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Re: Amperex #6977 subminiature indcator tube (1958)

From Michael Black <et472@ncf.ca>
Newsgroups alt.folklore.computers
Subject Re: Amperex #6977 subminiature indcator tube (1958)
Date 2015-12-14 11:54 -0500
Organization National Capital Freenet, Ottawa, Ontario, Canada
Message-ID <alpine.LNX.2.02.1512141151000.3149@darkstar.example.org> (permalink)
References <d40213f3-ce0f-4a00-84e8-9ff1e84ffd02@googlegroups.com>

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On Mon, 14 Dec 2015, hancock4@bbs.cpcn.com wrote:

> C&A had an ad for this.  Apparently, this unit is intended
> to light up, but I'm not sure how it would be classified.
>
> The text says,
>
> The Amperex 6977 is a high vacuum filamentary subminiature
> indicator triode which gives a bright blue-green indication
> when the control grid is at zero potential.  It has been
> developed specifically for transistorized computers, where
> its high input impedence and small signal requirements enable
> it to monitor the transistor circuits without loading them
> and affecting their operation.  It replaces the conventional
> and much more expensive high-voltage transistor and neon
> lamp combination used so far in transistor computers for
> the same purpose.  Since its high impedence permits
>
I don't know.

There were "magic eye tubes" that were used for indicators, I seem to 
recall there was a circle at the top, and the more signal, the more of the 
circle lit up.

I think they were related to cathod ray tubes, but can't remember.

They generally had a triode built in, but that was more for amplification, 
if you needed the indicator, you'd need that stage of amplification.

But the description here sounds like something else.

There were eventually lots of devices for displaying numbers, the Nixie 
tube, 7segment LED readouts, but there were some that required high 
voltage but weren't Nixie tubes, and others that used some other process 
but didn't need high voltage.

This thing sounds like an on/off indicator but I'm not sure what process 
it uses.

