8000h, 1.8ma, 100% premium permalloy
Wound in 2 halves, opposite directions for better performance.
Replacing a grid leak resistor for more stable bias, better dynamics and much better control of static charge on the grid surface (grid leak function).
You can hear the difference.
30mm x 35mm x 35mm (h x l x w)
47mm mounting centres
price is per pair