Mark (and Bill), I had to use my FTP client (Transmit) to get to anything. Using the browser did not work -- took me to an empty folder named "pub". Everything is there when I connect using Transmit on my iMac.
Thanks Bill, for all the work! Greatly appreciated. Dick Moore On Feb 1, 2009, at 1:39 PM, time-nuts-requ...@febo.com wrote: > Message: 7 > Date: Sun, 01 Feb 2009 14:07:32 -0500 > From: wje <w...@quackers.net> > Subject: [time-nuts] Some pics of the Datron 491x DC reference cell > To: Discussion of precise time and frequency measurement > <time-nuts@febo.com> > Message-ID: <4985f2f4.8070...@quackers.net> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > I've uploaded some photos of the Datron 10 volt cell and reference > board, as requested by a few members. > I've kept them full-resolution so you can see fine detail. But, that > means they are about 3 mb each. > The schematics for the cell board I previously posted are also > still on > the FTP site. > > DatronCell.jpg is an image of the entire cell board. The reference > board > is piggybacked on it. Note the thermal shield around the LTZ1000, and > the completely shielded sections on the board. Those contain the > digital > circuitry. The cell board itself goes into a shielded enclosure along > with the other three cells and the output buffer amp. > > DatronLTZCloseup.jpg is exactly that, a closeup of the LTZ with > thermal > shield removed. The interesting detail here is the mounting. Note the > cutouts on the board to provide thermal isolation. This board is also > very thin; I didn't measure it, but it's on the order of 0.5 - 1 mm > thick. > > DatronRefCloseup.jpg is a closeup image of the rest of the > reference board. > > The ref board is permanently soldered in place on the cell board, so I > can't show the back of it. > > The ftp login is: > > ftp ftp.quackers.net > login: f...@quackers.net > password: (none required) > > Or, directly from a browser. I know this works for Firefox, I haven't > tried it with anything else: > > ftp://f...@quackers.net:f...@ftp.quackers.net/ > > Some of you are also waiting for the schematic for the LTZ board > itself; > I'm recreating it now (since I lost it) and will post when ready. > > -- > Bill Ezell > ---------- > They said 'Windows or better' > so I used Linux. > > > > > ------------------------------ > > Message: 8 > Date: Sun, 1 Feb 2009 21:29:55 +0000 > From: Mark Sims <hol...@hotmail.com> > Subject: [time-nuts] Some pics of the Datron 491x DC reference cell > To: <time-nuts@febo.com> > Message-ID: <blu125-w513d56e2da2c8d92fec4a9ce...@phx.gbl> > Content-Type: text/plain; charset="Windows-1252" > > > I tried to access the photos... got to an empty pub directory... > > Cutouts in a circuit board around a reference chip are usually more > to relieve mechanical stress from the chip package caused by the PC > board expanding/contracting/warping. This stress can affect the > refereence voltage more than you might expect. Malone does this on > his little Xicor X6008C voltage reference boards. (BTW that chip > has been discontinued). That is why I prefer his boards over the > other one that is available on Ebay that does not cut out around > the ref chip. If you can live with that, you can get a packaged > 5V / 0.01% reference for $14.50 shipped... see Ebay item > 250366551770... the guy that builds them is closing them out... > and he ships worldwide. > _________________________________________________________________ > Windows Live? Hotmail??more than just e-mail. > http://windowslive.com/howitworks? > ocid=TXT_TAGLM_WL_t2_hm_justgotbetter_howitworks_012009 > > > ------------------------------ > > Message: 9 > Date: Sun, 1 Feb 2009 16:39:47 -0500 (EST) > From: "Richard W. Solomon" <w1...@earthlink.net> > Subject: [time-nuts] Lady Heather Question > To: time-nuts@febo.com > Message-ID: > <29501338.1233524387396.javamail.r...@mswamui- > chipeau.atl.sa.earthlink.net> > > Content-Type: text/plain; charset=UTF-8 > > Having failed to get the program working properly on an old 486 > Laptop, > I installed it on a more modern machine running XP. When I try to open > the program I get an error message about Com Port Not Available ?? > > How does one select the COM Port ? > > Thanks, Dick, W1KSZ > > > > ------------------------------ > > _______________________________________________ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > End of time-nuts Digest, Vol 55, Issue 4 > **************************************** _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
