7C5

Name: 7C5
Brand: Sylvania

Beam Tetrode — Loctal

SylvaniaData: HighHigh quality — base, heater, all universal parameters present, and ≥50% of desirable parameters filled in. Safe to use for design decisions.

↗ TDSL ↗ Radiomuseum

Known Equivalents & Substitutes

CV885

Similar Tubes (Not Drop-In Compatible)

6AQ5

Electrically similar beam tetrode but miniature B7G base — not pin-compatible

6V6

Electrically identical but Octal base — not compatible with Loctal sockets

6V6GT

Electrically identical but Octal base — not compatible with Loctal sockets

Electrical Specifications

Absolute Maximum

Anode Voltage (max)Anode Voltage (max)315V

Screen Voltage (max)Screen Voltage (max)285V

Anode Dissipation (max)Anode Dissipation (max)12W

Screen Dissipation (max)Screen Dissipation (max)2.2W

Cathode Current (max)

Notes

Loctal (lock-in) base — the 8-pin base has a metal locking ring. Not compatible with Octal or Noval sockets.
Electrically identical to the 6V6/6V6GT — same operating conditions, same output power.
GE Essential Characteristics: Pa_max 12 W, Va_max 315 V, Vs_max 285 V, Va(typ) 315V (or 250V), Vs(typ) 225V, Vg=-13V, Ia=34mA, Is=2.2mA, gm=3750, Rp=77000, Pout=5.5W.
Brans Vademecum lists CV885 as the British military equivalent.
Sams lists EL22, KT81, PCF86 as substitutes — verify compatibility.
Raytheon data confirms: Va=250V, Vs=225V, Vg=-13V, Ia=34mA, gm=3750, Rp=77000, Pout=5.5W, rl=8500.

Pin Layout — Loctal

1No Connection

2Heater

3Anode (Plate)

4

References