5 RCA 12CR6 Vacuum Tubes NOS NIB Sleeve Of Five Treasure Press Their filaments are spirally-wound --

Their filaments are spirally-wound -- hence the "S" in "ECC83S" -- for low noise operation

new in box RCA 6AS8 tube tested to spec on our Paul Hart-calibrated TV7/U

This pressing has moderate surface noise audible in quiet passages and in moderate passages

This lot of four Ken-Rad number / type 58 stamped- / engraved-base tubes was tested on our Paul Hart-calibrated TV7/U for shorts

new in box GE 6GF7A tubes tested to spec on our Paul Hart-calibrated TV7/U

5 RCA 12CR6 Vacuum Tubes NOS NIB Sleeve Of Five Treasure Press Their filaments are spirally-wound --This sleeve of five new old stock, new in box RCA 12CR6 tubes 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