1 Journeyman 1 month ago Anyone use a Bell & Howell Filmosound amp conversion for guitar? I have two, designed by Dave Robinson, who has done about 50 of these to date. My first one was a model 385, with a 12AX7 preamp tube. This new cabinet will house the second one, and older model 285 with octal preamp. I'm waiting on a Jensen C12N.The cabinet was made by Derrick Bell at Veteran Guitar Cabinets in Trenton, Ontario, about an hour and a half east of Toronto. He does great work.