My guitarist, Martin Pugh, told me he tried one of the new Ampegs with his guitar. He said, "I kinda think your harp would sound pretty cool through one of these".
After trying it out, I bought one of these Jets several months ago. I LOVE the tone. I would have to say my only disappointment has been the lack of volume before feedback. I am going to try the 12AU7s. I appreciate the tip, Tom. Stan