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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!

The JT30 Pages

The JT30 pages have information about Microphones, Playing Harp, Learning Harp and reviews of shows and some news.


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


I’ve been building and repairing harp Mics for 20 years. I have some stock of some of the parts and I sell off some of the stuff at The JT30 Store.

The Old JT30 Blog (occasionally updated)

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
Now I have three pages for harp mics, harp tab and harp amps.


JT30 Microphone on Facebook

A Blues Harp Player’s Guide to Tube Amplifiers

Frequently Asked Harmonica Questions


A Blues Harp Player’s Guide to Tube Amplifiers


Usenet Articles


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