B5 base	B7 base

HF pentode

Introduced: VP4 (B5) 1933, (B7) 1934, VP4A (B4 & B7) 1934, VP4B (B7) 1935

1 2 3 4 5 6 7 tc base g2 g1 f f k,m     a B5 m a g3 f f k g2 g1 B7

Vf Af Va Vs Vg mAa mAs ra gm VP4 4 1 200 100 -2..-22 4.5 1.9 1,000,000 2.3 VP4A 4 1.2 200 100 -2 4.25 1.8 1,400,000 2.5 VP4B 4 0.65 250 250 -3 11.5 4.25   2

5-447, AF2, AS4100, DH204, E447, H4129D, HP4105, HP4106, KL70701S, MT4110, MVSPen, RENS1294, RS4347, T4700, TE47, TF2, VP4, VMP4, W519, WE25