Vacuum Tube - 5654 / 6AK5W, Pentode, Sharp Cut-Off, RF
New-Old-Stock (NOS) tube.
The 5654 is a miniature sharp-cutoff pentode for use as a wide-band, high-frequency amplifier. It is also useful in video and audio amplifiers, oscillators, mixers, frequency multipliers, and cathode followers.
The 5654 is a special quality tube intended for use in critical industrial and military applications in which operational dependability is of primary importance. Features of this tube include a high degree of mechanical strength and a heater-cathode construction capable of withstanding many thousand cycles of intermittent operation. When used in on-off control applications, the tube will maintain its emission capabilities after long periods of operation under cutoff conditions.
Analysis of the electrical characteristics with those of the 6AK5 will indicate that the 5654 is essentially similar.