3 Amperex EL84 6BQ5 factory matched trio rX3 X9D Sittard Holland audio tubes


 You are buying 3 tubes, genuine 6BQ5-EL84, made by Amperex and OEM branded as "Motorola GOLDEN Premium Rated", gray plate with 3 slots, D-style getter, very rare inventory manufactured in Sittard Holland factory, code "rX3 X9D" on each tube.

A new white box will be supplied with each tube.

Tested electrically matched for Gm and plate current:

Tube #1:
  • 7000 micromhos @ 28ma plate current

Tube #2:

  • 7250 micromhos @ 27ma plate current

Tube #3:

  • 7000 micromhos @ 26ma plate current

All three tubes:

  • no shorts or leakage
  • testing performed on our calibrated Hickok 752A mutual conductance tube tester. 
  • photos show all 3 tubes being tested


Hickok 752A test parameters for 6BQ5:
  • signal voltage 500mV ac, meter scale X10, min good is 4750 micromhos. 

[INV2]