EFP60 (ETC) Secondary Emission Amplifier EFP60 - Secondary Emission Amplifier Almost certainly Philips EFP60 was the first high-frequency amplifier based upon the secondary emission effect. T (16 views)
EFP60 (Philips) Secondary Emission Pentode page 1 2 3 4 5 6 EFP60 sheet 1 2 A B C FP date 1948.10.06 1948.10.06 1949.01.25 1949.01.25 1949.01.25 1999.07.04 (10 views)
