General Electric JG 6072 \ 12AY7 Vintage Preamp Vacuum Tube
Black plates, new in box, 3 mica construction. Very rare tube to find in NOS condition with a full data set. Identical tube to the GE 5-Star Black Plate.
Very well balanced triodes, tests significantly better than nominal manufacturer specs on our optimized curve tracer. They are also audio tested in an amplifier by us personally, as well as shorts test performed on Hickok 600A. Very clear photos are taken showing the cosmetic condition of the silk screen labeling on the glass.
Values for plate current, plate resistance, transconductance and voltage gain are detailed below.
Corners test simulates natural voltage
spikes under real operating conditions and tracks plate current variations. You can buy with confidence knowing every tube is fully vetted and you are getting the full picture of what you are buying.
If in the rare chance there is a problem, contact within 72 hours of purchase.
Triode #1 - Plate Current = 2.53mA \ Rp = 26826 \
Gm = 1637 \ Mu = 43.9 \ Corners = PASS
Triode #2 - Plate Current = 2.52mA \ Rp = 25893 \ Gm = 1692 \ Mu = 43.8
\ Corners = PASS