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Posts tagged QRP

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.

Power Supply soft start

How to start power supply ? and slow start power supply ? Power Supply soft start Circuit diagram design How to start power supply ? and slow start power supply ?

What device is used to check capacitors in electronic circuits?

anuraganimax asked: How can I check whether or not a capacitor is faulty?

Simple Police Car Siren

Simple Police Car Siren using 9013, 9012 R1 ………….. 27K ohm R2 ………….. 68K ohm R3 ………….. 56K ohm R4 ………….. 470 ohm C1 ………….. 50uF – 12V C2 ………….. 0,018uF – 25V TR1 …………. FCS9013 TR2 …………. FCS9012 S1 ………….. Push Switch

Engine Wiring Harness – Automotive Wiring and Electrical Systems

Engine Wiring Harness – Automotive Wiring and Electrical Systems

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