4 SUPER MATCHED Quad 1960s Amperex Hammond EL84 6BQ5 TEST STRONG 87-97% NEW NOS

Description

4-Piece SUPER MATCHED Quad of 1962-63 Vintage Amperex made for Hammond EL84 / 6BQ5 Power tubes.  All 4 tubes were made in Holland with acid-etched codes that read: "rx4 Delta"xxx".  They all feature grey plates with "Halo" getters.  CLEAN tubes with nice straight pins.  Test STRONG with VERY CLOSE plate current (mA) readings which are the only true way to match power tubes.  Results:
TUBE 1:   9,870 mhos (87%)  /  42.1 mA
TUBE 2:   10,980 mhos (97%)  /  42.4 mA
TUBE 3:   10,550 mhos (93%)  /  43.9 mA
TUBE 4:   10,350 mhos (92%)  /  44.9 mA
Average NEW / NOS spec for this type is 11,300 mhos (100%) / 48.0 mA.  Comprehensive computer-generated results sheets included!
A little bit about me and my valve testing business.....    I started in the tube business as a small hobby in 2012 testing and selling a few small radio tubes.  Now it has turned into a big hobby as I have sold 1000's and 1,000's of tubes to many happy customers.  I personally inspect and fully test each tube and offer a 30-day unconditional 100% guarantee on all my tested tubes.  I am not a store or full-time business, but I take great pride and care in what I do, and your satisfaction is my number one goal.
I have two of the best tube testers ever made that I use to fully test tubes.  The Amplitrex AT-1000 Digital tester and the Triplett 3444 (with digital plate current meter) Tube Analyzer are both mutual conductance testers that can test just about any tube ever made between the two of them and can test for shorts/leakage, noise, gas, emissions, and transconductance.
I have an extensive back stock of tubes, so if you have a certain brand or type you are looking for, feel free to contact me.  Thank you for choosing Valves-Tubes!