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RS242

History:
Sep/23 ∼ Sep/24 : Stradi RS241
Sep/24 ∼ :  Stradi RS241 ->  Stradi RS242 (The model name is changed)

Summary:
The Stradi RS242 tube is compatible with Telefunken's RS242 tube.
With our RS242, you can fully focus on music without thinking of microphonics in DHT Phono Amp or DHT PreAmp.


The RS242 tube is a low-power output transmitting tube developed by Telefunken.
It was mainly used in industrial fields such as telecommunication but it is now regarded as a vacuum tube for audio as more and more people make amplifiers with RS242 tubes.

The Stradi RS242 tube is compatible with Telefunken's RS242 tube.
The Telefunken RS242 uses an oxide-coated filament and the Stradi RS242 is the same.

After our long-term test, we concluded that the Stradi RS242 tube is suitable for use with an output stage but is also very good for use with a drive and voltage amplification stage.

The Stradi RS242 tube is extremely suppressed in generating microphonics, which is the biggest problem when using a direct heating tube.
If you use the Stradi RS242 tube, you can fully focus on music without thinking of microphonics in DHT Phono Amp or DHT PreAmp, which was previously considered impossible to use.

Available in matched pairs, quad sets, and singles.

  • Availability In Stock
  • Lead Time 3 ~ 14 days
  • Price$280.00
FEATURES

  • Ladder type Frame Grid
  • Material of minimizing filament end-loss
  • Anti-microphonic structure
  • Electrophoresis filament coating
  • Dual Getters
  • Eco-friendly paper packaging


FILAMENT RATINGS

  • Filament Voltage : 4 Volt (AC or DC)
  • Tolerance on filament voltage : +-2.5 %
  • Filament Current : 0.77 Ampere


MAXIMUM RATINGS

  • Maximum Anode Voltage : 400V
  • Maximum Anode Dissipation : 12Watt
  • Maximum Anode Current : 40mA


RECOMMENDED SINGLE ENDED OPERATING POINTS

  • Anode Supply Voltage : 300V
  • Grid Voltage : -7V
  • Anode Current : 18mA
  • Transconductance : 3500 µmhos
  • Anode Resistance : 4800 Ω
  • Amplification factor : 17


TUBE CURVES


DIMENSIONS & BASE