CBBS(R) 4.0.3b 07/06/91 23:25:42 Y/N: want CBBS "1st time user" info?^U ?^U ?^U ?n;ward;christensen;odraw;;fullc;piss Logging name to disk... You are caller 222463; next msg =44954; 374 active msgs. Prev. call 07/05/91 @ 22:52, next msg was 44949 Recording logon for next time... Use FULL? to check assignments ?^U ?xxxxx "Mine" command checking for msgs TO you, ^K >Function:?dir c:log;dir c:killed;dir summary;type-20 log,ward c;or;*;short LOG. 7 KILLED. 15 SUMMARY. 24 07/05/91,00:13:46,222423,2,WARD CHRISTENSEN,, E#44945,6 07/05/91,00:46:41,222424,9,DENNIS LEONG,,7 07/05/91,02:08:30,222425,9,ERIC BOHLMAN,,4 07/05/91,04:03:15,222426,2,ALEX ZELL,, 07/05/91,04:36:03,222427,2,PETE JONES,,1 07/05/91,06:29:00,222428,2,MICHAEL MCDANIEL,,2 07/05/91,08:10:19,222429,2,PAUL VADER,Arlington Heights/ IL,4 07/05/91,09:25:50,222430,2,BOB JOHNSTON,, E#44946,10 07/05/91,09:41:43,222431,2,TOM KOWALCZYK,Burbank/ Il.,5 07/05/91,10:20:11,222432,2,BILL FISCHER,, E#44947,2 07/05/91,10:24:15,222433,1,PETER FLIEGEL,,0 07/05/91,10:34:00,222434,2,BILL FISCHER,,2 07/05/91,10:40:21,222435,2,DON PIVEN,,3 07/05/91,10:54:38,222436,9,TONY ANTONUCCI,,13 07/05/91,13:13:44,222437,2,JOHN SERRANO,,1 07/05/91,13:58:03,222438,2,ALEX ZELL,, E#44948,11 ]Yeah, I know Randy spelled it differently, but we have an image to maintain. ALEX ZELL, 07/05/91,15:01:06,222439,9,BRIAN SCHAER,,3 07/05/91,18:42:25,222440,2,DANIEL ABRAMS,Deerfield/ IL.,5 07/05/91,18:49:09,222441,2,BILL WOLFF,,0 07/05/91,19:56:02,222442,2,DON PIVEN,,1 07/05/91,20:51:46,222443,2,JOHN CARSON,Burlington,4 ]Will read my buffer & sign on later. bye JOHN CARSON, 07/05/91,21:44:57,222444,3,MURRAY ARNOW,,4 07/05/91,22:19:03,222445,9,THOM QUICK,,2 07/05/91,22:47:45,222446,2,CLIFF SHARP,,2 07/05/91,22:52:06,222447,2,WARD CHRISTENSEN,, E#44949,3 07/05/91,22:58:14,222448,2,JOHN SERRANO,,1 07/06/91,02:29:46,222449,2,DON PIVEN,,1 07/06/91,04:05:01,222450,2,JERRY OLSEN,, E#44950,14 07/06/91,06:46:24,222451,2,SHERMAN KAPLAN,,38 07/06/91,08:55:59,222452,2,CHARLIE KESTNER,,3 07/06/91,10:35:04,222453,3,MURRAY ARNOW,,1 07/06/91,10:57:21,222454,2,BILL WOLFF,, E#44951, E#44952, E#44953,6 07/06/91,11:04:28,222455,2,ED FOSTER,,1 07/06/91,11:21:16,222456,1,GAYLAND BLOETHE,,8 07/06/91,12:04:38,222457,2,MILTON STANLEY,,1 07/06/91,12:41:04,222458,2,BILL MATTSON,,2 07/06/91,19:15:05,222459,2,BILL WOLFF,,1 07/06/91,19:57:31,222460,2,BILL HODGES,Aurora/ Ill,8 07/06/91,20:43:18,222461,1,JAMES LE FEBER,Chicago Il., >Help: \,9 07/06/91,21:52:41,222462,3,JIM COLLING,,14 07/06/91,23:25:47,222463,2,WARD CHRISTENSEN,, 44949 07/05/91 WARD CHRISTENSEN => BILL FISCHER: "R/CHINET DOWN?" 44950 07/06/91 JERRY OLSEN => ALL: "INTNL. SHAREWARE SOURCES" 44951 07/06/91 BILL WOLFF => MURRAY ARNOW: "R/CRT LIFETIMES" 44952 07/06/91 BILL WOLFF => CLIFF SHARP: "GETTER THEORY" 44953 07/06/91 BILL WOLFF => MURRAY ARNOW: "REFERENCE BOOK" ---- End of summary ---- Retrieving flagged msgs: C skips, K aborts. Msg 44949 is 07 line(s) on 07/05/91 from WARD CHRISTENSEN to BILL FISCHER re: R/CHINET DOWN? About once a week, Randy has a system board memory parity error with Chinet - which is running on a 20mhz 386. Randy decided - "for speed freaks like you, Ward" (grin) to move his own 386/33 to Chinet, as he crashed Thurs nite. Well, turns out his 4th drive just won't be recognized by Unix, though DOS loves it. SO chinet was down for the transfer, testing, and eventual restoration of it on the 20mhz system. Msg 44950 is 10 line(s) on 07/06/91 from JERRY OLSEN to ALL re: INTNL. SHAREWARE SOURCES I'm writing an assigned cover-story article on "Shareware around the World" for which I'll be soliciting viewpoints from individuals in roughly 20 countries outside the U.S. on five continents. I'm looking for leads to sources to expand my current list. Individuals needn't be "experts" on shareware or have any particular qualifications other than some connection to shareware. Sources may be everyday shareware end users, dealers, BBS sysops, etc. The only real prerequisites are a reasonable command of the English language and availability by voice, modem or (preferably) FAX during July and August. I would welcome leads to possible sources. Thanks. Msg 44951 is 29 line(s) on 07/06/91 from BILL WOLFF to MURRAY ARNOW re: R/CRT LIFETIMES Hi Murray! How does the getter continue to operate when the tube is off? Oh