An indirectly heated pentode with low hum and low microphony, suitable for use in low level low frequency amplifiers, measuring instruments, industrial control circuits, etc. Its low grid current makes it particularly useful in circuits requiring a high input impedance. New Old Stock * No longer available for export MFR: Emitron * MFG: England SKU: Z729-EM
An indirectly heated pentode with low hum and low microphony, suitable for use in low level low frequency amplifiers, measuring instruments, industrial control circuits, etc. Its low grid current makes it particularly useful in circuits requiring a high input impedance. New Old Stock * No longer available for export MFR: Emitron * MFG: England