From Aeroflex Airflyte
Perhaps your early electronics experience was with communications equipment when vacuum tubes were king. Tubes had personality. They emitted a warm glow from their filaments and cherry-red anodes, and mercury-vapor rectifiers added a blue tint to the drab gray and black equipment.
The gentle hum of high-voltage power transformers could put you to sleep. If a current needed "tweaking" you looked at a 3-inch panel meter, and took control with a knob you could get your whole fist around!
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Perhaps your early electronics experience was with communications equipment when vacuum tubes were king. Tubes had personality. They emitted a warm glow from their filaments and cherry-red anodes, and...
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