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Groups > alt.folklore.computers > #155545

Re: Amperex #6977 subminiature indcator tube (1958)

From Charlie Gibbs <cgibbs@kltpzyxm.invalid>
Newsgroups alt.folklore.computers
Subject Re: Amperex #6977 subminiature indcator tube (1958)
Date 2015-12-23 17:18 +0000
Organization NewsGuy - Unlimited Usenet $23.95
Message-ID <n5el0g0212o@news6.newsguy.com> (permalink)
References (10 earlier) <55b39c04-0ac1-409e-882b-5026190ac8e4@googlegroups.com> <alpine.LNX.2.02.1512221122520.18456@darkstar.example.org> <1089532850.472494299.458096.peter_flass-yahoo.com@news.eternal-september.org> <ddtt4lFk66qU1@mid.individual.net> <alpine.LNX.2.02.1512221950440.19211@darkstar.example.org>

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On 2015-12-23, Michael Black <et472@ncf.ca> wrote:

> On Tue, 22 Dec 2015, Osmium wrote:
>
>> "Peter Flass" wrote:
>>
>>> Michael Black <et472@ncf.ca> wrote:
>>>
>>>> Some argue that that was fatal for the FM broadcast band, it took a good
>>>> long time to recover, and it seems like it was the late sixtiesh and
>>>> "underground radio" that caused FM to boom.

Still, some stations carried on.  CHQM-FM went on the air in Vancouver
in 1960, playing mostly elevator music (and sometimes classical).
They're still going today - and, given that soft rock is the elevator
music of the '90s, one could argue that they're still playing elevator
music.

"Elevator music brings me down."  -- me

>>> FM has much better sound quality, but it is a lot like digital TV - you
>>> either get the signal or you don't, there is no "almost".  AM is like
>>> analog TV - you can tweak the tuning to get at least something, if not a
>>> great signal.

Not really.  The signal doesn't cut out, it just gets very noisy (probably
due to all the multipath reflections).  I often try to listen to KING-FM
in Seattle (over 100 miles away).  It's considered unlistenable by some
people, but is usually still recognizable - and it's the nearest FM
station that offers 24/7 classical music (mixed with membership pledge
drives).  Aggravating the problem is the new station that just started
up in Vancouver on 98.3 MHz, which pretty much wipes out KING-FM's signal
on 98.1 when you're downtown.

The local CBC station plays classical music, but only between 9 a.m. and
2 p.m., and their transmitter has what sounds like some sort of buffer
underrun problem that introduces a glitch about once a minute; it's harely
noticeable on loud, fast-moving music (like their pop segments), but for
slow classical pieces it's like Chinese water torture.  It's been going on
for over two years now, and nobody seems to give a damn.

>> Some FM receivers have a switch so you can turn sterol off.  It often has a 
>> nice side effect of reducing the hiss that results from a less than perfect 
>> signal. 

Another switch that you don't see much anymore is AFC (automatic frequency
control).  I guess the new tuners are stable enough to not need it.

> And car radios often have a variable effect, summing the channels together 
> according to signal strength, so a noisy signal won't be noisier due to 
> stereo, while a good signal has very good stereo separation..

This isn't so much due to some special design of car radios but to the
nature of the stereo FM signal itself.  For backward compatibility, the
main signal is mono (the sum of left and right channels), and a difference
signal (left minus right) modulates a 38-kHz subcarrier.  If the signal
is strong enough (and you haven't flipped the "mono" switch if you have
one), the receiver's stereo decoder kicks in.

-- 
/~\  cgibbs@kltpzyxm.invalid (Charlie Gibbs)
\ /  I'm really at ac.dekanfrus if you read it the right way.
 X   Top-posted messages will probably be ignored.  See RFC1855.
/ \  HTML will DEFINITELY be ignored.  Join the ASCII ribbon campaign!

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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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