Try here: http://www.mif.pg.gda.pl/homepages/frank/sheets/049/9/927.pdf On 2/9/2012 3:52 PM, Randy and Sherry Guttery wrote: > On 2/9/2012 2:48 PM, Bob Jackson wrote: >> GE/RCA tube marked JRC-927. Very small, flat-top round envelope; only 3 pins. Any clues? >> > Photo cell. > -- Al Klase - N3FRQ Jersey City, NJ http://www.skywaves.ar88.net/