On Wednesday, December 14, 2011 11:59:06 AM Dave did opine: > On 12/14/2011 10:47 AM, Mark Wendt wrote: > > On 12/14/2011 10:39 AM, andy pugh wrote: > >> On 14 December 2011 15:17, Peter C. Wallace<p...@mesanet.com> wrote: > >>> I know, I have a 7704 with a couple 7A26s and the delaying time base > >>> plus frequency counter (< 1PPM last time I checked) on a test > >>> bench here, bought used, and its been running for>20 years... > >> > >> I can't believe that you work with such museum pieces. > >> I have a modern digital storage scope. > >> (OK, so it is only _relatively_ modern, it's a Tek 336 from 1983.) > > > > Why, that's just a few years younger'n my dinosaur! ;-) > > > > Mark > > If you can afford the cash, the newer portable portable digital scopes > are really nice. Fluke makes a nice one that I used to chase down some > encoder problems on an SSI installation last summer (I borrowed the > scope).
I think I've seen that one, sweet! > As it turned out, Heidenhain encoders do not like to be > miswired such that the 24 volt power source is connected to the SSI data > lines! 8-O I corrected the wiring, but the encoders were already > damaged (and unrepairable). We got new encoders (over $1K each), > installed them on the machine, I left, the electricians found a > discrepancy in the wiring, and "corrected" the encoder wiring - blowing > out a second set of encoders! Heidenhain was happy to supply a 3rd > set of encoders for an additional $2K. And I assume they couldn't find a quarter? > It was nice to be able to easily carry the scope around the machine > (which was very large). I think the one I was using was in the $3000 > range. But I have seen them on Ebay go for about $1500 used. The > company was making aerospace assembly machines so > $3K is chump change for them. That scope is really nice for field > service work. If I ever have to replace mine, certainly. > If you have the space and can take the work to the scope, a used Tek > scope sounds like a good option. Around a broadcast station, with lots of stuff rack mounted, that is often not an option. More than likely I was working on it while it was on the air, or going to be on the air in 30 seconds! So the scope has to be portable enough to go where its needed, 6 foot up a 8 foot stepladder if that's where you need it. Use a :) or a :( as required... > Dave > > > ------------------------------------------------------------------------ > ------ Cloud Computing - Latest Buzzword or a Glimpse of the Future? > This paper surveys cloud computing today: What are the benefits? > Why are businesses embracing it? What are its payoffs and pitfalls? > http://www.accelacomm.com/jaw/sdnl/114/51425149/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> The six great gifts of an Irish girl are beauty, soft voice, sweet speech, wisdom, needlework, and chastity. -- Theodore Roosevelt, 1907 ------------------------------------------------------------------------------ Cloud Computing - Latest Buzzword or a Glimpse of the Future? This paper surveys cloud computing today: What are the benefits? Why are businesses embracing it? What are its payoffs and pitfalls? http://www.accelacomm.com/jaw/sdnl/114/51425149/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
