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General Photography
Post you old radio/tv/electronics shot.
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<blockquote data-quote="Bob Blaylock" data-source="post: 262547" data-attributes="member: 16749"><p>What I am questioning, I suppose, is your description of an oscilloscope like mine as having been <em>“fairly new at that time”</em> in the 1970s. I don't know when Tektronix stopped making this model, but I am fairly sure that in the early-to-mid 1960s, vacuum tubes were very rapidly giving way to semiconductors, such that it seems unlikely to me that they'd have still been making them like mine in a period where one could have been <em>“fairly new”</em> in the 1970s.</p><p></p><p> I do not doubt that many of them continued to be in use for a long time after that. Mine is over forty years old, and it still works. In fact, for most applications, I find it preferable to the one other, much-more-modern oscilloscope that I own.</p><p></p><p> This is a mid 1990s-vintage Tektronix T202. It was one of the very earliest oscilloscopes on the market to not be based on a cathode-ray tube (CRT). Compared to the 502A, I find the display on this one to be lacking in contrast and clarity, and the controls to be obscure and non-intuitive. Whenever I set out to use this one, I have to spend some time fumbling around with it just to remember the basics of how to use it.</p><p></p><p><a href="http://www.flickr.com/photos/bob_blaylock/12417415905/" target="_blank"><img src="http://farm4.staticflickr.com/3739/12417415905_30788154a8_b.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p><a href="http://www.flickr.com/photos/bob_blaylock/12417415905/" target="_blank">TektronixT202_20140209_122350</a> by <a href="http://www.flickr.com/people/bob_blaylock/" target="_blank">bob_blaylock</a>, on Flickr</p></blockquote><p></p>
[QUOTE="Bob Blaylock, post: 262547, member: 16749"] What I am questioning, I suppose, is your description of an oscilloscope like mine as having been [i]“fairly new at that time”[/i] in the 1970s. I don't know when Tektronix stopped making this model, but I am fairly sure that in the early-to-mid 1960s, vacuum tubes were very rapidly giving way to semiconductors, such that it seems unlikely to me that they'd have still been making them like mine in a period where one could have been [i]“fairly new”[/i] in the 1970s. I do not doubt that many of them continued to be in use for a long time after that. Mine is over forty years old, and it still works. In fact, for most applications, I find it preferable to the one other, much-more-modern oscilloscope that I own. This is a mid 1990s-vintage Tektronix T202. It was one of the very earliest oscilloscopes on the market to not be based on a cathode-ray tube (CRT). Compared to the 502A, I find the display on this one to be lacking in contrast and clarity, and the controls to be obscure and non-intuitive. Whenever I set out to use this one, I have to spend some time fumbling around with it just to remember the basics of how to use it. [url=http://www.flickr.com/photos/bob_blaylock/12417415905/][img]http://farm4.staticflickr.com/3739/12417415905_30788154a8_b.jpg[/img][/url] [url=http://www.flickr.com/photos/bob_blaylock/12417415905/]TektronixT202_20140209_122350[/url] by [url=http://www.flickr.com/people/bob_blaylock/]bob_blaylock[/url], on Flickr [/QUOTE]
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