kato
Well-known member
long-winded intro:
I bought a fancy converter for doing podcasting at work. The metric halo 2882. Looks amazing right? I thought it would be the perfect piece of gear for our mics. But then I discover, after purchasing, the preamps only provide 40dB of gain. That won't work because all we have are dynamic mics, and the voices are entering the computer much too quiet.
The budget is mostly busted on the converter purchase. So my only option I can think of is to buy a behringer preamp box for $99 - the thought of which pains me to no end. Then I remembered the so-called $5 mic pre.
simple question:
I want to try the most simple schematic from the 1510 datasheet., figure 2, reproduced below. What do I use for AC-coupling the output? (I assume just a polarized electrolytic, but what value?) And is that coupling capacitor even necessary if I build these with fixed gain? I'm assuming the metric halo has some kind of coupling of it's own. Any thoughts?
Here's figure 2 as referenced in the datasheet quote above:
I bought a fancy converter for doing podcasting at work. The metric halo 2882. Looks amazing right? I thought it would be the perfect piece of gear for our mics. But then I discover, after purchasing, the preamps only provide 40dB of gain. That won't work because all we have are dynamic mics, and the voices are entering the computer much too quiet.
The budget is mostly busted on the converter purchase. So my only option I can think of is to buy a behringer preamp box for $99 - the thought of which pains me to no end. Then I remembered the so-called $5 mic pre.
simple question:
I want to try the most simple schematic from the 1510 datasheet., figure 2, reproduced below. What do I use for AC-coupling the output? (I assume just a polarized electrolytic, but what value?) And is that coupling capacitor even necessary if I build these with fixed gain? I'm assuming the metric halo has some kind of coupling of it's own. Any thoughts?
Other than the connection to the protection di-
odes, the 1510/1512 input pins are connected only to
the bases of their respective input devices. For
proper operation, the bases must be provided a
source of dc bias that will maintain the inputs within
the IC’s input common-mode range. Two different
schemes for this are shown in Figures 2 and 3. Fig-
ure 2 is simple, but its output will need to be
ac- coupled to the next stage, particularly if RG is vari-
able to allow gain adjustment. 1510/1512 input stage.
Here's figure 2 as referenced in the datasheet quote above: