The Ramsey PR10, PR20, PR40 - 2 Meter, 220 MHz, 440 MHz Preamp Kits - will improve any receiver with their high gain combined with low noise. See details for different types.
Price: US$14.95
The CanKit CK495 Electret Microphone Pre-Amp Kit incorporates a sensitive PC board mounted electret condenser microphone and two transistors.
Price: US$12.95
The Velleman MK136 Super Stereo Ear Kit is an ultra high gain stereo audio amplifier that boosts audio 50 times and can also be listened to in stereo.
Price: US$11.95
The Velleman K1803 Universal Mono Pre-Amplifier Kit has been developed as pre-module for a number of audio applications where there is insufficient input signal.
Price: US$10.99
