Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!rochester!ken From: ken@rochester.arpa (Ken Yap) Newsgroups: sci.electronics,talk.bizarre Subject: Re: "Magic Eye" tubes Message-ID: <540@sol.ARPA> Date: Tue, 14-Jul-87 12:19:56 EDT Article-I.D.: sol.540 Posted: Tue Jul 14 12:19:56 1987 Date-Received: Thu, 16-Jul-87 06:05:51 EDT References: <1495@frog.UUCP> <35ffa63b.b8ab@apollo.uucp> <6@spar.SPAR.SLB.COM> <1384@brspyr1.BRS.Com> <1841@kitty.UUCP> Reply-To: ken@rochester.UUCP (Ken Yap) Organization: U of Rochester, CS Dept, Rochester, NY Lines: 13 Xref: mnetor sci.electronics:969 talk.bizarre:2490 |2. The "Decatron" tube, which consisted of a round tube with ten | anodes, equally spaced about a circle. It was nothing more than | a multiple neon lamp, since it displayed no digits, but each anode | was labeled on the panel. Example: a Baird-Atomic nuclear scaler | that I once used. Actually it was a little more than a multiple neon lamp because it had auxiliary electrodes which could cause the glow to migrate to the next anode. By applying the appropriate sequence of pulse waveforms you could get it to count. Hence its use as a high speed counter before RTL, DTL and TTL counters like 7490 came along. Ken