6GM8/ECC86

Unique miniature 9-pin frame-grid dual triode specifically engineered to operate cleanly at ultra-low plate voltages down to 6.3 or 12 volts, optimized for low-noise car radios. Equivalents: ECC86, 6GM8. Real-Life Examples: Blaupunkt and Telefunken hybrid vacuum-tube/transistor automotive radios, custom low-voltage audiophile hybrid preamplifiers.