Unusual functions of cheap parts
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From: Winfield Hill on 22 Jan 2006 18:14 clifto wrote... > >Michael A. Terrell wrote: >> I appreciate the >> offer of the parts, but I am to the point that I don't feel well enough >> to do anything at my workbench. It has been about 18 months since I felt >> like trying to do anything, and most of my test equipment was water >> damaged in the 2004 hurricanes. Its just too depressing to try to work >> with what little is left. > > That sucks. Sorry it happened to you. Yeah. I have some extra instruments not doing anything, if you feel well enough not to use that as an excuse. I get stuff real cheap on eBay, and sometimes Harvard types are too proud to use it. And they also give me stuff nobody wants. A perfectly-fine HP oscilloscope, for example. Before anybody makes a remark, yes I've used HP scopes, used them in EE lab years ago, and have a 500MHz 4-channel Infinium plus an Agilent's 300MHz MSO on my bench now, so hide that smirk. :-) -- Thanks, - Win
From: meow2222 on 22 Jan 2006 20:47 Winfield Hill wrote: > Yeah. I have some extra instruments not doing anything, if you feel > well enough not to use that as an excuse. I get stuff real cheap on > eBay, and sometimes Harvard types are too proud to use it. And they > also give me stuff nobody wants. A perfectly-fine HP oscilloscope, > for example. Before anybody makes a remark, yes I've used HP scopes, > used them in EE lab years ago, and have a 500MHz 4-channel Infinium > plus an Agilent's 300MHz MSO on my bench now, so hide that smirk. :-) People are funny. I had a 2 MHz scope once, did lots with it. You can use scopes well above their f_max with a simple envelope detector. NT
From: Ken Smith on 23 Jan 2006 10:17 In article <1137980825.259214.123510(a)g47g2000cwa.googlegroups.com>, <meow2222(a)care2.com> wrote: [....] >People are funny. I had a 2 MHz scope once, did lots with it. You can >use scopes well above their f_max with a simple envelope detector. I had one with about a 30KHz bandwidth. The nice thing about it was that you could switch to driving the plates externally. It got lost in a flood :< -- -- kensmith(a)rahul.net forging knowledge
From: Rich Grise on 23 Jan 2006 14:14 On Sun, 22 Jan 2006 13:57:58 +0000, Michael A. Terrell wrote: > Winfield Hill wrote: >> Michael A. Terrell wrote... >> > Winfield Hill wrote: >> >> Michael A. Terrell wrote... >> >>> >> >>> How many do you need, and can you use ones pulled from PC boards? >> >>> I may have some left that I pulled from damaged boards. >> >> >> >> One or two may be enough for proof-of-principle measurements. >> > >> > I'll see if I can find a couple for you. >> >> OK, I'll trade you some 1500V damper diodes, with datasheets. >> They should be interesting additions to your parts inventory. >> > > Win, I did a lot of digging and the best I can find is five glass > 1N4004s. As reluctant as I am to contradict a fart who's even older than me, if it's glass, it isn't a 1N4004: http://www.datasheetcatalog.com/datasheets_pdf/1/N/4/0/1N4004.shtml Cheers! Rich
From: Rich Grise on 23 Jan 2006 14:18
On Sun, 22 Jan 2006 15:14:11 -0800, Winfield Hill wrote: > clifto wrote... >> >>Michael A. Terrell wrote: >>> I appreciate the >>> offer of the parts, but I am to the point that I don't feel well enough >>> to do anything at my workbench. It has been about 18 months since I felt >>> like trying to do anything, and most of my test equipment was water >>> damaged in the 2004 hurricanes. Its just too depressing to try to work >>> with what little is left. >> >> That sucks. Sorry it happened to you. > > Yeah. I have some extra instruments not doing anything, if you feel > well enough not to use that as an excuse. I get stuff real cheap on > eBay, and sometimes Harvard types are too proud to use it. And they > also give me stuff nobody wants. A perfectly-fine HP oscilloscope, > for example. Before anybody makes a remark, yes I've used HP scopes, > used them in EE lab years ago, and have a 500MHz 4-channel Infinium > plus an Agilent's 300MHz MSO on my bench now, so hide that smirk. :-) Well, I've been known to disdain HP scopes because their sync sucks, and their knobs have terrible backlash, but at that price, hey, beggars can't be choosers! You already have my snail mail address - third or fourth class can't be that expensive - I've gone some years without a scope - a couple more weeks certainly isn't going to do me any harm! <hint, hint> Thanks! Rich |