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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#41
Posted to sci.electronics.design,sci.electronics.repair
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Mystery Component
On Thu, 31 Jan 2013 15:14:00 -0800, notme wrote:
Apparently Peak-Atlas are marketing a (massively) upgraded version of their 3-terminal component analyser, it has a USB port for connection to a PC (I think it may actually do curve tracing). http://www.anatekcorp.com/atlasdca75.htm Wonderful example of something inexpensive now that would be difficult and expensive 25 years ago. ?-) |
#42
Posted to sci.electronics.design,sci.electronics.repair
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Mystery Component
"josephkk" wrote in message ... On Thu, 31 Jan 2013 15:14:00 -0800, notme wrote: Apparently Peak-Atlas are marketing a (massively) upgraded version of their 3-terminal component analyser, it has a USB port for connection to a PC (I think it may actually do curve tracing). http://www.anatekcorp.com/atlasdca75.htm Wonderful example of something inexpensive now that would be difficult and expensive 25 years ago. There was a hobby magazine project published somewhere at least 2 decades ago, similar type of thing as the DCA55 - it was pretty much someone thinking up something impressive to do with a HD44780 LCD module. IIRC it was mostly SSI/MSI - unfortunately I can't remember what magazine it was, or whether a PIC based version was ever released into the public domain. |
#43
Posted to sci.electronics.design,sci.electronics.repair
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Mystery Component
On Sat, 02 Feb 2013 05:25:57 -0500, Spehro Pefhany
wrote: On Fri, 1 Feb 2013 16:55:24 -0000, the renowned "Ian Field" wrote: "Jan Panteltje" wrote in message ... On a sunny day (Fri, 01 Feb 2013 13:17:42 GMT) it happened Jan Panteltje wrote in : OK, but that is actually an integrated circuit. Just mis-labeled 'transistor'. :-) PS, some of us here will remember RTL logic. That was pretty much like that, but more transistors to make gates, and output R too. Integrated circuits. My first job was component level fault finding on Olympia desk calculators, they contained about 4 boards of DTL - a 5th board at the back was critically sensitive MOS shift registers. The boards were about the same area as S100, but wider & not so high, the front board had about a dozen nixie tubes. I must've just missed out on RTL by not all that long, it was only just becoming scarce in component catalogues of the day. When I was a kid RTL became very available in surplus surface-mount packages (called "flat pack"). Probably some big military change-over. DTL didn't seem to last long. Spacing was tight for attaching fly wires.. looks like it was relatively coarse by today's standards- maybe 1.27mm pitch like today's SOICs. Oh my, middle 1960s to early 1970s, my teen years and a bit. Lead spacing of 50 1/1000 inch; half a tenth of an inch. Saw a lot of it in the 1970s in the US navy. Hand solderable with some care. Funny thing, a lot of the boards i repaired the leads were welded originally. Best regards, Spehro Pefhany |
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