HI all, as far as I'm aware, the manuals are still on the Cubic site. Check this link. http://www.cubic.com/cda1/Prod_&_Serv/techmans/techmans.html The subject though refers to a 3250B, I expect this is different from the 3250 and 3280?? Perhaps an updated version (without the VFD hopefully)? Cheers Greg VK3XYZ