The Dynavector may have a suitable output allowing it to be used with the little wooden-cased Grado phono preamp, which runs off of a 9v battery, and whose sound is well-regarded (I haven't heard it myself). This is a simple-to-use unit, and the battery should last a long time if you only listen occasionally. You might try calling Bob at The Elusive Disc, whose advice I've always found to be trustworthy, to ask if this (or something else) would be a good match. Whenever you're talking about buying phono equipment, it can be very difficult or impossible to actually audition your options, so it is usually helpful to find an experienced professional you can depend on for your information.
