I agree. I truly expect that an old battery was left in and it leaked. Clean that up and the test lead sockets may need a bit of attention. Other than that perhaps the zebra connector, fuses, etc. All easily fixable. And like I said, for 20 bucks, What the heck. I was born in 80 into a family electronics business and we had two 75's and a triplet vom, a Doric model 130A cap meter, and an old Hitachi scope and with the acceptation of the scope that I sold I still have it all in working order. Those 75's put up with all manners of my abuse as a 5 to 10 year old before I saw how much they cost! You know, things like trying to read current across the electric forklift battery terminals, and measuring voltage across a Van de Graf generator. Hahahahaha... Memories.... Smashing apart the bad chips and looking at all the gold inside, then throwing that "useless old junk" away!!! I probably threw away several grams of gold over the years if not a solid ounce! We made, and still make Timers for irrigation use and my fathers electro mech designs used 555 timers for timings up to a minute so we had to use low leakage "Timing" capacitors. Mallory used to have "Timing Spec" parts up to 100uf if you can believe that! then the Exar series of 555's with counters on them. I remember a times 10 one, and I think one that counted to 2048 for the longer time selections. I remember calculating RC time constants and if I am not mistaken the 555 fired at 2 time constants. I would have to match caps to resistors to give us whatever we needed as reliable sealed multiturn pots were expensive and dad did not believe in them! Now just run OSC Cal and bang! hahahaha. What 30 years can do! We had a clock motor driving a cogged wheel with punch pins for start times that in turn fired the 555 which ran a motorized wafer switch stack that stepped through the station outputs that each ran for a time determined by an Exar 2242. Total awesomeness that ran forever!
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