Found my second (vintage) tuner on my local Craigslist, a Realistic STA100 the seller thinks is brand new/never used. It didn't come in the original box but otherwise appears unused. Works great, and is replacing a pretty tired Sanyo JCX2400K that needs some love, whose tuner needs an alignment and whose left channel cuts in and out. (Any suggestions on how to go about restoring that thing? I'd love to hear them!) Any ideas how old this might be? My estimate is early '80s, with the primitive red LEDs but the style looks rather '80s. Also, how common are the STA100s? How many watts per channel?