sed 6bm8 DATASHEETS

Svetlana 6BM8

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High Performance Audio
Dual Package, Triode and Pentode

he Svetlana™ 6BM8 is a single glass envelope containing both a power pentode and triode.

T

linear configuration are an excellent choice for more power. The 6BM8 is also a great choice as a
driver for higher power tubes, such as the Svetlana SV811 and SV572 series triodes. It has an
indirectly-heated oxide cathode, which may be DC operated for the absolute best hum/noise
performance.

Close manufacturing specification tolerances and improved processing provide enhanced reliability
and superior sonic performance. The high sensitivity of Svetlana 6BM8's is an economical method
to achieve high quality sound with a minimum of components.

The Svetlana 6BM8 is manufactured in the Svetlana factory in Russia, and is designed to be a
direct replacement for any 6BM8 or ECL82.

General Characteristics
Electrical

Heater: Min. Nom. Max.
Voltage (AC or DC) 5.7 6.3 6.9 V
Current 0.78 A
Cathode: Oxide-coated, unipotential
Cathode-to-heater potential, max. 100 V
Direct interelectrode capacitances, max.* Triode Pentode
Grid no. 1 to cathode 2.7 9.3 pF
Plate to cathode 4 8 pF
Grid no.1 to plate 4 0.3 pF

Mechanical

Operating Position Any
Base 9-pin miniature
Socket Svetlana SK-9A or similiar

Basing diagram JEDEC 9EX
Maximum dimensions:
Height 78 mm (3.07 in.)
Seated height 71 mm (2.80 in.)
Diameter 22.2 mm (0.87 in.)
Cooling Convection
Approximate net weight 20 g (0.7 oz.)

*Without external shielding, nominal values

It has a pentode plate dissipation rating of 7 Watts with convection cooling. A single 6BM8
may be used as an economical low power mono block amplifier or a pair of 6BM8's, in ultra

AF Power Amplifier
Average ratings Triode Pentode

DC plate voltage 300 300 V
Grid no.2 DC (screen) voltage – 200 V
Grid no.1 (control) voltage -1.3 -24 V
DC plate current 1.1 40 mA
Grid no.2 DC (screen) current — 8 mA
Amplification Factor 70 9.5 µ
Transconductance 2500 6400 µS
Plate load 150,000 Ohms 7000 Ohms
Output power 1.8 W

22.2 mm

Outline Drawing
6BM8 Triode and Pentode

Svetlana

71 mm

Maximum Ratings Triode Pentode

DC plate voltage 300 600** V
Cathode current 15 50 mA
Grid no.2 voltage — 300 V

Plate resistance — 20,000 Ohms
Plate dissipation 1 7 W

**Maximum peak positive pulse voltage 2500V

Svetlana

ELECTRON DEVICES

Headquarters:
8200 South Memorial Parkway
Huntsville, AL 35802
USA
Phone [phone]
FAX [phone]

www.svetlana.com

Marketing & Engineering:

3000 Alpine Road
Portola Valley, CA 94028
USA
Phone [phone]
FAX [phone]

Made in Russia

Bottom View
9-pin Miniature Base Connections

6BM8

7 mm

8/96

Svetlana 6BM8

High Performance Audio
Dual Package, Triode and Pentode

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Vg=0v

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Svetlana 6BM8 Triode
Typical Characteristics

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Svetlana

ELECTRON DEVICES

PLATE CURRENT (Ip)

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PLATE VOLTS (Vp)

Vg1=0v

Svetlana 6BM8 Pentode

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Typical Characteristics

screen = 100 volts

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PLATE CURRENT (Ip)

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PLATE VOLTAGE (Vp)