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Kits and Modules > Audio Pre/Power Amplifiers >  Returning Customers
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VOLUME AND TONE CONTROL - PREAMPLIFIER

k8084.jpg
When using one of our amplifiers (big or small), you always need a volume control and preferably also a tone control.
This kit comes complete with all input / output connections and potentiometers.
Furthermore it is possible to amplify or attenuate the input signal.


Features
stereo volume control
stereo Baxandall bass and treble control
bass and treble potentiometers with centre click
customizable attenuation or amplification
complete with knobs


Specifications
supply voltage: 2 x 12VAC / 100mA
frequency response: 3Hz - 500kHz (-3dB)
standard amplification: x1
signal to noise ratio: 98dB
harmonic distortion: < 0.005% (@1KHz)
maximum output: 5V RMS
tone control:
+ and -15dB @ 20Hz
+ and -15dB @ 15kHz
Input impedance: 50k ohms
dimensions: 4.1 x 2.75"
 
Quantity
Price
1 – 9$28.05
10 – 99$26.06
100 +$25.19

  (Kit - Basic Soldering Required)  
  K8084  
  2  
 
 
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Preamplifier
 
A preamplifier to use with an electret or other microphone to boost the signal before feeding into an amplifier. Simple and easy to build. PCB Size: 1.75" x 1.25". Power supply: 6 to 12VDC (Electret microphone Included)
Quantity
Price
1 – 9$13.68
10 – 99$12.96
100 +$11.88

  (Kit - Basic Soldering Required)  
  CPS98  
  36  
 
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UNIVERSAL MONO PRE-AMPLIFIER
 
This kit has been developed as pre-module for a number of audio applications where there is insufficient input signal. Applications as a microphone pre-amplifier or for level correction. Specifications power supply: 10-30V DC / 10mA output impedance: 1Kohm adjustable output level: max. 40dB frequency range: 20Hz to 20kHz ± 3dB max. input signal: 40mV PCB dimensions: 1.2" x 1.7" options for power supply: K1823 (K1803)
Quantity
Price
1 – 9$11.54
10 – 99$10.94
100 +$9.99

  (Kit - Basic Soldering Required)  
  K1803  
  6  
 
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Stereo Preamplifier - Tone Control Unit
 
This is a preamplifier and tone control unit
which will make a useful addition to any
of our power amplifier kits. It is extremely
easy to construct due to the use of a special IC,
the Philips TDA 1524A. This contains all the
circuitry required to provide up to 20 dB of
voltage gain, +/-15 dB of bass and treble
control, channel balance, and a switchable
loudness contour.
Specification
D.C. Input : 15V DC supply or 12V DC battery. 50 mA min.
Maximum output : > 3 V RMS
Maximum input : > 300 mV, G = 20 dB
> 3V RMS, G = 0dB. Input Z > 10 k ohm. Output Z < 300 ohm
Frequency resp. : < 10 Hz to > 50 kHz + / – 1 dB
THD at 1kHz : < 0.1 % at 1V output
S/N ratio : > 80 dB, G = 0 dB
Bass boost/cut ~ 15 dB at 50 Hz
Treble boost/cut ~ 15 dB at 15 kHz
PCB size: 4 inches x 2 1/4 inches. (CPS100)
Quantity
Price
1 – 9$28.10
10 – 99$26.10
100 +$25.23

  (Kit - Basic Soldering Required)  
  CPS100  
  13  
 
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