Audio/HIFI Applications

Mini FM modulator (100-108MHz). Integrated pre-amplifier, to which any type of microphone may be connected. Family broadcasts, baby phone, security. May be received by any portable FM radio or tuner.

Specifications

power supply: 9 - 12V DC
input sensitivity preamplifier: 5mV
PCB dimensions: 1.8" x 2.8"

Price: $21.40

DUAL STEREO VU METER-K2668

This module contains 2 stereo VU meters with 2 x 5 LED indicators

Specifications

indication: -13, -8, -3, 0, +3dB
sensitivity: 0dB = 0.775Vrms (easily adjustable)
supply voltage: 14 - 18V DC / 62mA
PCB dimensions: 1.1" x 3.9"

Price: $27.20

PINK NOISE GENERATOR-K4301

To analyze the acoustic properties of a room (usually a living room), a good pink noise generator together with a spectrum analyzer is indispensable. Moreover, a microphone with as linear a frequency characteristic as possible (from 20Hz to 20kHz) is needed. If you have an equalizer available, then the response can not only be checked but also corrected. Easily adapted to produce "white noise"

Specifications

pseudo random digital noise
regulator sliding length: 33 bit
clock frequency: adjustable between 30 and 100kHz
pink noise filter: 3dB / octave (20Hz to 20kHz)
output voltage: 150mVrms
output impedance: 1Kohm
power supply: 9 - 12V AC or 12 - 15V DC / 5mA
PCB dimensions: 2.8" x 1.7"

Price: $21.80

MONO VU-METER 10 LEDS-K4304

VU meter with a scale consisting of 10 LEDs and an adjustable input. Dot or bar indicator. Supplied with 1 front panel suitable for horizontal or vertical mounting.

Specifications

range: -20dB to +3dB
power supply: 10 - 15V DC / 250mA
input sensitivity:
- low input: 150mV to 6Vrms (47K)
- high input: 1.5V to 60Vrms (470K)
dimensions: 1.5" x 2.7"

Price: $26.40

STEREO VU-METER 2 x 10 LEDS-K4305

Stereo VU meter with 2 x 10 LEDs (dot or bar indicator) and an adjustable input. Included in package : 1 front panel suitable for horizontal or vertical mounting.

Specifications

range: -20dB to +3dB
power supply: 10 - 15V DC / 250mA
input sensitivity:
- low input: 150mV to 6Vrms (47K)
- high input: 1.5V to 60Vrms (470K)
dimensions: 1.5" x 2.7" (x2)

Price: $29.00

PRECISION STEREO VU-METER 2 X 15 LEDS-K4306

Stereo VU meter with 2 x 15 LEDs (dot or bar indicator) and an adjustable input. Included in package : 1 front panel suitable for horizontal or vertical mounting.

Specifications

scale from: -23dB to +5dB (linear scale between -4 and +5dB)
precision: ± 0.5dB (1kHz)
input impedance:
- low input: 150mV - 5Vrms
- high input: 1.5V - 50Vrms
frequency range: 20Hz - 30kHz (-3dB)
power supply: 12 - 15V DC / 300mA
dimensions: 5.9" x 2.2"

Price: $58.00

AUDIO POWER METER-K4307

10 LED scale, up to 2000Wrms power measurements. Does not need a special power supply, because it is supplied directly from the speaker output. Ideal for car audio systems and PA systems. Also usable for bridged amplifiers. The unit can be used both horizontal and vertical. The kit comes with a front panel and four attractive front stickers, for the different scales.

Specifications

four different scales:
- at 4 ohm load in low power mode: 0.3 to 400Wrms
- at 4 ohm load in high power mode: 10 to 2000Wrms
- at 8 ohm load in low power mode: 0.15 to 200Wrms
- at 8 ohm load in high power mode: 5 to 1000Wrms
minimum input sensitivity: 1.1Vrms (low power mode)
maximum input voltage: 130Vpeak (high power mode)
current consumption: 25mA at full scale
luminous intensity: 8 to 20mcd / LED
dimensions: 4.7" x 1.6" x 1.1"

Price: $32.85

Amplifiers

$11.89

K27 Kit 27 TDA7052 1W Amplifier Module, Mono

A 1W power amplifier building block designed to be part of a larger project needing a low power battery operated amplifier into an 8 ohm speaker.

$21.78

K47 Kit 47 LM383/TDA2002 Amplifier Module

A proven & popular power amplifier building block for use in any audio project. Power output is dependent on the supply voltage and load resistance. Over 10W is typical for a 16V supply into a 2 ohm speaker. A 12V supply into a 4 ohm speaker will deliver around 4W. Small heatsink provided. In late 2000 the LM383 was discontinued but the TDA2002 is a direct replacement.

