Vacuum Tube - 7025, Electro-Harmonix

Electro-Harmonix
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Vacuum Tube - 7025, Electro-Harmonix

$14.25
In Stock

Electro-Harmonix has released a low noise, low microphonic version of the 12AX7 that meets all specifications required for the tube to be designated 7025. The original 7025 tube was a 12AX7 that was tested and selected for the lowest noise and microphonics for use in the critical first preamp stages of amplifiers where noise and microphonics could be an issue. In order to ensure that the 7025 specification is consistently met, Electro-Harmonix has redesigned the structure of the 12AX7 and has implemented construction techniques to ensure the absolute lowest noise and microphonics possible. In all samples tested, noise and microphonics could not be detected.

"The Electro-Harmonix 7025EH has a mid-range that gives clarity and definition to the sound and a smooth top end for warmth and balance. With these characteristics, along with the exceptionally low noise and low microphonics, the Electro-Harmonix 7025EH will work equally well in vintage and modern high-gain guitar amplifiers, as well as sensitive phono preamps." -EHX

SKU:
T-7025-EH
Item ID:
043676
UPC/EAN:
683274026091
Brand:
Electro-Harmonix
Product Measurements by Type
BaseNoval
Base to Shoulder Height40mm ±2.5mm
Diameter22.5mm
Envelope Height49.5mm
Max Amplification Factor (filament 6.3V, plate 250V, grid -2V, grid resistance 1MΩ)110
Max Cathode Current10mA
Max Cathodes-Heater Voltage±200V
Max Filament Voltage Parallel6.6V
Max Filament Voltage Series13.2V
Max Grid Back Current (filament 6.3V, plate 250V, grid -2V, grid resistance 1MΩ)0.2mA
Max Grid Resistance per Triode Fixed Bias1MΩ
Max Grid Resistance per Triode Self Bias2.2MΩ
Max Heater Current 6.3V370mA
Max Heater Current 12.6V185mA
Max Plate Current (filament 6.3V, plate 250V, grid -2V, grid resistance 1MΩ)2mA
Max Plate Current Difference between triodes (filament 6.3V, plate 250V, grid -2V, grid resistance 1MΩ)±40%
Max Plate Dissipation per triode1W
Max Plate Voltage300V
Max Temperature at most heated part of envelope368
Min Amplification Factor (filament 6.3V, plate 250V, grid -2V, grid resistance 1MΩ)81
Min Cathode-Heater insulation resistance (filament 6.3V, cathode-heater voltage ±200V)20MΩ
Min Heater Current 6.3V325mA
Min Heater Current 12.6V162mA
Min Plate Current (filament 6.3V, plate 250V, grid -2V, grid resistance 1MΩ)0.75mA
Min Slope of characteristic (filament 6.3V, plate 250V, grid -2V, grid resistance 1MΩ)1.1mA/V
Nominal Heater Current 6.3V347mA
Nominal Heater Current 12.6V173mA
Total Height56.5mm
Packaging Information
Packaging Dimensions2.815 in. × 1.025 in. × 1.025 in.
Weight (Packaging)0.04 lbs.
JPEG: DatasheetAll Models

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