Microphone Booster

Acoustic testing requires a microphone and a microphone. Preliminary booster♪ Well, there he is. And that's good enough for sound recording. The design has been quite simple, it's the construction of the day off. It's done for one Sunday from the succes. The quality is very decent and he's performing his functions just on "good" and the price is so funny. ♪ ♪

That's what it looks like. (The paint on the picture opens it in the new window; all the photos, except the last, are old, but there's no change in principle, so I left them):

The microphone is placed in the metal hull from the minidgeca - and solid, and the extra screen, and beautiful. The mounting pattern despite simplicity has very good parameters:

The upper part is the power unit. Varistor protects against voltage discharges, the filter from high frequency interference. The same-semi-operioid stitch is very small. Details of this food supplyits work and construction can be read here: A small power unit. The red lighting LED1 serves as a sign for the network. It's connected to the "minus," which means to create a more even load on the block, because the "plus" is connected to a green LED2.

The forcer itself is downstairs. His pattern changed a little. The reason for the change was two:

1. With a large volume, there was a limit (clipping) of the signal by the surgeon. In order to control it, a P1-Point has been transferred from the OHS to its entrance.