This was a construction article published in MR in either 1985/86. CONSTRUCTION BY KEITH GUITERRAZ. Anybody (old timers) remember it? I have the article somewhere AND the units. I know the units are for indoor use BUT I may have a go at sorting them out for garden use (reed switches/magnets/speakers). I have always considered this one of the best I have heard (including the modern types). The big trouble is…finding an essential backup chip that was used…it was one of quite a few…a Hammond organ music chip (!). Got something similar from Hammond as a spare . . . but not the one originally used. Time will tell if the original goes up the spout and the spare is used…so to speak. At least I may be able to get the digital prog out of the original chip and try poking it into another similar type (if I can find a blank).
Happy Holidays and Happy Highballing!