The Hohner Blues Blaster is perhaps the final incarnation of the Astatic JT-30 shell. It comes with a really poor Japanese crystal. I sent this one to Chuck Gurney, who installed my vintage MC-101 Astatic crystal element, rewired the connector, and put on a nicer volume knob. Problem solved! Now it is a killer harp mic with a really great sounding element.
Here it is through a vintage Silvertone 1432 amp hooked together with a Fender Bassman.