2 RCA 6BA11 Vacuum Tubes NOS NIB Lot Of Two JRC-6H6 though this headphone amp is

though this headphone amp is not optimized for this tube type

new in box (for Tube One) matched pair of RCA 6AK5 tubes was tested on our Paul Hart-calibrated TV7/U tester for shorts

Bottom: crenelated

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

There were no shorts or gas and they test as follows:

2 RCA 6BA11 Vacuum Tubes NOS NIB Lot Of Two JRC-6H6 though this headphone amp isThese new old stock, new in box RCA 6BA11 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 "LOWTECHELEC" 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