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Posts tagged 측광

Schematic diagram for a broadband QRP SWR metering circuit and SSB TRANSCEIVER 80M / 40M boster filter IF Radio

A schematic diagram for a broadband QRP SWR metering circuit for use in a QRP antenna tuner. One could simply hold a momentary DPDT switch down and watch the LED while tuning the capacitors of the antenna tuner for minimum or zero light.

Low-cut and Bass controls 40W Amplifier circuit diagram using MJ11016, MJ11015

Low-cut and Bass controls 40W Amplifier circuit diagram using MJ11016, MJ11015 Low-cut and Bass controls Output power: 40W on 8 Ohm and 60W on 4 Ohm loads parts: R1 6K8 1W R2,R4 470R 1/4W R3 2K 1/2W R5,R6 4K7 1/2W R7 220R 1/2W R8 2K2 1/2W R9 50K 1/2W R10 68K 1/4W R11,R12 R47 4W […]

Stereo Audio Amplifiers

Stereo Audio Amplifiers circuit using stk439 Stereo Audio Amplifiers circuit using stk439 Stereo Audio Amplifiers R 1 ……….. 2 K 2 R 2,4 ……… 220 K R 3 ……….. 390 K R 5 ……….. 100 R 6 ……….. 120 R 7 ……….. 12 K R 8 ……….. 10 C 1 ……….. 470 pF C 2 […]

Digital Tester circuit

Digital Tester circuit with LM324

Tube amp Circuit

Tube Amplifier Circuit Diagram

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