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Tube Amp Doctor - EL34-SVT Premium - Power Tubes

SKU: RT251

$199.00$179.00

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PRODUCT INFORMATION
CUSTOMER REVIEWS
PRODUCT INFORMATION

Legendary winged "C" selected from the original Svetlana production

The Svetlana EL34 is very dependable and our recommended choice for combos. It has little less power, but therefor a nicely balanced tone with fine heights, very detailed and musical mids and just the right amount of bass. This tube is another example where our TAD burn-in and matching processes optimize the sound potential of any tube: the clear and lively tone and its three-dimensional character that can be achieved with matched TAD tubes speaks for itself.

The TAD EL34-SVT is identical to the stock tube used by Marshall for the JCM2000 TSL/DSL series. It is the only EL34 version that we do recommend for these amp models.

 

Q: When does a power tube become a Premium Selected power tube?

A: All power tubes labeled Premium Selected have passed the following tests:

  • Plate Current (PC) and Amplification (TC)
  • Low Noise Test
  • Microphonic Test
  • Sonic Tests
  • Shock Tests
  • Listening Tests
  • Shorts & Leakage Tests

 

Premium RT-Matching of Power Tubes

Our Premium Matching is an exact matching of power tubes with identical Plate Current (PC) and Transconductance (TC).

TAD Premium Selected tubes are guaranteed for a period of 6 months (according to terms of warranties) for the quality criteria mentioned above.

RohS Compliant

 

Specifications:

Electrical

Heater:

  • Voltage (AC or DC) - 5.7V(min), 6.3V(nom.), 6.9V(max)
  • Current - 1.6A

Cathode: oxide-coated, unipotential

cathode-to-heater potential, max - 100V

Direct interelectrode capacitances, max*** -

  • Grid no.1 to cathode and grid no.3, and grid no.2 - bass sleeve and heater <16pF
  • Plate to Cathode and grid no.3, grid no.2 - Bass sleeve and heater <0.6pF / grid no.1 <1.1pF

Mechanical

  • Operating position - Any
  • Base - octal, 8-pin
  • Dimensions - 113mm (height), 98mm (seated height), 32mm (diameter)
  • Cooling - Convection
  • Approximate net weight - 60g

AF Power Amplifier

Maximum Ratings

  • DC plate voltage - 800V
  • Grid no.2 DC (screen) voltage - 500V
  • Grid no.1 (control) voltage - -100V
  • DC Cathode current - 150mA
  • Plate dissipation - 25W
  • Grid no.2 DC (screen) dissipation - 8W
  • Bulb Temperature (surface hottest point) - 250 degrees celcius

Typical Operation

AF Power Amplifier, Class A1 (single tube)

  • Plate Voltage - 250V
  • Grid 2 screen voltage - 250V
  • Grid 1 control voltage* - -14V
  • Peak AF Grid 1 control voltage - 14V
  • Zero signal plate current - 100mA
  • Maximum signal plate current - 105mA
  • Zero signal grid 2 screen current (avg) - 15mA
  • Transconductance (nominal) - ca 9,500 mS
  • Load resistance - 2000 Ohms
  • Output power at 5% distortion - 10W
CUSTOMER REVIEWS