4 RCA 7551 Vacuum Tubes Lot Of Four October 7 2021 This is a testament to

This is a testament to their high emissions

They tested (from left to right

68 and 69 where minimum is 45

Sylvania-BRANDED 8BQ5 tube tested to spec on our Paul Hart-calibrated TV7/U

It is dead quiet when the preamp is muted and has excellent frequency response and dynamics

4 RCA 7551 Vacuum Tubes Lot Of Four October 7 2021 This is a testament toThese four RCA 7551 tubes tested as follows on our Paul Hart calibrated TV7 U: 42, 42, 44 and 48 where minimum (65%) is 30. 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