Sylvania 12AU7 12AU7A NOS-Testing Copper Support Rods Triple 3 Mica Vacuum Tube For Your Bottlehead Univalve T15 T03 5 record cleaner and then

5 record cleaner and then played on our Rega Planar 3 with an Ortofon X5-MC cartridge on an RB-300 tone arm with a Cern Audio phono stage feeding our Musical Paradise MP-301 single-ended integrated amplifier which drives PSB Alpha Minis

This Tung-Sol 9BR7 tube tested to spec on our Paul Hart-calibrated TV7/U

and if you need just one strong section

Tube Two is a bit microphonic and it is therefore recommended that this matched pair not be used in areas with excessive vibration

black plates and Micanol bases

Sylvania 12AU7 12AU7A NOS-Testing Copper Support Rods Triple 3 Mica Vacuum Tube For Your Bottlehead Univalve T15 T03 5 record cleaner and thenThis 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