Hi, WY3X! I bought a Courier Port-a-Lab 500 in Arkansas while on USAF active duty in 1973, and still have the 2-page instructions. I will try to scan them and send them to you. Would you please provide an e-mail address to which I could send them? Thanks! -- John / KK4FUU (new
Tech) / e-mail
waskliwabit@earthlink.net