I also got several of these relays from goldmine-elec.com. I got them when they were on sale. There are more characters printed on the coil, including the 1500 ohm resistance. These are standard frame relays, with double pole, double throw contacts (see the pic). The pins are made for insertion into a PC board. The
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I was interested on the New surplus relays that goldmine-elec.com has recently acquired. BTW, these may be sold out and no longer available soon. I noticed that the operating power is only 10 to 13 milliwatts, which is extremely low. But the figures don’t make sense. Ten milliamps would go through 300 ohms, not 3000
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I get emails from Electronic Goldmine concerning their latest sales items. I have noticed a lot of electronic parts of a certain category in their sales. They may have a large number of parts from manufacturers that are switching over to newer technologies. I have noticed a large number of relays in their sales, specialty
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This is about electronics components, despite this off-topic intro. Last night I watched a Frontline episode on PBS about the drug resistant superbugs that are resistant to antibiotics. They talked about one of the genes that causes this drug resistance; it produces an enzyme called klebsiella pneumoniae carbapenemase or KPC. I searched for KPC online
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I talked to a club member about LED lights and how much money they saved in electricity. But he said he stocked up on incandescent lights before they were banned so he could have them for his radio room. He has had problems with LED lights causing RF interference with his radios, so he went
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Quantsuff emailed us a link about a new material summarized at Newscientist.com. I have a few thoughts that I’d like to add. The stuff should be great for illumination. But I have doubts about its use for display purposes. Displays have millions of very small pixels. If one or a few get contaminated with dust
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I ordered a half dozen of these huge, high current rectifiers from Goldmine for use as paper weights. That’s about all they can be used for until I find some specs or a data sheet for them. The metal base is 3 inches or 76 mm square. I have seen rectifiers much smaller than this
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As the month of February fades away into March, a Google Alert (see note) brought me an actual Joule Thief, sort of. It looks to me more like a switch mode power supply, with its opto coupler. That, to me, seemed puzzling since the primary and secondary share the same common ground. I haven’t done
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Goldmine Electronics had a sale on USD5096F 35 Volt, 35Amp Schottky diodes (they’re now sold out), so I bought a handful. These are the old style all metal stud mount package, and come without any mounting hardware. The stud is 1/4 x 28 threads, so I had to order some 1/4 x 28 TPI nuts
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I bought some cat# TOR-74 from All Electronics for 4 for $1.00. They say these toroid cores are Magnetics ZF410057C, but Google didn’t turn up any data on them. They are coated Grey, and are 9.5mm O.D., 4.5mm I.D., and 5.0mm high, or .375 inch O.D., .178 inch I.D., and .197 inch high. This is
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