ECL86, 6GW8, OUTPUT, B9A

The ECL86 was designed for use in stereophonic amplifiers with its inherent high amplification factor allowing the signals from crystal and ceramic pick-ups to be amplified to speaker-driving level with the minimum of components.  Mullard period advertising went on to laud the ECL86 in glowing terms: - 


"The new Mullard triode pentode - the ECL86 - is designed specifically for audio applications and is particularly suitable for stereophonic amplifiers; The sensitivity of the valve is such that the output derived from low-sensitivity crystal and ceramic pick-ups is adequate to produce a useful output of 3W from the valve in an atypical single-valve circuit and to allow the use of negative feedback  Special care has been taken in the design of the ECL86 to keep hum modulation to a minimum, and a hum voltage of 4µV, referred to the triode grid, is attainable."