Tubes are matched for testing, date codes and internal structure - they are identical. Date Codes HE. We prefer the versatility and precision of Hickok TV-10 military testers and use them almost exclusively except in rare instances when pinout/socket compatibility is not possible.
I test all tubes thoroughly and with great care. I test to the best of my ability, and I report all results honestly.
I test all tubes thoroughly and with great care. I test to the best of my ability, and I report all results honestly.
I test all tubes thoroughly and with great care. I test to the best of my ability, and I report all results honestly.
NOS, Tested Strong, Balanced.
The product is a lot of four vintage GE Five Star 5670 2C51 vacuum tubes, manufactured in the USA. These tubes are part of the vintage audio and video collection and are ideal for collectors or enthusiasts of vintage electronics. Made by GE, a reputable brand in the industry, these vacuum tubes are a valuable addition to any vintage audio setup.
Tested on both our eTracer curve tracer, and Hickok 800A testers. Triode #1 - Plate Current = 2.87mA Rp = 24036 Gm = 1752 Mu = 42.1 Corners = PASS. Triode #2 - Plate Current = 2.67mA Rp = 28385 Gm = 1651 Mu = 41.5 Corners = PASS Gm Nominal = 1250 Minimum Good = 700.
We prefer the versatility and precision of Hickok TV-10 military testers and use them almost exclusively except in rare instances when pinout/socket compatibility is not possible. Date Code HE.
Triple Mica. Matched Trio (3). This trio has 2 support rods to minimize vibration/microphonics. Very tightly matched trio! Made in USA. Tested in my preamplifier to make sure working as intended with no issues at all.