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A Very High Quality Porcelain (Ceramic) B9A Valve Base (Tube Socket) with Screening Can
9 pins with a screening can and shield on the base. Heavy Nickel plated Pins. Test Voltage: 1600V, Insulation resistance >10,000M ohms, Contact resistance: < 10milliohms.
For many Mullard, Brimar, Mazda, EF86, EL84, ECC81, ECC82, ECC83, and American valves inc12AX7, 12AU7, 12AT7 etc.
It sends a piercing sound omnidirectionally. Cannot be heard by normal human ears, but sends frightening sound to horses, cats, dogs, mice, rats, birds etc etc. 25KHz presents a lower frequency sound than conventional 40KHz transducers and is more effective in animal and pest control.
