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TT Matching and Selection

Tube-Town eXtended Matching

The TT XMatching for power tubes is done in house on a computercontrolled Matching & Testing System for tubes. After a burn in periode all powertubes are measured and tested with high plate voltage (e.g. ca. 500 V for EL34).

These parameters are getting measured:

  • Plate current
  • Gm
  • Screen current

Furthermore the tubes are getting tested for:

  • Grid Leakage
  • Gas
  • High screen currents

Preamptubes V1-Selection

All tests are done at ca. 250 V plate voltage.

Tested parameters:

  • Noise min. -75 dbV or better
  • Gain
  • Low Microphonics

Preamptubes Balanced Selection

All tests are done at ca. 250 V plate voltage.

Tested parameters:

  • Noise min. -75 dbV or better
  • Gain
  • Both systems with equal gain (+/- 1%)