Rolling Candidates for 8CY7

Compound (multi-section) — Noval

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Target Specs

Base: Noval

Heater: 7.9V / 0.6A

Type: compound

Va250

Vg-3

Ia (Plate current)1.2mA

mu (Amplification factor)68

gm (Transconductance)1.3mA/V

ra (Plate resistance)52,000ohm

Va_max350

Pa max (Plate dissipation)1W

Ik_max35

Rg_max2.2

Cgp (Grid-plate capacitance)1.8pF

Cin1.5

Cout0.3

Pinout (Noval)

a2

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Fit:

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✓ Close — all behavioral params within thresholds, Pa_max ≥ target

✓ Safe — Pa_max ≥ target, some params outside thresholds

⚠ Close, low Pa — params pass but Pa_max < target, safe in lightly-loaded circuits

⚠ Low Pa — Pa_max < target and params outside thresholds, experimental

Percentage diffs shown relative to target. Report generated 2026-04-07.

g1_2

k2

h

a1

g1_1

k1

is