I just won an old fashioned Altec slide rule calculator on ebay. It gives voltage and current for watts or any combination of the three. Pretty cool piece of Altec gear that an audio engineer would have used back in the day. I wound up paying 15.50 plus 2.50 shipping. It started at 12.50, so who was the Altec fan that bid me up at the last minute? You owe me 3 bucks! LOL

BillWojo