I have three vintage microphones that don't seem to work. Two are Astatic (A T-2 and a T-3) and the third appears to be an Electro-Voice (although that's just on the pot-metal stand, the mic itself as a red K on it).
They all have 1/4" connectors, so they plug into my little Fender Champ 600, but only one of them even makes any clicks or pops when I tap the mic. They certainly don't amplify anything.
Is it a question of impedance matching, or are these old salt crystal microphones just shot? I can't seem to find much online about troubleshooting them.
I'd love to get one of them to work for playing blues harp.