A hundred years ago this month, the September 1922 issue of Popular Mechanics showed how to make this radio transmitter. According to the author, F.L. Brittin, the set was capable of distances of up to 16 miles, and relied upon an automobile ignition coil to generate the high voltage for the spark. It was small enough to put in a small suitcase, and “well adjusted to the needs of outers in motor cars or boats, and for boy-scout field work.”

If parts were bought new, the cost was about $15, but by using materials commonly available around the shop, this could be reduced.

The magazine reminded readers that a license was necessary before transmitting, and full details could be obtained from the radio inspector in the builder’s district.

Some links on this site are affiliate links, meaning that this site earns a small commission if you make a purchase after using the link.