Tested with AMPLITREX AT-1000 Tube tester MADE IN USA. Other test made Reboxed in our custom white box. Closing adhesive tape in brown paper – ECO-KRAFT. Brown paper sealing tape – ECO-KRAFT. TEST RESULT: VERY STRONG.
Item Tag: Power valve
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Pair 7591A SYLVANIA labeled for HAMMOND Halo Getter Tubes Amplitrex Test
Both tubes tested and matched on an amplitrex AT1000 tube tester with the following results Tube 1- 64% emissions 70% gm Tube 2- 82% emissions 83% gm
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EL84 ( 6BQ5 ) AMPEREX PHILIPS O Getter KM4 Heerlen Matched Tubes Made in Holland
KM4 ∆9J4 = Heerlen 1969 October 4th week of the month. Made in Holland. To ensure the highest quality and integrity of our products, Vacuum Tubes Treasures applies burglar seals to all vacuum pipes sold through our website.