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2 Vintage Raytheon US 6BQ5 tubes tested EL84
2 Vintage Raytheon US 6BQ5 tubes tested EL84
2 Vintage Raytheon US 6BQ5 tubes tested EL84
2 Vintage Raytheon US 6BQ5 tubes tested EL84
2 Vintage Raytheon US 6BQ5 tubes tested EL84
2 Vintage Raytheon US 6BQ5 tubes tested EL84
2 Vintage Raytheon US 6BQ5 tubes tested EL84
2 Vintage Raytheon US 6BQ5 tubes tested EL84
2 Vintage Raytheon US 6BQ5 tubes tested EL84
2 Vintage Raytheon US 6BQ5 tubes tested EL84
2 Vintage Raytheon US 6BQ5 tubes tested EL84
2 Vintage Raytheon US 6BQ5 tubes tested EL84

2 Vintage Raytheon US 6BQ5 tubes tested EL84

$ 15.84

  • Brand: Raytheon
  • Country/Region of Manufacture: United States
  • MPN: Does Not Apply
  • Model: EL84
  • Seller Notes: “previously owned.”
  • Type: Vacuum Tube
  • UPC: Does not apply
  • gtin13: Does not apply

Description

Two (EL84) 6BQ5 power tubes, Mfg. by Raytheon Varying degrees of print wear one branded for Motorola with red text one yellow-text Uniline sub-line, with "AU" etched code as is sometimes seen on desirable Raytheon tubes replacement boxes (Shield Co.) included as seen in some pics Tubes are tested on a B&K 707 mutual conductance tube tester recently serviced and calibrated by Mike Mabry in Woodland, WA. Mike has been working on this series of testers for many years. The tube tested as follows, for each side, where the first number is a scaled Gm and the parenthetical number is life rating; a Gm rating of approx. 66 or higher is considered "good": yellow : 87 (82) red: 85 (81) The test ratings on this type of B&K tester may require a bit of explanation. Their "life test" is considered "good" if the meter rating is within 25% of the Gm rating. e.g., a tube with a mutual conductance (scaled) rating of 80 would still be passable if the life test registered a 60 on the meter. Most of their test settings correspond with a 0-120 scaled reading where the "good" area is about 66 and higher on the meter. If you want to combine tubes for a shipping discount, this is possible if you wait for an invoice before paying for any winnings. THANK YOU for looking!