fantastic synth the sh-7 (1978) much more powerful of the system 100 model 101 (1976) in the picture!
sys 100 was the preferred machine for heaven 17, human league (being boiled), throbbing gristle
I’m repairing this one: the filter is currently dead 
sh-7 had a lot of features, but it didn’t sound that great. ppl say the sh-5 sounded better. I got mine used in like 1979 for $400. Sold it not working in 2010 for $700. I put a ton of patch points into it so I could patch extra modules into it. Used that setup a ton!
repaired ! (2 tantalum caps dead: c319 and c320)
(generally are the ARP dead because of tantalums 
)
Proper