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511: Difference between revisions
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The 511A weighs 50 pounds and uses 230 watts. | The 511A weighs 50 pounds and uses 230 watts. | ||
Neither the 511 nor the 511A has a [[thermal cutoff]]. | Neither the 511 nor the 511A has a [[thermal cutoff]]. | ||
Tektronix engineer Frank Hood recollects: | |||
<blockquote>"My first assignment was to build or modify some special instruments for Bonneville Power. They wanted a device that would detect and record any lightning strikes or arc-overs on the high voltage power lines running between Vancouver, Wash. and other cities such as Longview, Spokane, etc. They wanted to detect each event, in a fraction of a millionth of a second, then to send a pulse of energy down the defective line and measure the time it took to return, (this was an application much like radar). They wanted markers displayed at each mile and fraction of a mile so that they could determine the exact location of the fault. They needed to record a photographic image for latter study. Two or more such instruments were built. We called these Type 511B. They worked very well and were used for several years." | |||
</blockquote> | |||
The 511 and 511A were normally furnished with P1 [[phosphor]]. | The 511 and 511A were normally furnished with P1 [[phosphor]]. | ||