US Fuse 4 A slow blow

4 tubes, matched as quad

Strongly committed to quality manufacturing, Tung-Sol tubes have always been known for their reliability and great tone. Today's new production Tung-Sol tubes are constructed with the same commitment to quality and reliability. Tung-Sol tubes reflect the best in vintage Tung-Sol construction with unsurpassed tone and reliability.

• 2+1 Solder lugs
• lugs brass, tinned

• Type: Aluminum Electrolytic Capacitors
• Capacitance: 220 µF
• Voltage Rating: 350 V
• Tolerance: - 10%+30%
• Operating Temperature Range: - 40°C / + 85 °C
• Dimensions: Ø 25 mm x 38 mm
• Termination Style: axial

• Type: Aluminum Electrolytic Capacitors
• Capacitance: 100 µF
• Voltage Rating: 500 V
• Tolerance: +/- 20%
• Operating Temperature Range: - 40°C / + 85 °C
• Dimensions: Ø 30 mm x 49 mm
• Termination Style: axial

TT Selection: Balanced
Both systems with balanced gain

The Sovtek 12AX7WA is a defacto standard in 12AX7 tubes for many years yet because of its high dependability and its low noise floor.

• Type: Aluminum Electrolytic Capacitors
• Capacitance: 100 µF
• Voltage Rating: 350 V
• Tolerance: +/- 20%
• Operating Temperature Range: - 40°C / + 85 °C
• Dimensions: Ø 18 mm x 37 mm
• Termination Style: axial

TT Selection: Balanced
Both systems with balanced gain

The Sovtek 12AX7WB has more gain and saturation than the Sovtek 12AX7WA. Its warmer, darker sound is preferred by Rivera, VHT, Demeter, and Kendrick, among other manufacturers.

• Type: Tubular Metalized Polyester Film Capacitors
• Voltage Rating: 630 V
• Tolerance: +/- 10%
• Operating Temperature Range: - 40°C / + 85 °C
• Termination Style: axial
• • Non-inductive
  • Self healing windings.
  • Similar to the Mallorys 150-Series

Mallory Type 150 is a general purpose capacitor for use in blocking, bypass, decoupling, smoothing and some timing applications.

• Epoxy end fill meets UL94V-0
• Non inductively wound
• Flame retardant outer wrap meets UL510
• Non polar

Specifications:

• Operating Tempeature Range: –55 ºC to +125 ºC (derate linearly to 50% rated voltage at 125 ºC)
• Dielectric Withstand Voltage: .6 x rated voltage for 2 s @ +25 ºC ±5 ºC
• Dissipation Factor (DF): tgd x 10–4 at +25 ºC ±5 ºC
• Insulation Resistance: 10,000 MO x µF, 30,000 MO Min.
• Self Inductance: 1 nH max. per 1 mm lead and body length
• Life Test: 1000 hrs @ 85 ºC 1.25 x Vn
• Damp Heat Test: 95% RH @ +45 ºC for 21 days
• Soldering: 260 ºC ±5 ºC for 10 s ±1 s
• Long Term Storage Stability: ?C/C = ±3% after 2 years