Amplitrex AT1000 Tested!

All professionally tested and packaged.

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All tubes are measured for Mutual Conductance (GM) on my Amplitrex AT1000.

6SN7 GM TEST SPECS:

2480< = Within NOS SPECS

2160 - 2470 = VERY STRONG

1860 - 2150 = STRONG

1560 - 1850 = GOOD

<1550 = TRASH

Test Results (Left to Right):

2200/2100