1. Introduction
If you’re working with vintage or custom vehicles, you’ve likely encountered frustrating signal compatibility issues between senders and gauges. The Bolec DB1-128 Signal Amplifier and Divider is designed to solve exactly that. Compact, robust, and engineered for 12V or 24V systems, this device amplifies weak input signals and allows you to divide the frequency output by selectable factors, ensuring compatibility with your tachometer or speedometer.
2. How to Use It
The DB1-128 is perfect for applications where the signal source (like a magnetic pickup or alternator tap) is either too weak or not properly matched to the input requirements of a gauge or ECU. Simply connect the signal wire to the input terminal, configure your desired division ratio using the DIP switches, and wire the output to your instrument.
It supports division settings from 1x to 128x, making it especially useful for matching sender pulse rates to gauge requirements. Whether you’re setting up a marine engine, industrial generator, or retrofitting a dashboard cluster, this tool provides the accuracy and flexibility needed.
3. Interesting Application – Reviving a Classic Car Dashboard
Many classic cars suffer from failing mechanical tachometers or legacy senders that are no longer available. Enthusiasts often install aftermarket digital tachos—but they don’t always match the original signal profile. Enter the DB1-128.
One example involved a 1974 Bedford truck restoration. The original tacho drive from the alternator was no longer functional. A magnetic pickup was installed at the crankshaft pulley, but the digital tachometer needed a much lower frequency input. With the DB1-128, the raw signal was amplified and divided to match the expected frequency, allowing the use of a modern tacho with vintage aesthetics.
For restorers, retrofitters, and modders alike, the DB1-128 is a vital bridge between old-world machinery and new-world instrumentation.
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