BATC Forum

Hi all,

For some time now i'm working with the Quadrant DVB transmitter, the picture is perfect.

But I have some problem with the audio input, and confused ?
To make shore that I doing the right thing, help me out here.

What type of microfoon should I use. ?
Do I need a preamplifier ?
Ore are there other thing i'm overlooking ?

All help is appreciated

Jan / Pd0hni

Hi Jan

I use one of the Quadrant / BATC DTX1 in our 23cm repeater GB3EY.

The audio input is the standard 'Line Input' of 0dBm into 600 ohms. That equates to 0.775V RMS, so you do need an amplifier to lift the microphone level with a gain of 40-60dB depending on the microphone performance.

For an explanation see https://en.wikipedia.org/wiki/Line_level

Clive G3GJA

Hi Clive,
Thank you for your response.
I will look in to this, and try to figure out how the things are on my side with my microfoon.
I have 2 I have to find out witch one is better.
The 600 Ohm condenser microfoon ore the 400 Ohm Dynamic microfoon ?

Thank you for your information.

' 73 Jan / Pd0hni