bernard and szpak in u s pat no 4 131 520 issued dec 26 1978 the wet capacitance u03bcf percentage dissipation factor and leakage current u03bca at 70v were measured ten lots using 0 035 inch 0 89 mm diameter wire for the anode body portion were tested for the above parameters table 1______________________________________lot capacitance u03bcf df leakage current u03bca______________________________________1 0 009 1 1 0 092 0 009 1 1 0 003 0 009 1 1 0 004 0 009 1 1 0 025 0 013 1 1 0 096 0 007 1 1 0 007 0 009 1 1 0 018 0 009 1 1 0 129 0 009 1 1 0 0110 0 009 1 1 0 01average 0 009 1 1 0 01______________________________________ cv 0 009 u03bcf u00d7 100 v 0 9 u03bcf v the surface area of the 0 080 inch 2 03 mm long body portion for different diameter wires was calculated and the cv product was predicted for ease of comparison the actual results from example 1 are given table 2______________________________________diameter inch surface area in sup 2 cv product predicted______________________________________0 035 0 01072 0 90 known 0 040 0 01257 1 060 045 0 01449 1 220 050 0 01649 1 380 055 0 01858 1 56______________________________________ another lot of units was made using 0 050 inch 1 27 mm diameter wire and sintered and anodized as above again capacitance dissipation factor and leakage current were measured table 3______________________________________lot capacitance u03bcf df leakage current u03bca______________________________________1 0 014 1 8 0 032 0 013 1 8 0 033 0 014 1 7 0.