   Michael

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Amperex #6977 subminiature indcator tube (1958) hancock4@bbs.cpcn.com - 2015-12-14 08:28 -0800
  REPOST Amperex #6977 subminiature indcator tube (1958) hancock4@bbs.cpcn.com - 2015-12-14 08:33 -0800
  Re: Amperex #6977 subminiature indcator tube (1958) Michael Black <et472@ncf.ca> - 2015-12-14 11:54 -0500
    Re: Amperex #6977 subminiature indcator tube (1958) Quadibloc <jsavard@ecn.ab.ca> - 2015-12-14 17:07 -0800
      Re: Amperex #6977 subminiature indcator tube (1958) Michael Black <et472@ncf.ca> - 2015-12-14 23:25 -0500
        Re: Amperex #6977 subminiature indcator tube (1958) hancock4@bbs.cpcn.com - 2015-12-15 18:38 -0800
    Re: Amperex #6977 subminiature indcator tube (1958) Quadibloc <jsavard@ecn.ab.ca> - 2015-12-14 17:11 -0800
      Re: Amperex #6977 subminiature indcator tube (1958) hancock4@bbs.cpcn.com - 2015-12-14 20:07 -0800
        Re: Amperex #6977 subminiature indcator tube (1958) Michael Black <et472@ncf.ca> - 2015-12-14 23:29 -0500
          Re: Amperex #6977 subminiature indcator tube (1958) Dave Garland <dave.garland@wizinfo.com> - 2015-12-15 00:15 -0600
  Re: Amperex #6977 subminiature indcator tube (1958) "Osmium" <r124c4u102@comcast.net> - 2015-12-14 11:08 -0600
    Re: Amperex #6977 subminiature indcator tube (1958) scott@slp53.sl.home (Scott Lurndal) - 2015-12-14 17:57 +0000
  Re: Amperex #6977 subminiature indcator tube (1958) jhhaynes@earthlink.net - 2015-12-15 15:54 -0800
    Re: Amperex #6977 subminiature indcator tube (1958) Michael Black <et472@ncf.ca> - 2015-12-15 19:12 -0500
      Re: Amperex #6977 subminiature indcator tube (1958) Dave Garland <dave.garland@wizinfo.com> - 2015-12-15 19:41 -0600
      Re: Amperex #6977 subminiature indcator tube (1958) isw <isw@witzend.com> - 2015-12-15 23:07 -0800
        Re: Amperex #6977 subminiature indcator tube (1958) Jon Elson <jmelson@wustl.edu> - 2015-12-16 14:32 -0600
          Re: Amperex #6977 subminiature indcator tube (1958) Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-12-16 22:59 +0000
            Re: Amperex #6977 subminiature indcator tube (1958) hancock4@bbs.cpcn.com - 2015-12-17 07:30 -0800
              Re: Amperex #6977 subminiature indcator tube (1958) Michael Black <et472@ncf.ca> - 2015-12-17 15:07 -0500
                Re: Amperex #6977 subminiature indcator tube (1958) hancock4@bbs.cpcn.com - 2015-12-17 13:06 -0800
          Re: Amperex #6977 subminiature indcator tube (1958) Michael Black <et472@ncf.ca> - 2015-12-17 14:56 -0500
            Re: Amperex #6977 subminiature indcator tube (1958) "Charles Richmond" <numerist@aquaporin4.com> - 2015-12-17 14:12 -0600
              Re: Amperex #6977 subminiature indcator tube (1958) Michael Black <et472@ncf.ca> - 2015-12-18 19:43 -0500
                Re: Amperex #6977 subminiature indcator tube (1958) Quadibloc <jsavard@ecn.ab.ca> - 2015-12-20 01:43 -0800
                Re: Amperex #6977 subminiature indcator tube (1958) Michael Black <et472@ncf.ca> - 2015-12-20 10:16 -0500
                Re: Amperex #6977 subminiature indcator tube (1958) "Osmium" <r124c4u102@comcast.net> - 2015-12-20 10:58 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) "Charles Richmond" <numerist@aquaporin4.com> - 2015-12-21 14:13 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) hancock4@bbs.cpcn.com - 2015-12-21 13:17 -0800
                Re: Amperex #6977 subminiature indcator tube (1958) Lawrence Statton <lawrence@senguio.mx> - 2015-12-21 19:24 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) Gene Wirchenko <genew@telus.net> - 2015-12-21 18:03 -0800
                Re: Amperex #6977 subminiature indcator tube (1958) Jon Elson <jmelson@wustl.edu> - 2015-12-22 17:29 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) Morten Reistad <first@last.name.invalid> - 2015-12-22 14:03 +0100
                Re: Amperex #6977 subminiature indcator tube (1958) Lawrence Statton <lawrence@senguio.mx> - 2015-12-22 12:39 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) JimP <solosam90@gmail.com> - 2015-12-22 14:37 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) Michael Black <et472@ncf.ca> - 2015-12-22 19:45 -0500
                Re: Amperex #6977 subminiature indcator tube (1958) Ahem A Rivet's Shot <steveo@eircom.net> - 2015-12-23 10:53 +0000
                Re: Amperex #6977 subminiature indcator tube (1958) Morten Reistad <first@last.name.invalid> - 2015-12-23 23:42 +0100
                Re: Amperex #6977 subminiature indcator tube (1958) Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-12-21 21:48 +0000
                Re: Amperex #6977 subminiature indcator tube (1958) hancock4@bbs.cpcn.com - 2015-12-22 07:41 -0800
                Re: Amperex #6977 subminiature indcator tube (1958) Michael Black <et472@ncf.ca> - 2015-12-22 11:22 -0500
                Re: Amperex #6977 subminiature indcator tube (1958) Jon Elson <jmelson@wustl.edu> - 2015-12-21 17:29 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) "Charles Richmond" <numerist@aquaporin4.com> - 2015-12-21 13:58 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) hancock4@bbs.cpcn.com - 2015-12-21 13:07 -0800
