Matched Pair General Electric GE 12SN7 12SN7GT Vacuum Tubes Copper Support Rods RCA Steel Plate I played them in my

I played them in my Alan Eaton single-ended 45 amplifier (as an "excellent" 6SN7 substitute according to Antique Electronic Supply's "Tube Substitution Guidebook") and they sound outstanding

They measured 65

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

I played this tube this morning it in my Bottlehead Crack headphone amp with Sennheiser SD 580s and it sounded excellent

It measured 65/70 where minimum (65%) is 50/50 and 100% is 77/77

Matched Pair General Electric GE 12SN7 12SN7GT Vacuum Tubes Copper Support Rods RCA Steel Plate I played them in myThis matched pair of General Electric GE 12SN7 12SN7GT dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 63 65 and Tube Two measured 66 64 where minimum (65%) is 50 50. Both tubes have gray, ladder plates; side horseshoe getters; crenelated, gapped, top mica spacers with smooth sided rectangular bottom mica spacers; copper support rods and great flashing. They