We were interviewed by the Jewish Exponent and featured in today’s edition. Check it out at: http://www.jewishexponent.com/article/26460/FatherDaughter_CoAuthors/ A scan of the printed edition is at: Exponent002
My ongoing eBay search found a number of Perkin Elmer SPCM AQRH-12 units. Two are listed for $499 (buy-it-now) as working, one for $199 as “parts/repair.” I have no connection to seller. eBay auctions: 230835435238, 230835438679, and 320959423052 (parts/repair).