, multipattern, transformer-coupled, ck12, condenser, haufe, ac701, tripolar
	Telefunken Elektroakustik Ela M 250 Multi-Pattern Tube Condenser Microphone side-address, large-diaphragm, dual-diaphragm, tube, multipattern, transformer-coupled, ck12, condenser, haufe, ac701
	Neumann KM 54 Cardioid Pencil Tube Condenser Microphone tube, pencil-mic, transformer-coupled, end-address, nickel-diaphragm, ac701
	Neumann M 249 Multi-Pattern Tube Condenser Microphone side-address, large-diaphragm, tube, transformer-coupled, condenser, k47, m7, pvc, ac701, msc2
	Neumann M 49 Multi-Pattern Tube Condenser Microphone side-address, large-diaphragm, tube, transformer-coupled, condenser, k47, m7, pvc, ac701, msc2
	Neumann M 50 Omnidirectional Tube Condenser Microphone side-address, tube, condenser, pvc, ac701, kk83, msc2, spherical-capsule, kk50, kk53
	Neumann M 269 C Multi-Pattern Tube Condenser Microphone side-address, large-diaphragm, tube, multipattern, k67, transformer-coupled, condenser, hpf, ac701