Art, Just happen to have that handy: 811a demensions (Inches) Diameter: 2.23 Base to plate cap: 5.88 Overall Height 6.52 Doug -- W4DXV -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com Search: http://www.contesting.com/km9p/search.htm