I have developed characterization tables for 8877 3cx5000 3cx10000 3cx15000 families. Tables include input/output impedance versus frequency versus Grid and Anode Current (in 50KHz steps) at various power levels from 1% to 100% in 15% power step. All in GG mode. Sept 10 2002 we will release the GK tables. Price per table is $10K. We will characterize YOUR tube for $20K. Alex