International Servicemaster 6HG8 ECF86 Vacuum Tube NOS NIB Transleteronic

International Servicemaster 6HG8 ECF86 Vacuum Tube NOS NIB TransleteronicThis new old stock, new in box Japanese International Servicemaster 6HG8 ECF86 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

new in box black plate CBS-Hytron 6W4GT tested to spec on our Paul Hart-calibrated TV7/U

new in box milspec RCA 12SG7 JAN-CRC-12SG7 tube tested to spec on our Paul Hart-calibrated TV7/U

stellar flashing

new in box Amperex-MANUFACTURED

but the bottle is firmly-cemented to it and there is no movement at all possible

Where the labeling took place is anyone's guess as the Raytheon-branded tube is stamped "England" while the Ameco tube claims to have been made in the USA

They are dead quiet when the CD player is paused (I have no preamp) and have excellent frequency response

These four US-made 12SC7 tubes tested as follows on our Paul Hart-calibrated TV7/U:

dark gray rounded plates and excellent flashing

These two RCA 6JV8 tubes tested to spec on our Paul Hart-calibrated TV7/U

72/76 and 92/90 where minimum (65%) is 50/50 and 100% is 77/77

There were no shorts or gas and it measured 42 where minimum (65%) is 26