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Audio preamplifier and microphone Schematics

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Radio Shack Pressure Zone Microphone (PZM) Modifications

Radio Shack Pressure Zone Microphone (PZM) Modifications

This articel gives instructionf for better power supply circuit and also other ideas.

http://www.gweep.net/~rocko/PZM/

Balanced mic or line amp with TUBES

Balanced mic or line amp with TUBES

uses two 12AU7 tubes in a class-A cathode-driven input stage, followed by a class-AB1 cathode follower output stage, 6db gain, requires 90VDC and 12VDC

http://www.montagar.com/~patj/lineamp1c.gif

The TNT Pressive®

The TNT Pressive®

A DIY passive preamplifier.

http://www.tnt-audio.com/clinica/pressive_e.html

Microphone Polarity Tester

Microphone Polarity Tester

http://www.ethanwiner.com/micpolar.html

Underwater microphone

Underwater microphone

http://circuitos.tripod.cl/schem/r60.gif

Wireless Microphone

Wireless Microphone

http://library.thinkquest.org/16497/gather/cgi-bin/projects/4.gif

DAT-Heads Digest 195

DAT-Heads Digest 195

many electret microphone wiring tips

http://www.solorb.com/dat-heads/digests/V3.100/D195

Use amplifier phono input as line level input

Use amplifier phono input as line level input

http://www.hut.fi/Misc/Electronics/circuits/phono.html


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