Hi To get the boards down to a reasonable price, you need to have a project with broad appeal. Spreading $2K setup charges across four boards isn't going to work out very well.
The real answer is to find somebody with a good vision system on their basement pick and place system. Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of K. Szeker Sent: Thursday, December 16, 2010 3:16 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Frequency counter recommendation Hi Bob, Clear, itsn`t everybodys "thing", but you can belive me, that an BGA, even with 1mm pitch too, is really nothing for a home lab... Otherwise, I have in the past years hand soldered lot of 0.5mm pitch connectors & QFP ICs too, its not the holyday job for me, bud with a litle experience is doable. Needs a good solder system with finest tip of less 0.4mm, lot of good quality flux & of course magnifying glasses... My solderstation is over 10 years old, have both handpieces for that, and you can order it jet too_in more up to date version: http://www.jbctools.com/english/tecinfo/tecinfo_Disc.php For moderner multilayer boartds you must have a similar heating system so & so, but it has moderate prices to other "better" brands, which aren`t so good regulated if you should work on multilayer.... Karesz 2010/12/16 Bob Camp <[email protected]> > Hi > > From what I have seen of hand soldered 0.5 mm spaced / several hundred pin > packages - not very easy at all, even with pro gear and pro soldering > people. Based on the adverse reaction on the list to 14 pin 1 mm spaced > parts, I don't think there's much chance of a big QFP being popular. > > Bob > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of K. Szeker > Sent: Thursday, December 16, 2010 2:36 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Frequency counter recommendation > > Hi Bob, > > If a 256 ball package is the solution for these FPGA, I would prefer it in > 256 QFP-package version-if exists. > These will be solderable for the good "home-specialists", bat a BGA (even > with "only" 256 balls) is a real problem for home labs... > > Karesz > > 2010/12/16 Bob Camp <[email protected]> > > > Hi > > > > Yes indeed, been there done that. Not very hard at all. > > > > All you need is the six layer pc board (can be bought), the FPGA (Digikey > > has them), a few of these and a couple of those. Spend less than $100 and > > you are in business if the PC board volume is high enough. > > > > In this case the next step in the business is to solder the 256 ball 1 mm > > spacing BGA package down on the pc board. Not so easy without the right > > tools... > > > > Bob > > > > -----Original Message----- > > From: [email protected] [mailto:[email protected]] On > > Behalf Of Don Latham > > Sent: Wednesday, December 15, 2010 3:48 PM > > To: Discussion of precise time and frequency measurement > > Subject: Re: [time-nuts] Frequency counter recommendation > > > > OK, time-nuts, here's the gauntlet. can't "we" generate a design for a > > PC-based FPGA or chip setup that would be generally useful as a counter? > > We've seen thorough discussions about trigger jitter, which IMHO is the > > fundamental problem. And isn't the PIC2 Time base from 10 MHz standard, > > all else should be straightforward. > > I'm not a designer, just a messer-arounder, or I'd give it a shot. Robot > > Basic is a nice PC software maybe. > > Don > > > > J. L. Trantham, M. D. > > > I suspect that this question will lead to a discussion of Dual Mixers > but > > > as > > > far as the counter question goes, I would recommend you consider an HP > > > 5370B. > > > > > > Joe > > > > > > -----Original Message----- > > > From: [email protected] [mailto:[email protected]]on > > > Behalf Of Dave M > > > Sent: Wednesday, December 15, 2010 1:55 PM > > > To: TimeNuts > > > Subject: [time-nuts] Frequency counter recommendation > > > > > > I'm a retired electronics tech and computer programmer. I have a > pretty > > > decently equipped shop for almost all of my projects and experiments. > > > However, my time and frequency equipment is a bit long in the tooth. I > > > have > > > a couple old HP 5328A counters (commercial version; not the military > > > version), one with a 10544, the other with a 10811 oscillator. > > > I have an HP Z3801A that has been operating well for several years, and > > > recently acquired a TBolt to keep the counters in tune. I also have a > > > good > > > distribution amp and couple of old Montronics (Fluke) frequency > > > comparators. > > > What I'm looking for now, is a recommendation for a good low-cost > (<$400) > > > counter that will get me on the way to performing some of the "down in > > the > > > grass" noise, jitter and deviation tests that the more learned members > of > > > the group discuss. I know that new equipment is far out of my budget, > > but > > > I'm also aware that some of the older, now obsolete (also cheaper) > > > equipment > > > is quite capable of doing what I want to do. I prefer HP equipment > since > > > manuals are much easier to find than most other brands. > > > I'd also like recommendation for a good low-cost GPIB controller that > > > allows > > > me to write software to control some of my instruments. I have > > experience > > > writing software in BASIC on a Fluke 1722A controller. I've seen these > > > controllers on the Bay and other online vendors, but I've not located > the > > > BASIC discs for them. Any advice? > > > I realize that a counter is not the only piece that I need, but it's > > first > > > on my list. Other, more applicable equipment is on my want list, but > > will > > > have to wait for a bit. > > > > > > Thanks for advice, > > > David > > > dgminala at mediacombb dot net > > > > > > _______________________________________________ > > > time-nuts mailing list -- [email protected] > > > To unsubscribe, go to > > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > and follow the instructions there. > > > ----- > > > No virus found in this message. > > > Checked by AVG - www.avg.com > > > Version: 10.0.1170 / Virus Database: 426/3317 - Release Date: 12/15/10 > > > > > > > > > _______________________________________________ > > > time-nuts mailing list -- [email protected] > > > To unsubscribe, go to > > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > and follow the instructions there. > > > > > > > > > -- > > "Neither the voice of authority nor the weight of reason and argument are > > as significant as experiment, for thence comes quiet to the mind." > > R. Bacon > > "If you don't know what it is, don't poke it." > > Ghost in the Shell > > > > > > Dr. Don Latham AJ7LL > > Six Mile Systems LLP > > 17850 Six Mile Road > > POB 134 > > Huson, MT, 59846 > > VOX 406-626-4304 > > www.lightningforensics.com > > www.sixmilesystems.com > > > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