you must mean when the cathode current is off. Where does the getter really sit? And from what voltage does it operate from? Here is a crude drawing of a CRT. Can you elaborate? --------\ | \ | \ | --------------------------| | | | | < | | | | | < | | | | | < | | --------------------------| | +20KV / | | | | | / --------/ F B S C F=Focus; B=Brightness; C=Cathode w/heaters times 3 Also from what I can gather, the shadow mask is the same surface as what the high voltage is also applied to. And ground is applied to the coating just outside the CRT, which makes a really big capacitor at high voltage. In this case, it's 20KV, do I have this right so far? Now the barium isn't really in the electron beam path per se, but must be a lower energy cloud of electrons which focus' to the high voltage, correct? It would also make sense to fire up a CRT from time to time to prevent the CRT from losing too much vacuum and burn up the filaments. Also does the getter operate without filament voltage? If so, then one would benefit by disconnecting the filaments first for a few hours to 24 hours, if they believed the vacuum is bad. Is this so? Msg 44952 is 30 line(s) on 07/06/91 from BILL WOLFF to CLIFF SHARP re: GETTER THEORY Well Cliff, your sort of close about how a getter works but I believe your a little side tracked. The idea isn't to coat the inside of the CRT to prevent further leakage in, but rather to trap gases and stick them to the sides to get them out of the way of the electron beam and to prevent oxygen (another gas) from burning up the filaments. I suppose some coating of porous areas (though glass isn't very porous) would take place, but not likely to be a big benefit. Let's say if an air molecule happen to make it through the glass. I doubt if a small amount of barium will continue to stop it. How our ion getter pumps would work in our electron microscopes (a large CRT really) which it appears CRT getters don't have was large magnetics (although the yoke might work as one) to cause electrons (and I suppose atoms) to take a spiral path instead of a straight one. Which would cover more area than a straight path. Like getting two birds with one stone, so to speak. We also used titanium instead of barium. Why I don't know? Maybe Murray has the answer! My guess would be because titanium works better, but also cost a lot more. We are talking about $150 for a CRT and $500,000 for an electron microscope. You can add a few extras for that price. Our ion pumps claimed to have a life of 20,000 hours. Which was about 2 years at 24 hours per day. Though it seems to me, they would work closer to 5 years (at 24 hours per day) as a general rule (though some are still going after 10+ years). The poorer the vacuum, the shorter they usually lasted. The shortest one would last about 2 years. Our getters would operate with about 3KV and no heater. I don't think getters ever used heaters, but Murray should know for sure. I understand that a getter was invented only after they found out when they used a gauge for high vacuum which was called a penning tube (or penning gauge), would actually start to pump on small loads. Someone got the idea to make larger ones and then formed what we now call a getter. Hey Murray! If the getter supply is isolated, one could measure the vacuum in the CRT! I suppose measuring the current for the high voltage while the tube is off would do it. Too bad we have no way to know what current equals for what vacuum though! Msg 44953 is 10 line(s) on 07/06/91 from BILL WOLFF to MURRAY ARNOW re: REFERENCE BOOK Hi Murray! I know you may not be interested in electronics per se, but here's a great reference book called "Horowitz and Hill: The Art of Electronics." It takes a reader with no experience in electronics to a reasonable degree of proficiency in electronic circuit design (really an expert by typical researchers in the physical sciences). It is somewhat old (1980), but saved my neck a number of times. It is published by Cambridge University Press and I got my copy about 6 or 7 years ago at Kroch's & Brentano's for $29.95. Of course, they had to special order it. By the way, the ISBN is 0-521-23151-5. It doesn't have anything on tubes, just solid state devices. It does have a lot on computers and even something on the RS-232 protocol. No dup. chars. >Function:?