2-Piece Lot Pair of RCA Cunningham 2A3 Power tubes.  Both tubes are identical in construction and feature MONO / Single BLACK plates with a bottom-mounted, dimpled foil getter and engraved bases.  CLEAN tubes with clear lettering, nice tight bases, and no loose parts or rattles.  Test STRONG on my Amplitrex digital tester.  Results:

TUBE 1:   4,270 mhos  /  40.8 mA
TUBE 2:   4,200 mhos  /  61.1 mA

    Average NEW / NOS spec for this type is 5,200 mhos (100%) / 60.0 mA with 3,640 mhos being considered MINIMUM GOOD.  NOTE:  pictured Cunningham tube box is for display purposes only and is not included in sale.  






 


     
     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.  
     Thank you for choosing Valves-Tubes!