EEVblog Electronics Community Forum
Electronics => Projects, Designs, and Technical Stuff => Topic started by: BurningTantalum on December 23, 2017, 12:13:18 pm
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A non-technical friend called to say that he had acquired a box of "those things that you have in your workshop" and did I want it, so I told him to bring it round. It was a huge cardboard box full of electronic components, some in ziplock bags, some loose. It has taken me all afternoon to sort them into heaps on the dining table- anything with 3 legs in one heap, ICs in another heap, caps, diodes, connectors etc. I think that it came from an electronic supplier that closed down many years ago in a town down the coast. Many of the plastic bags have flaked to bits with UV exposure, so I grabbed handfuls of loose components and sorted them roughly.
One component (among many) caught my eye. It is a STR440 in a modified TO3 case (3 legs.). I cannot find any data on this, other than it is a monolithic 107V output 0.6A regulator.
I don't recall seeing anything that needed 107V specifically.
Any ideas for its intended use?
I have seen the 3 leg TO3 case style only once before, and it was a high-voltage switching transistor by Motorola used in a vehicle ignition system.
Regards, BT
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STR440 is a high (107V) voltage regulator to supply the picture tube coil of a tv.
(http://www.dtforum.info/index.php?action=dlattach;topic=11158.0;attach=268582690;image)
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Picture tube? Don't be silly, TVs don't have a picture tube and a coil, instead they have an LCD screen.
Oh, I think I remember that TVs a long time ago had a picture tube and deflection coils.
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108 volts is also common in oscilloscopes which may have something to do with being twice 54 volts.
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Sanken commonly made modules like this and judging by the part number it's one of those!
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Picture tube? Don't be silly, TVs don't have a picture tube and a coil, instead they have an LCD screen.
Oh, I think I remember that TVs a long time ago had a picture tube and deflection coils.
You did a funny!
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Thanks everyone- I knew that someone would know!
Happy New Year, BT
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Picture tube? Don't be silly, TVs don't have a picture tube and a coil, instead they have an LCD screen.
Oh, I think I remember that TVs a long time ago had a picture tube and deflection coils.
What is this antique tech you call an LCD? Everybody knows TVs have OLEDs. ;)