Wednesday 31 July 2013

Simple RF signal meter with LEDs

The simple but effective circuit presented here converts an RF input signal into a visible LED indication. Only discrete components are used. The circuit can be used as field strength analyser or RF Wattmeter when a 50 ohms resistor is connected between ground and HF (J1). Calibration required. Of course you can add extra LED stages in case you want to extend the range. The second picture shows how the circuit can be build on a very small piece of vero-board.

 

 

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3 comments:

  1. PE4BAS, Bas3 August 2013 at 14:18

    Interessant Ron, werkt dit op HF/VHF/UHF? Wat is de bandbreedte? Of maakt dat niet zoveel uit. Dit is zelfs voor mij eenvoudig te bouwen. Moet toch ook maar eens 100 van die 3904tjes bestellen. 73, Bas

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  2. PA2RF30 December 2013 at 13:18

    Denk dat je met Ge dioden in ieder geval het VHF bereik kunt halen.

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  3. Susan Little11 April 2019 at 01:35

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