byoungplumbing(at)gmail.c Guest
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Posted: Sun Feb 26, 2017 10:15 am Post subject: Full wave rectifier |
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If you are considering installing a full wave rectifier (fwr). First check the voltage output of the power source. Then find a fwr that has a higher voltage rating. The fwr will have 4 connections , one marked (+) one (-) , the other two will be marked ac , input, or (~) .... Connect the two ~ to the lighting coil. Connect the + - to a capacitor , if it is an electrolytic capacitor be careful to match the + - on the cap and also the fwr. With the engine running, check the output voltage. If it is within the tachs input range, Then connect this combination to the tach. When the engine is running there will be power to the tach and you will be counting hours. You can do it with a single diode but the output voltage won't be as steady. But a larger capacitor will help with that.
Most tachs have a fairly big voltage range for proper operation. But it is always best to check.
Boyd Young
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