At N4700, they'll drift a lot when they get hot. About 14pF/deg C. Rich has warned about this phenomena before with caps with a big temp. co. 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com