I just picked up a used 2466 Head. I noticed its a bit difficult getting the guitar cable in the input. I also noticed the little black plastic washer behind the chrome nut is missing. Any advice on making it easier to insert the cable? And, Anyone know which jack I need to order for replacement? Th...

I'm getting a hum and here is the setup. I've been playing with two amps for years. I just recently picked up a Marshall Vintage/Modern. When I plug in the two amp setup with the Marshall, I get this loud hum. I swapped out the Marshall for another amp....NO HUM. What's up with this? I've checked al...