Computerized Christmas Lights

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Linear charger for 12 V car batteries

 

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Yamaha Power Amplifier PA-2400

 

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1500 Watt high power amplifier

 

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Tube Amplifiers

 

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Automatic charging of batteries

 

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15 Ampere Adjustable Power Supply

 

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Bird sound generator

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Wu-Meter with LEDs

 

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Ton control circuit

 

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1.5V Tracking Transmitter

 

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LC Meter

 

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6W FM Transmitter 88-108 MHz

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0 -15V / 60mA - 5A Power Supply

 

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Audio-Visual Multiband VLF receiver (3Hz - 300kHz)

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Micro 40 DSB

 

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White Noise Generator

 

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Digital Timer

 

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Charger for sealed lead batteries

 

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RX Superheterodyne SSB multiband

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Ultrasonic Dog Repeller

 

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0V2

 

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RX CW SSB 160 - 10m

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Lead-acid monitor

 

QRP linear amplifier for 14MHz

 

DKM-302

 

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QRP transceiver DSB, 80m

 

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MSD3393LU

CV338H-T42-13В

Power supply, 13.8V / 20A

 

AM transmitter 3MHz

 

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2m radio beacon

 

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ARDF 80m

 

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K174XA2 = TCA440 = A244D: datasheet

2.4 GHz - radio beacon

 

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FM Tx 420-480MHz

 

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Reverberator

 

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Three-band direct conversion receiver

 

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Vintage AAF

 

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Crystal radio

    Most electronics enthusiasts started with this diagram.

    Crystal radios are the simplest type of radio receiver and can be made with a few inexpensive parts, such as a wire for an antenna, a coil of wire, a capacitor, a crystal detector and earphones (>2000 ohms).

Crystal radio made by Radiola (1922)

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