Preamp
module designed to bring a small input signal up to a suitable level to
drive an audio amplifier. Use with our 3017 to produce
full power output or our 3-Input Mono Mixer kit 1052.
Delivering a minimum gain of 40dB, this is normally more than enough for most applications. Gain can be increased by simply changing a single resistor value. See kit documentation below for full details.
The circuit can also take its input from an electret microphone by simply adding a resistor, both of which are included with the kit. This set-up can be used with kit 3017 to make a listening device amplifier as featured in our plans for Super Ear Listening Devices.
| Technical Specifications | |
|---|---|
| Power Supply | 6-12Vdc |
| Current | 3mA max. |
| Maximum input | ~ 100 mV RMS (gain = 27 dB) |
| Maximum output | ~ 2.5 V RMS with 12 V supply |
| Frequency resp. | ~ 70 Hz to 45 kHz ±3 dB (Standard setup) |
| THD | < 0.1 % at 1V 1kHz |
| Gain | 40dB max. (see Product Documentation link below for details) |
| S/N ratio | > 75 dBA |
| Board Dimensions | 30x43mm |
| Connections | Solder pads |
| Product Formats | SELF-ASSEMBLY Electronic Kit (KT
PRE-ASSEMBLED Electronic Module (AS) more |
| Documentation |
User
Manual |
Please see our Pre-Amps & Mixer Modules page for more products like this

