Desk Mike
This page shows the layout and lists the components required to build a

Battery powered desk microphone



Component List


TR1-BC549.... TR2-BC559.......VR1-5KOhm.........SW1-DPDT type

MIC-Electret miniature........R1-1K........R2-330 Ohm......R3-100K

R4-10K......R5-470 Ohm.....R6-470 Ohm......R7-1K.....R8-4.7K.......R9-100K

C1-1 UF 50 V.......C2-1nF metal film.......C3-4.7 nF ceramic......C4-1 UF 50 V

C5-1 UF 50 V.......C6-0.1 UF ceramic......C7-0.1 UF ceramic

The battery to be used is an AA type


This mike is VERY POWERFUL you will only need to have the gain very low to be the same level as a stock mike !

I have designed this mike to be loud but i have restricted it because it was too BLOODY LOUD !

This mike works best on FM or AM sets,
it is too loud for SSB
(it picks up too much background noise)


If you build this unit and like it please email me !


Enjoy !


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