The Amp Garage

After more research I’m pretty sure it is a 300v tap. I asked for a Variac switch type tap when he built it and figured it would be the inter lugs on the HV tap. But based on documentation that looks to be 425/450 so the 300v must be the orange pair for the variac style dropped voltage tap. I’ll val...

I ordered a JTM45 PT from Merren, and it didn’t come with a wiring diagram. I found a diagram somewhere else, but I am unsure what the orange pair is (labeled ‘P’, likely cut off) on the diagrams left wires. What is that for? Primary hookups on the lower right lugs and tap wires, 6.3V heaters on the...