Some getters are thin and have a strong feeling of use.
2 Gold Lions 2 GEC logos.
There is no problem with the operation, but when I shake the vacuum tube, it makes a sound.
Beautiful sound is output by checking operation with self-biased single amplifier.
According to the simple measurement, two DC currents are slightly low and the other one is low.
When I checked the operation, I didn't feel any abnormality in hearing sensation.
There is a variation in the current value, and I think it is within the range that can be used as a pair if you do your best to adjust the bias.
Reference value
DC value calculated from the cathode resistance of a self-biased single amplifier with Eb around 250 V and Rk around 470 Ω (Reference)
→49mA, 48mA, 47mA, 45mA