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This listing is for a balanced 6AS7G tube.
Tested for Noise and Balance in dark voice headphone amplifier. Condition is \"New\". Shipped with USPS First Class.One year replacement warranty.
On my B&K tester:Below 55 = BAD55-66 = ?65 -100 = Good100-120+ = NOS
Each tube is tested in the dark voice headphone amplifier for Symmetrical Output.
Photo shows tube being tested in headphone amp.
Using a Kenwood 3 channel 40 MHz scope with 56 ohm load resistors on each channel,
At 2 Volts RMS output. With 330 mV input signal at 1K and 10K
If the tubes do not produce symmetrical output, soundstage will not be centered
Tubes are guaranteed to meet the Industry standard for a New Vacuum Tube.
Shipping: $5.95 Each Additional: $1.00
