Photocell - gas filled - UX-Base (4 pins including 2 thick) - Side-on type having S-1 response - Wavelength of maximum spectral response is 8000 +/- 1000 angstroms - This type makes use of a semicylindrical photocathode, and has a direct interelectrode capacitance of 3 picofarads - Anode-Supply voltage is 90 volts