Hi,

At a radio rally, I bought a ALC/AGC module for £5 which seems to be for
audio use. On the supplied data sheet is shows the input and output as
+4dBu. (Unity Gain) With an ALC range of -16 to +14 dBu and headroom 18dB.

Does anyone know what a dBu is ?

I was thinking of building it into either a headphone amplifier, or
amplified speaker, to use with some of the simple radio receiver kits which
have very little or no AGC function, but I am looking to see what sort of
drive level it needs.

Here is the website which explains more (See PDF) :-..

http://www.canford.co.uk/commerce/Pr...oductid=58-543

Regards

Alan