These tubes are hot and I will have more to sell soon!!!
I personally tested them
with a Global Specialties Regulated AC Supply/Variac/Line
Monitor in conjunction with a Condor Electronics Maxi-Matcher.
The quartet of Tung-Sol 5881's that you receive are
tested at the correct plate voltage and bias settings and
measurements were taken of the following parameters: Ip (plate
current draw at quiescence), Gm (transconductance), and diode
shorts. Finally, I placed all four in one side of a Mesa Stereo 2:90
amp and played through them with a Suhr Strat for the purpose
of listening for any potential microphonic behavior, 'tube rattle',
or 'shot noise'.
50.00 shipped