Boy Scouts Handbook / The First Edition, 1911

by Boy Scouts of America

4. A variable condenser of about 5-10 plates.

5. A fixed condenser so arranged that its capacity can be changed if desired.

With these instruments the receiving set is complete, so we next take up the sending apparatus.

1. A two-inch induction coil.

2. A heavy spark gap (zinc preferable).

3. One wireless key with heavy contacts.

4. A plate condenser which can be easily made by any scout. Good glass is the main point.

5. A triple pole, double throw aerial switch. (Can be made by scouts.)

Now you have everything necessary to go ahead and assemble your station. The next thing is to connect them up.

Above is a diagram which will make a good station for a scout. This station, if the aero is of the proper height, is capable of sending messages from 8 to 10 miles.