In a message dated 97-02-13 02:57:10 EST, you write: << Does anyone know if this would make an okay transformer for use with vacuum tube coil? Thanks in advance, Brad >> 15,000 V wont hold an arc anywhere near 6" and a microwave transformer is only 2KV, usual average give or take 500V. Im not saying youre wrong but are you sure its a microwave unit? 6" arc with any amount of amperage at all is a lot of jazz. Stephen Sanders