Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!cs.utexas.edu!wuarchive!wugate!uunet!zephyr.ens.tek.com!tektronix!sequent!mntgfx!mbutts From: mbutts@mentor.com (Mike Butts) Newsgroups: comp.arch Subject: Re: ENIAC Query Message-ID: <1989Nov14.020457.416@mentor.com> Date: 14 Nov 89 02:04:57 GMT References: <405@gvlv2.GVL.Unisys.COM> Distribution: usa Organization: engr Lines: 22 From article <405@gvlv2.GVL.Unisys.COM>, by kleonard@gvlv2.GVL.Unisys.COM (Ken Leonard): > In article webber@porthos.rutgers.edu (Bob Webber) writes: > * [re types of vacuum tubes used in ENIAC] > * 4,200 6L6 Beam Power > * 1,300 6V6 Beam Power > well, for sure, neither if these is what one would call "low power consumption" > but then... > * 350 807 (Enlarged 6L6) > I dimly recall ham transmitters that used a couple of these > as final amplifier--at a plate power level of a couple hundred watts. > Do I remember correctly, or do I have an advanced case of cranial decrepitude? > What was ENIAC doing to need _that_much_ power in one stage of logic? > Or did the builders include these just so they would have a place to fry > their eggs in the morning? Clock drivers, I'll bet. A professor of mine worked on a 50's Univac machine with 807 clock drivers. ZZZAP!!! -- Michael Butts, Research Engineer KC7IT 503-626-1302 Mentor Graphics Corp., 8500 SW Creekside Place, Beaverton, OR 97005 !{sequent,tessi,apollo}!mntgfx!mbutts mbutts@pdx.MENTOR.COM Opinions are my own, not necessarily those of Mentor Graphics Corp.