The Original JT30 Page

The Astatic JT-30 microphone is the perfect Harmonica mic for use with a vintage tube amps. It was created about 70 years ago and went out of production around the year 1999. These pages are devoted to enjoying, playing and learning Amplified Blues Harmonica, so the name JT30 is appropriate. Today there are many cool harp microphones. In the long run, it’s not the mic that counts, it’s what’s in your heart!

Street Theory

A Harp Player’s Guide to Music Theory

Learning Harp

Picking Up Blues Harp

A guide to learning to play Blues Harp

Microphone Information

More JT30 Stuff

History of this page.

In the dawn of the World Wide Web (1994), harp player Keith Graham created the JT30 page. It started out as a home page for modifying JT30 microphones. Eventually the page became a catchall for microphones and amplified harmonica playing. You can see these pages at:
The Original JT30 Page
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A Blues Harp Player’s Guide to Tube Amplifiers

Usenet Articles

For many years a kept a Blues Harp blog. There are lots of pictures and stories here:Keith's Blues Harp Blog