Special Slide Rules and Calculators

Antenna System & Transmission Line Calculator Issued by Andrew Antennas

This is a quality card calculator with a sliding centre for use by microwave radio and antenna engineers. I used it for several years checking my calculations - although I can't quite remember whether I did the calculations first and then used this computer, or if I used this computer and then did the more accurate calculations. Either way, I always seemed to get the correct answer.