Item Tag: Rainbowkits
3 posts
RAINBOWKITS EBST-11 ONE WATT 1W LM1458 LM386 STEREO AUDIO PREAMP AMPLIFIER KIT
One watt stereo audio pre-amplifier and amplifier kit. Based on the LM1458 pre-amplifier and two LM386 low voltage power amplifiers, this kit amplifies a small signal such as a microphone and drives two small speakers or headphone with up to 1W of audio power. The LM386 provides up to 1 watt of low distortion audio power at THD = 0.2% (THD is the total amount of audio distortion) and voltage gain up to 46dB. Includes printed circuit board (PCB), components, and instructions. Specifications: Stereo output power up to 1 W @ THD = 0.2% (THD is the total amount of audio distortion) into an 8 ohm load. This device will operate from 7 to 15 VDC. Voltage gain upto 46dB. PCB Size 2.25" x 2.75" Rainbowkits are intended for advanced-beginners and up. The builder must be able to identify common electrical components and their markings. Minimal skill at soldering is required. All parts are factory tested. Once soldering has begun the kit is not returnable. Visit our eBay store for other radio accessories.
July 4, 2026
RAINBOWKITS EBAP-2 LM1458 STEREO AUDIO MICROPHONE PRE-AMP AMPLIFIER KIT
Rainbowkits are intended for advanced-beginners and up. The builder must be able to identify common electrical components and their markings. Minimal skill at soldering is required. All parts are factory tested.
July 4, 2026
RAINBOWKITS AP-1D LM1458 OPERATIONAL MICROPHONE AUDIO PRE-AMP AMPLIFIER KIT
Microphone audio pre-amplifier kit based on the LM1458 operational amplifier. Adjustable output level. Operates from single 9V battery. Perfect for boosting the level of a microphone to create a "power mic." Includes printed circuit board (PCB), components, and instructions. Specifications: operates from 5 to 9VDC * Distortion 0.2% * Voltage Gain of 10 * PCB Size 1" x 1.95" Rainbowkits are intended for advanced-beginners and up. The builder must be able to identify common electrical components and their markings. Minimal skill at soldering is required. All parts are factory tested. Once soldering has begun the kit is not returnable. Visit our eBay store for other radio accessories.
July 4, 2026