Silver Mica 750 pF

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.

4 tubes, matched as quad

JJ EL84 / 6BQ5 Red Label

Files:

• Datasheet

• Type: Film trimmers
•   horizontal, 240°
• Power Rating: 0,1 W linear
• Voltage Rating: max. 200 VDC
• Ø: 10,3 mm

Wall thickness max: 1,6 mm
Cable diameter: 5,6 - 6,2 mm
Material: PA 6.6, UL 94 V-2
Color: black
Operating temperatures: –35 to +105 °C

Carbon Composition Resistors

• Specification: ½ Watt, axial
• Temperature Range: -55°C to +125°C
• Tolerance: 10%
• Max. Operating Voltage: 350 V
• Size: l=9.5 mm, d=3.6 mm

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

Retainer for EL84 / EL844Tubes

Wall thickness max: 1,6 mm
Cable diameter: 8,3 - 9,1 mm
Material: PA 6.6, UL 94 V-2
Color: black
Operating temperatures: –35 to +105 °C

Wall thickness max: 1,6 mm
Cable diameter: 6,4 - 7,4 mm
Material: PA 6.6, UL 94 V-2
Color: black
Operating temperatures: –35 to +105 °C

Resistor Metaloxide 2 Watts

• +/- 5% tolerance
• -55° C to 240° C operating range
• Max 500 V
• Excellent flame retardant coating
• Different manufacturers
• Pack of 5

Please note:
These resistors have a very small form factor:
red: l = 10 mm, d = 3.9 mm
green: l = 11.5 mm, d = 4.5 mm

Mica Capacitors

• Voltage Rating:    500 V
• Tolerance: 5%
• Operating Temperature Range: - 50°C / + 150°C
• Termination Style: radial