RCA
5BK7A
VACUUM TUBE - THE 5BK7A IS A MINIATURE DOUBLE TRIODE DESIGNED PRIMARILY FOR USE AS A CASCODE AMPLIFIER AT FREQUENCIES BELOW APPROXIMATELY 300 MEGA CYCLES IN 600MA SERIES HEATER OPERATED RECEIVERS - THE PERFORMANCE OF THE TUBE AS A CASCODE AMPLIFIER IS CHARACTERIZED BY HIGH GAIN AND A LOW NOISE FIGURE - THERMAL CHARACTERISTICS OF THE HEATER ARE CONTROLED SUCH THAT HEATER VOLTAGE SURGES DURING THE WARM-UP CYCLE ARE MINIMIZED PROVIDED IT IS USED WITH OTHER TYPES WHICH ARE SIMILARLY CONTROLLED - WITH THE EXCEPTION OF HEATER RATINGS, ITS CHARACTERISTICS ARE IDENTICAL TO THE 6BK7A - 5BK7A
中间价(CNY):21.3497
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