On Wednesday, December 14, 2011 02:28:02 PM cogoman did opine: > Seems like a zillion years ago, when I was young and dumb, I bought a > used Phillips PM3212 25MHz triggered sweep dual trace scope from a > vendor at the Trenton Computer Fair. I wasn't dumb enough for them > though. They sold it without scope leads, so I found some bare copper > wire and took it over to one of the buildings and plugged it in to > check the channels. The whole thing was dead as a doornail. When I > took it back to the vendor, he kindly took back the paperweight and > gave me another. He had about 8 of them there for sale. This second > one checked out and showed a nice square wave from the 1.2V calibration > output. I don't know how accurate the waveform is, and 25 MHz doesn't > sound like much, but it's fast enough to measure the speed of light in > a small space (about 12 inches per nanosecond) and it's fast enough to > be useful on most waveforms short of microwave. The main thing is, > when you need an oscilloscope, you need an oscilloscope. Sometimes > even an old recurrent weep dinosaur can save your bacon. > Chuckle, I kept a tv station on the air for 2 years with a 35 mhz version of that scope, actually a decent scope for the money at the time. But its pushbuttons were pretty iffy after about 6 months. Double insulated, I had it sitting with its chassis at nearly 2.5 kilovolts once.
> Mark Wendt wrote: > > I recently became the proud papa of a Tektronix > > > > 7623A O'scope, purchased off the Bay of E. It's a mainframe storage > > scope, capable of handling three plugins - two vertical amps and a > > horizontal timebase. I got that machine, a few different plugins, a > > number of probes, and some other odds and ends for less than $500. > > It's an analog scope, but in it's time, it was one of the high-end > > scopes that Tek made, and it's still going strong even at close to 30 > > years of age. > > > > This one is identical to the one I have: > > > > <www.ebay.com/itm/Tektronix-7623-Oscilloscope-Modules-and-Manuals-/230 > > 552776690> > > > > You can get better prices by waiting a bit. I got mine for $100 plus > > shipping. > > > > A venerable high quality machine that you can use to help troubleshoot > > problems like the ones that showed up in the Encoder thread. > > ------------------------------------------------------------------------ > ------ Cloud Computing - Latest Buzzword or a Glimpse of the Future? > This paper surveys cloud computing today: What are the benefits? > Why are businesses embracing it? What are its payoffs and pitfalls? > http://www.accelacomm.com/jaw/sdnl/114/51425149/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> Checking host system type... i586-unknown-linux configure: error: sorry, this is the gnu os, not linux -- Topic on #Linux ------------------------------------------------------------------------------ Cloud Computing - Latest Buzzword or a Glimpse of the Future? This paper surveys cloud computing today: What are the benefits? Why are businesses embracing it? What are its payoffs and pitfalls? http://www.accelacomm.com/jaw/sdnl/114/51425149/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