                Re: Amperex #6977 subminiature indcator tube (1958) "Osmium" <r124c4u102@comcast.net> - 2015-12-21 15:40 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) Lawrence Statton <lawrence@senguio.mx> - 2015-12-21 17:09 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) "Osmium" <r124c4u102@comcast.net> - 2015-12-21 17:29 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) Quadibloc <jsavard@ecn.ab.ca> - 2015-12-21 17:03 -0800
                Re: Amperex #6977 subminiature indcator tube (1958) Lawrence Statton <lawrence@senguio.mx> - 2015-12-21 19:28 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) "Charles Richmond" <numerist@aquaporin4.com> - 2015-12-22 15:46 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) Lawrence Statton <lawrence@senguio.mx> - 2015-12-22 19:13 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) Morten Reistad <first@last.name.invalid> - 2015-12-23 23:25 +0100
                Re: Amperex #6977 subminiature indcator tube (1958) Lawrence Statton <lawrence@senguio.mx> - 2015-12-21 17:04 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) "Charles Richmond" <numerist@aquaporin4.com> - 2015-12-21 13:56 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) hancock4@bbs.cpcn.com - 2015-12-21 13:10 -0800
                Re: Amperex #6977 subminiature indcator tube (1958) Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-12-21 21:48 +0000
                Re: Amperex #6977 subminiature indcator tube (1958) hancock4@bbs.cpcn.com - 2015-12-22 07:42 -0800
                Re: Amperex #6977 subminiature indcator tube (1958) Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-12-22 16:03 +0000
                Re: Amperex #6977 subminiature indcator tube (1958) Michael Black <et472@ncf.ca> - 2015-12-22 11:25 -0500
                Re: Amperex #6977 subminiature indcator tube (1958) Lawrence Statton <lawrence@senguio.mx> - 2015-12-21 16:48 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) "Osmium" <r124c4u102@comcast.net> - 2015-12-21 17:37 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) Lawrence Statton <lawrence@senguio.mx> - 2015-12-21 18:25 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) hancock4@bbs.cpcn.com - 2015-12-22 07:46 -0800
                Re: Amperex #6977 subminiature indcator tube (1958) Michael Black <et472@ncf.ca> - 2015-12-22 11:24 -0500
                Re: Amperex #6977 subminiature indcator tube (1958) Peter Flass <peter_flass@yahoo.com> - 2015-12-22 11:28 -0500
                Re: Amperex #6977 subminiature indcator tube (1958) "Osmium" <r124c4u102@comcast.net> - 2015-12-22 15:20 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) Michael Black <et472@ncf.ca> - 2015-12-22 19:51 -0500
                Re: Amperex #6977 subminiature indcator tube (1958) Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-12-23 17:18 +0000
                Re: Amperex #6977 subminiature indcator tube (1958) Michael Black <et472@ncf.ca> - 2015-12-22 19:33 -0500
                Re: Amperex #6977 subminiature indcator tube (1958) hancock4@bbs.cpcn.com - 2015-12-22 09:47 -0800
                Re: Amperex #6977 subminiature indcator tube (1958) "Osmium" <r124c4u102@comcast.net> - 2015-12-22 15:17 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) hancock4@bbs.cpcn.com - 2015-12-22 13:31 -0800
                Re: Amperex #6977 subminiature indcator tube (1958) Peter Flass <peter_flass@yahoo.com> - 2015-12-22 16:48 -0500
                Re: Amperex #6977 subminiature indcator tube (1958) Jon Elson <jmelson@wustl.edu> - 2015-12-22 17:43 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) Dave Garland <dave.garland@wizinfo.com> - 2015-12-22 19:35 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) tracymnelson@gmail.com - 2015-12-23 11:55 -0800
                Re: Amperex #6977 subminiature indcator tube (1958) Michael Black <et472@ncf.ca> - 2015-12-22 19:50 -0500
                Re: Amperex #6977 subminiature indcator tube (1958) Lawrence Statton <lawrence@senguio.mx> - 2015-12-22 18:56 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) Quadibloc <jsavard@ecn.ab.ca> - 2015-12-23 02:38 -0800
                Re: Amperex #6977 subminiature indcator tube (1958) "Osmium" <r124c4u102@comcast.net> - 2015-12-23 13:55 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) Lawrence Statton <lawrence@senguio.mx> - 2015-12-23 14:12 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) Lawrence Statton <lawrence@senguio.mx> - 2015-12-22 12:28 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) hancock4@bbs.cpcn.com - 2015-12-22 11:06 -0800
                Re: Amperex #6977 subminiature indcator tube (1958) "Charles Richmond" <numerist@aquaporin4.com> - 2015-12-22 15:58 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) Lawrence Statton <lawrence@senguio.mx> - 2015-12-22 12:24 -0600
                Re: Amperex #6977 subminiature indcator tube (1958) hancock4@bbs.cpcn.com - 2015-12-22 11:09 -0800
  Re: Amperex #6977 subminiature indcator tube (1958) terry+googleblog@tmk.com - 2015-12-16 21:33 -0800

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