1. This is me at my mini lathe making a brass radio part.

    Richard

AM Broadcast Loop Antenna

The Loop wires pick up the radio signal from the radio station and you resonate the loop with the variable capacitor and in doing so the signal is amplified in comparison to a random wire or untuned loop antenna. Then this amplified tuned in signal is passed to your radio with the small 1 or 2 turn loop. doing it this way your radio does not interfere with the tuning of the main loop being they are separate. Also you can tune in stations better if you turn the loop broadside to the station if you know where it is. you can sort of find out by slowly turning the loop till the stations is very week or not there, note what direction the side of the loop is pointing and that's where the station is on one or the other of the broadsides of the loop antenna. so now turn you loop 90 degrees and you have the best position for that station you want.

AM Transmitter

The Look

Designed to look good with your antique radio and really fit it with it all. can be placed on another radio or even on the floor if you want. also the base is removeable.

AM Transmitter

The Controls

The black knob is the variable capacitor so you can tune in your station.

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The Base

Box is made of shop plywood and covered in American wallnut vaneer. Cord on the left goes to your radio and is 10 foot long so you can reach a radio a distance away. cord is made of lamp cord and works very well for this purpose because it has around 75 to 100 ohms impedance.

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How it works, the circuit

As you can see in the diagram the main tunable loop does not connect to the radio, the small loop does. This way the main loop remains very tunable. the number of turns is not the same this diagram is for demonstration.

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