6158

Brimar 6158 (CV4068) rugged low-microphonic medium-mu dual triode for stable DC amplification and Class B push-pull audio, with series/parallel heater.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 600 mA

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: 6.3 V
Nominal heater current: 600 mA
Parallel heater voltage: 6.3 V
Parallel heater current: 600 mA
Series capable: Yes

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 0

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 14000 Ω
Transconductance: 0.00235 S
Amplification factor: 32
Max plate voltage: 300 V
Max plate dissipation: 5 W
Max cathode current: 35 mA

Brimar 6158 CV4068 physical triode section 1. Max plate 300 V, plate dissipation 5 W, cathode current 35 mA, negative grid 75 V magnitude, average grid current 7 mA. Zero-current plate 500 V is separate rating. At Va 250 V Vg -4.6 V: Ia 6 mA typ (3.5–8.5), mu 32 typ (27–37), gm 0.00235 A/V typ (0.0017–0.0030), rp 14000 Ω typ. Input C 2.2 pF, output 2.0 pF, Cgp 1.9 pF, Chk 4.9 pF. Push-pull pair Class B 6.7 W output combined, not per section.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 14000 Ω
Transconductance: 0.00235 S
Amplification factor: 32
Max plate voltage: 300 V
Max plate dissipation: 5 W
Max cathode current: 35 mA

Brimar 6158 CV4068 physical triode section 2. Max plate 300 V, plate dissipation 5 W, cathode current 35 mA, negative grid 75 V magnitude, average grid current 7 mA. Zero-current plate 500 V is separate rating. At Va 250 V Vg -4.6 V: Ia 6 mA typ (3.5–8.5), mu 32 typ (27–37), gm 0.00235 A/V typ (0.0017–0.0030), rp 14000 Ω typ. Input C 2.2 pF, output 2.0 pF, Cgp 1.9 pF, Chk 4.9 pF. Push-pull pair Class B 6.7 W output combined, not per section.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

9999 Mixed G 2000

Published operating points and test conditions from this source.

SECTION 0

Triode

Other

Maximum plate voltage
300 V
Maximum plate voltage section 1
Heater/filament voltage
6.3 V
Parallel heater voltage
Heater/filament current
600 mA
Parallel heater current

SECTION 1

Triode

Other

Maximum plate voltage
300 V
Maximum plate voltage section 2
Heater/filament voltage
12.6 V
Series heater voltage
Heater/filament current
300 mA
Series heater current