Retro Phone Horn Microphone

Converting vintage rotary phone horns into lo-fi microphones.

Two vintage rotary dial telephones. Left: 1950's Bakelite Ericsson model. Right: PTT model T65.

Rear of the telephones revealing 1/4 inch audio jacks for connecting to standard line level audio equipment.

Microphone conversion

The rotary dial telephone horn contains two elements: A speaker and a microphone. Both can actually work as a microphone, each with their own characteristic sound. The following conversion guide was used.

Telephone Microphone To XLR Conversion – www.kaper.com