Audio Amplifier Kit 2 is a fun and simple project for both beginners and expert builders alike. Everything needed to build a fully functional audio amplifier is included in the kit. Easy to assemble with no soldering required. Audio Amplifier Kit 2 is a great project to build with your child or grandchild, boy scout groups and schools.

Audio Amplifier Kit 2 includes everything you need to build the kit with no soldering required. The kit even includes a screwdriver and wrench. The only thing you will need to supply is a 9 volt battery and a crystal radio.

Audio Amplifier Kit 2 was designed to compliment our Crystal Radio Kits (sold separately).

The amplifier was tested and designed for use with our crystal radio kits. The amplifier should work well with other home built crystal radios but was not designed as a general purpose amplifier for mp3 players, phones and the like. There should be a resistor and capacitor across the earphone output of a crystal radio used with this kit. The kit was designed for use with piezoelectric earphones and headphones. The kit has been tested with all the headphones and earphones available on our site.

Note: Not recommended for use with magnetic headphones or earphones.

Note: This kit requires a 9 volt battery not included with kit.

Parts Include In Audio Amplifier Kit 2:
1 - Circuit Board
1 - 100K Variable Resistor With Switch Pre-soldered To Circuit Board
1 - Q1 PN100A Transistor
2 - C1 C2 0.1uf Capacitors (marked 104)
1 - R1 4.7M Resistor (yellow violet green gold)
1 - R2 10K Resistor (brown black orange gold)
4 - 1/2" #4 Screws
17 - 3/8" #4 Screws
17 - #4 Washers
30 - #4 Nuts
4 - Thumb Nuts
1 - Ceramic Earphone
1 - 9 Volt Battery Clip
1 - Knob
4 - Nylon Feet
2 - ~6 inch wire
1 - Philips Screwdriver
1 - 1/4" Wrench

Audio Amplifier Kit 2 was designed to match our Crystal Radio Kit 5 (sold separately).

The kit contains small parts that may be a choking hazard. Adult supervision is always advised while building the kit.