Gus, Don't know. We purchased a rackmount 7704 with a 7A26 and a couple of 7B85s (delaying timebase) for about $200US working. May have also include a 7A22 (differential amplifier, that's a real treasure) but I'm not sure and the guy who knows is out this week. Dave Gus Salavatore Calabrese wrote: > It includes a 7B92A and Two (2) 7A26 modules > > TIA > > > > Gus Salvatore Calabrese 720.222.1309 GSC > www.omegadogs.com Denver, CO > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist