It was determined that it was made in the Soviet Union or Russia from the single-bottle sale rectifier tube structure. Measured value 54 (rejected value 40) with original box ※The measured value shows the gM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box
The pair tube direct heat triode is thought to be made in America due to its double square getter structure. The measured value is 62/54 (rejected value 38) with original box written on the base part on one side, and it makes a rustling noise inside the tube*The pair is determined based on the GM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box