Silicon Tube Damper for 12AX7, EL84

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.

TT Selection: Balanced
Both systems with balanced gain

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.

Premium medium-Mu Twin Triode for use in preamplifier.

TT Selection: V1 - Low Noise
This tube is selected for sensitive input stages (V1)

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.

Miniature Signal Relays

• Dimensions: 20.2 x 9.8 x 12.5 mm
• Function: 2 x changeover contacts, DPDT
• Nominal voltage: 12 V/DC
• Nominal load: 1 A - 24 V/DC, 0.5 A - 120 V/AC
• Max. switching voltage: 60 V/DC / 120 V/AC

Files:

• Datasheet

• Type: Aluminum Electrolytic Capacitors
• Capacitance: 15 + 15 µF
• Voltage Rating: 450 V
• Tolerance: +/- 20%
• Operating Temperature Range: - 40°C / + 85 °C
• Dimensions: Ø 25 mm x 39 mm
• Termination Style: axial

• Type: Electrolytic capacitor
• Capacitance: 10 µF
• Voltage Rating: 63 V
• Tolerance: - 10 % / +30 %
• Operating Temperature Range: - 40°C / + 85 °C
• Dimensions: Ø 5 mm x 11 mm
• Termination Style: axial

Images are for reference only. See Product Specifications

• Type: Aluminum Electrolytic Capacitors
• Capacitance: 15 µF
• Voltage Rating: 450 V
• Tolerance: +/- 20%
• Operating Temperature Range: - 40°C / + 85 °C
• Dimensions: Ø 14 mm x 30 mm
• Termination Style: axial

• Type: Electrolytic can capacitor
• Capacitance: 100 µF
• Voltage Rating: 100 V
• Tolerance: - 20 % / +20 %
• Operating Temperature Range: - 40°C / + 105 °C
• Dimensions: Ø 12,5 mm x 21 mm
• Termination Style: radial
• Grid: 5,0

Images are for reference only. See Product Specifications

Sweet and warm sounding preamp tube with high gain. We recommend this tube for guitar/bass amps.

Files:

• Datasheet

• Type: Cancap
• Capacitance: 100 µF
• Voltage Rating: 500 V
• Tolerance: -10 % / +30 %
• Operating Temperature Range: - 25°C / + 70 °C
• Dimensions: Ø 25 mm x 40 mm
• Termination Style: radial, Snap-In mount

• Type: Cancap
• Capacitance: 50 + 50 µF
• Voltage Rating: 500 V
• Tolerance: -10 % / +30 %
• Operating Temperature Range: - 25°C / + 70 °C
• Dimensions: Ø 35,5 mm x 51,4 mm
• Termination Style: radial, solder-lugs

2 tubes, matched as pair

EL34 II has fuller low mids and low end but does not lose headroom in the high end. Stronger than regular JJ EL34 but not as aggressive as the JJ E34L.

Typical Characteristics

• Ua = 250 V
• Ug3 = 0 V
• Ug2 = 265 V
• Ug1 = -13,5 V
• Ia = 100 mA
• Ig2 = 14,9 mA
• S = 11 mA/V
• Ri = 15 kΩ
• μg2/g1 = 11

Limiting Values

• Ua0 = 2000 V
• Ua = 800 V
• Wa(max) = 25 W
• Ug20 = 800 V
• Ug2 = 450 V
• Wg2(max) = 8 W
• Ik = 150 mA
• Uk/f = 100 V
• Rk/f = 20 kΩ

Files:

• Datasheet

Reverb Driver, Fender Style, direct replacement for item 125A20B

• Power: 3,5 W
• 4 Ohm @ 14k5
• 8 Ohm @ 29k