NOS matched pair EL34 6CA7 Mullard xf4 tubes B8K4

NOS matched pair EL34 6CA7 Mullard xf4 tubes B8K4
NOS matched pair EL34 6CA7 Mullard xf4 tubes B8K4
NOS matched pair EL34 6CA7 Mullard xf4 tubes B8K4
NOS matched pair EL34 6CA7 Mullard xf4 tubes B8K4

NOS matched pair EL34 6CA7 Mullard xf4 tubes B8K4
Offer is for one matched pair EL34 6CA7 Mullard tubes. Unused tubes with code: xf4 B8K4. Test result (with Roetest V11). S/gm = 13,8 + 13,8mA/V (100% = 11,0mA/V). Final assessment: Only the slope/gm S/gm provides information about the emission. Further explanation: According to military standards, tubes with 60% (minimum value) were classified as usable.
NOS matched pair EL34 6CA7 Mullard xf4 tubes B8K4