Hey DjC, I suspect MJMP will be able to tell you ? yours is a later unit than both of mine, 240v model is 803570 and US model is 811390. Both of mine are top switch v1 (hardware) models. What EPROMS are in them isn't relevant really (to the longitude oops sorry, longevity problem (mmm we need to build a (very accurate) wooden clock (for those who get the oblique reference..LoL)).
Question, when ADA released the MP1 without top switch ie V2 hardware ?? (and did this also include dropping the rear jack line input to be inst level ?) and what EPROM version was in them (I'm guessing 2.0
). The 2.01 EPROM was the last EPROM (firmware) update ADA issued.
But DjC, if I put a 1.38 EPROM in the last MP1 ADA made, it would work fine, would you call that a 1.38 version ? and really what would that mean ? Since the goal here (as I understand it) is to get the latest (youngest MP1s) possible. However, it seems to me (based on experience (personal and though the depot) that it more depends on how the unit has been treated (used, looked after etc). And realising (as I'm sure you're across) that these units are getting on and some electronics wear out (after 25+ years pumping it out
). Seems to me, getting a decent unit that has no major dilemmas and upgrading everything you can (and that's quite a few things) should (as SC said) give you another 15 years ish of reliable performance (regardless of the EPROM version (not saying don't put in the 2.01 EPROM but it doesn't directly version your MP1 (although "can" be indicative))).