k310 is both the Koechel number of a great Mozart piano sonata, but the office number I had at Itek Optical Systems in Lexington, MA, now something else.

When I was crazy interested in ham radio as a kid, I didn't have enough money to buy or build any gear. I'd buy schematics and build stuff in my mind, which may account for some quirks, but they're almost entirely good quirks, which is why I am posting to help others, with problems way bigger than my own. Thanks for asking!