Zaerix 6CU7 ECH42 Vacuum Tube NOS NIB

Zaerix 6CU7 ECH42 Vacuum Tube NOS NIBThis Zaerix 6CU7 ECH42 tube tested to spec on our Paul Hart calibrated TV7 U. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP TO $100. ETSY PURCHASE PROTECTION COVERS ITEMS UP TO $250 IN VALUE. IF AN ITEM

This Concert Master 12A5 tube tested to spec on our Paul Hart-calibrated TV7/U

A 7 out of 10

This GE 18GB5 tube tested to spec on our Paul Hart-calibrated TV7/U

6 volt tubes

They have great bass and sparkling highs and Mann's voice is warm and clear as a bell

Sylvania 21JZ6 Vacuum Tube Valve NOS NIB

It is sold as-is as I could not find a tester setting for it

new in box Raytheon 5AM8 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box GE 12BL6 tubes tested to spec on our TV7/U

1-13 188-5 and 188-5 date/provenance codes

They have engraved / hot-stamped bases on is Champion-branded and the other is Zenith

but the pins are numbered