$16.33

K50 Kit 50 25W HiFi Audio Amplifier Module

Kit contains the essential components to build a hifi amplifier module using the LM1875 IC. Heatsink, speakers and cables are to be supplied by the user.

$14.99

K87 Kit 87 1W Stereo Amplifier Module

This stereo amplifier module uses the Samsung KA2209 8-pin IC. This is equivalent to the TDA2822. The circuit is the standard text-book circuit for this chip. No heat sink is required.

$25.46

K88 Kit 88 10W+10W Stereo Amplifier Module

The TDA2009 is a class AB dual Hi-Fi Audio power amplifier monolithic IC designed for quality stereo applications. This is the standard data book application circuit using a minimum of external components. Each channel is capable of delivering 10 watts into 4 ohm speakers using a 24Vdc supply voltage. Dimensions = 79mm x 50mm

$25.90

K89 Kit 89 Stereo VU Meter

A simple, low cost stereo VU meter. Two LM3915 dot/bar display driver ICs are used to drive 2 rows of 10 LEDs (14 green, 6 red) in a moving bar display. Each row of LEDs spans a power range of 0-30 dB in ten 3-dB steps. This VU meter indicates "peak music power" when used with audio amplifiers. Ideal add-on for any of the amplifier kits. Dimensions = 65mm x 42mm.

$25.50

K90 Kit 90 3W+3W Stereo Amplifier module

A simple stereo 3 watt per channel amplifier based on the BA5406 power amplifier monolithic IC. Minimum component count. Runs on 12Vdc power supply. Good general purpose amplifier. Dimensions = 67mm x 38mm. Requires heatsink (supplied.)

BA5406 data sheet

Scan of PCB

$18.15

K97 Kit 97 4 Watt Amplifier Module

using the LM380. The IC solders directly to the PCB so no heatsink is required.

$13.89

K98 Kit 98 Preamplifier

General preamplifier. It has a gain greater than 40dB which is enough for most applications. It can also take input from an electret microphone by adding one extra resistor (supplied in the kit.)

$36.50

K106 Kit 106 50W Hi-Fi Audio Amplifier Module

The TDA7294 monolithic IC is at the heart of this 50W amplifier module from ST Electronics. It is intended for use as an audio class AB amplifier in hi-fi applications. + / - 30V supply needed. Important: the user must supply a heatsink rated at 1.4 deg C / W. All components supplied.

$14.50

K115 Kit 115 1W Stereo Amplifier

Uses 2 LM386N-1 for a stereo amplifier. Ideal for Walkman and other battery powered items. 4V - 12V DC.

$12.90

K139 Kit 139 1W Stereo Amplifier Module with DC Volume Control TDA7053A.

$24.50

K155 Kit 155 Stereo Tone Control

UNIVERSAL STEREO PRE-AMPLIFIER-K2572

Universal low-noise stereo pre-amplifier.

Specifications

frequency range: 40Hz - 30kHz (-3dB)
max. input voltage: 50mVrms
adjustable gain: 40dB max.
output impedance: 1Kohm
power supply: 10-30V DC / 5mA
PCB dimensions: 1.7" x 2.6"

Price: $20.80

STEREO RIAA PRE-AMPLIFIER-K2573

RIAA stereo pre-amplifier for md pick-ups. Low noise.

Specifications

supply voltage: 10 -30V DC / 5mA regulated
gain (1kHz): 35dB
input signal: 5 - 10mV
input impedance: 47Kohm
PCB dimensions: 1.7" x 2.6"

Price: $19.20

7W MONO AUDIO AMPLIFIER-K4001

This small amplifier is constructed around the TDA2003 IC, capable of delivering 4Wrms at 4ohms. The IC is completely thermally and short-circuit protected. A conventional direct current can be connected as supply.

Specifications

music power output: 7W / 4ohm
RMS output: 3.5W / 4ohm or 2W / 8ohm
total harmonic distortion: 0.05% (1W / 1kHz)
frequency response: 20Hz to 20kHz (-3dB)
signal/noise ratio: 86dB (A weighted)
input sensitivity: 40mV / 150Kohm
overload and short-circuit protected
supply voltage: 15V DC (8 to 18V DC possible) / 0.5A
dimensions: 2.2" x 1.4"

Price: $16.60

Marshall 18W Tube Amplifiers Kit

With assembly manual, easy and clear to assemble

$750.00

(Now in stock, please call)