Matched Quad General Electric GE 6SN7 6SN7GTB Vacuum Tubes Copper Support Rods

Matched Quad General Electric GE 6SN7 6SN7GTB Vacuum Tubes Copper Support RodsThis matched quad of GE 6SN7GTB dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 56 56 for Tube One and 58 61 for Tube Two. Tubes Three and Four measured 58 61 and 60 62, respectively. (Minimum (65%) is 50 50.) They have horse shoe getters; copper support rods; great flashing and 60 13 188 5, 56 39 188 5, 59 13 188 5 and 57 26 188 5 date factory

dimpled-O getters and an additional mica spacer for lowered microphonics

These tubes have stout

I have played them in my Bottlehead Crack headphone amplifier and they sounded outstanding

new in box Sylvania 6BQ6GTB tubes tested to spec on our Paul Hart-calibrated TV7/U

There is no listening report as this LP is still sealed

These tubes have dark

I have played them in my Radio Craftsmen RC-2 monoblocks with adapters (not included) and they sound outstanding

new in box US-made 6CG8A tubes tested to spec on our Paul Hart-calibrated TV7/U

No microphone

This pressing has light surface noise audible in the few quiet passages these LPs contain

new in box RCA 6DW4B tubes tested to spec on our Paul Hart-calibrated TV7

" replicating this album's nuances and dynamic range with precision