A good digital oscilloscope?
in [Design]
|
From: Spehro Pefhany on 15 Dec 2009 16:46 On 15 Dec 2009 21:10:28 GMT, Robert Latest <boblatest(a)yahoo.com> wrote: >Jan Panteltje wrote: >> On a sunny day (10 Dec 2009 17:34:26 GMT) it happened Robert Latest >><boblatest(a)yahoo.com> wrote in <7ocpp2F3p9ht0U2(a)mid.uni-berlin.de>: >> >>>Jan Panteltje wrote: >>>> 'Spiritus' is 85% Ethanol, and 3% Methanol, plus a horribe smell and >>>> taste added... Vodka is expensive, and only 40%, heavely taxed here. >>> >>>I don't think there's methanol in it. >>> >>>robert >> >> Spiritus has it written on the bottle, contains: >> 85 % Ethanol >> max 3 % Methanol. > >That's integesting. I need to check, but I think in Germany "Spritus" is >just alcohol plus some non-toxic but extremely bitter-tasting additives. >OK, the German Wikipedia confirms this. No Methanol. > >robert Denaturing can use different additives. Maybe it's illegal to poison people in Germany.
From: Jon Kirwan on 15 Dec 2009 16:56 On Tue, 08 Dec 2009 10:58:50 -0800, Joerg <invalid(a)invalid.invalid> wrote: ><snip> >Back in those days watch dials would be readable all night, not nearly >have that much decay. That is no longer the case, no matter what fancy >material they use. Missed this. I used to own a radium dial watch when a kid. I could quite literally read a scifi book in bed with it. It was that bright. I had to put it under something to cover it up if I wanted to sleep. Not exactly a flashlight, but it did provide a fair degree of light. These days, the closer equivalent is a tritium dial. Half life of something like 19-20 years and fairly low energy electrons (40keV? something like that.) The work very much nice enough for me and I have one. Jon
From: Joerg on 15 Dec 2009 17:00 Jon Kirwan wrote: > On Tue, 08 Dec 2009 10:58:50 -0800, Joerg <invalid(a)invalid.invalid> > wrote: > >> <snip> >> Back in those days watch dials would be readable all night, not nearly >> have that much decay. That is no longer the case, no matter what fancy >> material they use. > > Missed this. I used to own a radium dial watch when a kid. I could > quite literally read a scifi book in bed with it. It was that bright. > I had to put it under something to cover it up if I wanted to sleep. > Not exactly a flashlight, but it did provide a fair degree of light. > > These days, the closer equivalent is a tritium dial. Half life of > something like 19-20 years and fairly low energy electrons (40keV? > something like that.) The work very much nice enough for me and I > have one. > I have one as well, from Chase-Durer. But it isn't nearly as bright as the old watches. -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: Jan Panteltje on 15 Dec 2009 17:11 On a sunny day (15 Dec 2009 21:10:28 GMT) it happened Robert Latest <boblatest(a)yahoo.com> wrote in <7oqca4F3nni4kU2(a)mid.uni-berlin.de>: >Jan Panteltje wrote: >> On a sunny day (10 Dec 2009 17:34:26 GMT) it happened Robert Latest >><boblatest(a)yahoo.com> wrote in <7ocpp2F3p9ht0U2(a)mid.uni-berlin.de>: >> >>>Jan Panteltje wrote: >>>> 'Spiritus' is 85% Ethanol, and 3% Methanol, plus a horribe smell and >>>> taste added... Vodka is expensive, and only 40%, heavely taxed here. >>> >>>I don't think there's methanol in it. >>> >>>robert >> >> Spiritus has it written on the bottle, contains: >> 85 % Ethanol >> max 3 % Methanol. > >That's integesting. I need to check, but I think in Germany "Spritus" is >just alcohol plus some non-toxic but extremely bitter-tasting additives. >OK, the German Wikipedia confirms this. No Methanol. > >robert ftp://panteltje.com/pub/spiritus_img_1703.jpg I would not trust wikipedia anymore now that they filter on contributors,.
From: Jon Kirwan on 15 Dec 2009 17:30
On Tue, 15 Dec 2009 14:00:09 -0800, Joerg <invalid(a)invalid.invalid> wrote: >Jon Kirwan wrote: >> On Tue, 08 Dec 2009 10:58:50 -0800, Joerg <invalid(a)invalid.invalid> >> wrote: >> >>> <snip> >>> Back in those days watch dials would be readable all night, not nearly >>> have that much decay. That is no longer the case, no matter what fancy >>> material they use. >> >> Missed this. I used to own a radium dial watch when a kid. I could >> quite literally read a scifi book in bed with it. It was that bright. >> I had to put it under something to cover it up if I wanted to sleep. >> Not exactly a flashlight, but it did provide a fair degree of light. >> >> These days, the closer equivalent is a tritium dial. Half life of >> something like 19-20 years and fairly low energy electrons (40keV? >> something like that.) The work very much nice enough for me and I >> have one. > >I have one as well, from Chase-Durer. But it isn't nearly as bright as >the old watches. Right. Not nearly. Too bad. Hmm. Now where can I order myself up some refined radium, today? ;) Jon |