Vacuum Tube - EF86, Electro-Harmonix

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Vacuum Tube - EF86, Electro-Harmonix

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Originally: $18.75
In stock

Electro-Harmonix EF86 pentode preamp tube. Made in Russia.

Item ID:
Product Measurements
Amplification Factor38
Body Height49.2 mm
Capacitance, Grid to Heater0.0025 pF
Capacitance, Grid to Others3.8 pF
Capacitance, Plate to Grid0.05 pF
Capacitance, Plate to Others5.1 pF
Cathode Current (Ik)6 mA
Cathode to Heater Voltage, Negative50 V
Cathode to Heater Voltage, Positive100 V
Grid 1 Voltage-2.2 V typical
Grid 2 Voltage≤ 200 V, 140 V typical
Grid Circuit Resistance (Rg), Current Bias22 MΩ
Grid Circuit Resistance (Rg), Fixed Bias10 MΩ
Heater Current200 mA
Heater Voltage6.3 V
Internal Resistance (Ri)2.5 MΩ
Item Diameter22.2 mm
Item Height55.6 mm
Plate Voltage (Ua)≤ 300 V, 250 V typical
Transconductance (S)2.2 mA/V
Packaging Information
Packaging Dimensions2.75 in. × 1 in. × 1 in.
Weight (Packaging)0.031 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet196.93 KB

Questions and Answers

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Asked by Anonymous on May 4th, 2016.
May 4th, 2016
Staff Member
Top Contributor
These preamp tubes are not graded in this manner and as such we couldn't provide a low medium or high gain rating.
Asked by on September 22nd, 2017.
Matt H
September 26th, 2017
At this time we do not offer matching services for these tubes.

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