2 Sylvania 12AV7 Vacuum Tubes NOS NIB Lot Of Two Joachim Grubich

2 Sylvania 12AV7 Vacuum Tubes NOS NIB Lot Of Two Joachim GrubichThis pair of new old stock, new in box Sylvania 12AV7 dual triodes tested 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

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

This matched pair of Philips Miniwatt PCF80 / 9U8 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

They were also Apex-Matched with readings very-similar to our own

new in box US-made 6W6GT tubes tested to spec on our Paul Hart-calibrated TV7/U

These nine tubes were tested on our Paul Hart-calibrated TV7 for shorts

I have played it in my Bottlehead Crack headphone amp and it sounds great

but not in guitar amps and other environments with loud noise and/or excessive vibration

coke-bottle-shape glass envelopes and terrific flashing

new in box GE 6AC7 tubes tested to spec on our Paul Hart-calibrated TV7/U

64 and 64 where minimum (65%) is 50 and 100% is 77

top O getters and large anode radiators for cooler operation and extended tube life

The dust jacket is in nice condition