Sylvania 12AU7 12AU7A NOS-Testing Copper Support Rods Triple 3 Mica For Your Bottlehead Univalve Chad Mitchell Trio There were no shorts or

There were no shorts or gas

Tube One (missing centering pin / keyway): Tube Two:

new in box milspec RCA JAN-CRC-884 / VT-222 tubes tested to spec on our Paul Hart-calibrated TV7/U

ETSY MAY REIMBURSE YOU EVEN IF IT WAS STOLEN

Sylvania 12AU7 12AU7A NOS-Testing Copper Support Rods Triple 3 Mica For Your Bottlehead Univalve Chad Mitchell Trio There were no shorts orThis Sylvania triple mica 12AU7A ECC82 dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 73 79 where new nominal is 50 50. This tube has two additional vertical support rods; an additional mica spacer for low microphonics; crenelated, round mica spacers and excellent flashing. I have played it in my Bottlehead Crack headphone amplifier and it sounds