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Michael Ware
electronics forum addict
Joined: 11 Dec 2005
Posts: 66
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 Posted: Thu Jun 22, 2006 11:13 pm Post subject:
Re: tape deck speed problems
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"n cook" <diverse8@gazeta.pl> wrote in message
news:e7dief$6fs$1@inews.gazeta.pl...
| Quote: |
It begs the question , how do the manufacturers check the goodness of
their
test tapes?
I seem to remember a picture in a manual or publication showing via some
magnetic ink or similar, contrasting bands along a piece of magnetic tape
carying a constant tone , perhaps they can use that process to physically
count and measure the visualised bands on a sample of their tapes.
--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/
I remember the standard rate of tape travel over the heads is 2 |
inches/second or something. Maybe they check a 'master' deck, mechanically,
then use it to make master tapes. |
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Arfa Daily
electronics forum Guru
Joined: 06 May 2005
Posts: 588
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| Posted: Fri Jun 23, 2006 8:46 am Post subject:
Re: tape deck speed problems
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"Michael Ware" <mware@insight.rr.com> wrote in message
news:puFmg.82564$P2.78801@tornado.ohiordc.rr.com...
| Quote: |
"n cook" <diverse8@gazeta.pl> wrote in message
news:e7dief$6fs$1@inews.gazeta.pl...
It begs the question , how do the manufacturers check the goodness of
their
test tapes?
I seem to remember a picture in a manual or publication showing via some
magnetic ink or similar, contrasting bands along a piece of magnetic tape
carying a constant tone , perhaps they can use that process to physically
count and measure the visualised bands on a sample of their tapes.
--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/
I remember the standard rate of tape travel over the heads is 2
inches/second or something. Maybe they check a 'master' deck,
mechanically,
then use it to make master tapes.
I actually went looking on the net for the Konig tapes that I have to see if |
they were still available, and the only reference I could find was in New
Zealand, so I reckon that I'd better start taking more care of mine ... !!
Arfa |
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n cook
electronics forum Guru Wannabe
Joined: 11 Jan 2006
Posts: 153
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| Posted: Fri Jun 23, 2006 9:22 am Post subject:
Re: tape deck speed problems
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Michael Ware <mware@insight.rr.com> wrote in message
news:puFmg.82564$P2.78801@tornado.ohiordc.rr.com...
| Quote: |
"n cook" <diverse8@gazeta.pl> wrote in message
news:e7dief$6fs$1@inews.gazeta.pl...
It begs the question , how do the manufacturers check the goodness of
their
test tapes?
I seem to remember a picture in a manual or publication showing via some
magnetic ink or similar, contrasting bands along a piece of magnetic
tape
carying a constant tone , perhaps they can use that process to
physically
count and measure the visualised bands on a sample of their tapes.
--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/
I remember the standard rate of tape travel over the heads is 2
inches/second or something. Maybe they check a 'master' deck,
mechanically,
then use it to make master tapes.
|
I tried that one time making a length of tape in a cassette, length of tape
from head read position at start to end an exact length for 1 7/8 inches/sec
, so counting seconds but results did not agree with my commercially
produced 3.2KHz test tape (stretched?) and didn't explore any more.
--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/ |
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