Tested Matched and Balanced Sylvania JAN-CHS-6SN7WGT Tubes.
Tubes are matched for Gm testing (see below) and internal structure - they are identical.
Mil-Spec pair with balanced mutual conductance (Gm), black angled T plates and top round halo getters.
The wording is partially worn on one tube and completely worn away on the other. The tube on the right has some minor surface cracking but this does not affect performance - see photo 5.
Tested on a calibrated Hickok TV-10 military tube tester with no shorts and no leaks with the following results:
Gm Test = 1750-1750 and 1750-1750 micromhos
Minimum pass/good = 1650-1650
Further tested under real operating conditions on a Class A amplifier and exhibiting no microphonics.
Subscribe to the Classic Currents email list to stay informed on exclusive offers, discount codes, and new arrivals. Your privacy is respected, and you may opt-out at any time.
Choosing a selection results in a full page refresh.
