Yeah, I haven't quite figured out why they designed it this way, although the tube holder is sort of nice for working with the strip tubes. I don't think there's a way to adjust how much pressure the lid applies (like the MJ DNA engine [now biorad?] has), so maybe ABI's approach with the 9700 was to just apply a lot of pressure and have a device to keep the tubes from being crushed?
My experience with the 9700 was rather like yours, I think. When we first got it, I crushed a bunch of tubes, because who consults the manual for how to put tubes into a PCR machine? :) I initially thought that since I was not using the ABI tubes, that was the problem. So once I bought the ABI tubes and crushed some of those, I realized there must be something wrong. I think maybe the 2720 applies less pressure from the lid than the 9700.... at least that's how it feels to me, so that's probably why you were able to use it without crushing your tubes. Anyway, I'm glad you have that problem fixed! Mike --- Michael L. Sullivan, PhD Research Molecular Geneticist US Dairy Forage Research Center 1925 Linden Drive Madison, WI 53706 608-890-0046 (Phone) 608-890-0076 (FAX) On Apr 25, 2013, at 10:39 PM, DK wrote: > In article <[email protected]>, Christian Praetorius > <[email protected]> wrote: >> [email protected] (DK) wrote: >> >>> Following Mike's advise, I ordered some of the PE's original "trays" >> >> We have been using four of the 9700s with these "trays" for years now >> without any problems. > > Now that I've got the trays, I have no problems too. It just puzzles me > that while 2720 and 9700 formally list the same requirements for > plasticware, 2720 is prefectly usable without any trays who 9700 > is not. > > Bad design, IMO. > > DK > _______________________________________________ > Methods mailing list > [email protected] > http://www.bio.net/biomail/listinfo/methods _______________________________________________ Methods mailing list [email protected] http://www.bio.net/biomail/listinfo/methods
