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Audio Precision System One Dual Domani Measuirement Systems



 
 
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  #521 (permalink)  
Old February 6th 12, 10:56 AM posted to sci.electronics.repair,uk.rec.audio,uk.tech.broadcast
Mike Tomlinson
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Posts: 34
Default Audio Precision System One Dual Domani Measuirement Systems

In article , Arny Krueger
writes

http://hostedmedia.reimanpub.com/TFH..._OUTLET_03.jpg


The ground wires in that picture appear to be in bare copper, borne out
by the person using a multimeter with a probe resting on the ground
wire. If so, that's pretty shoddy. What's to stop it coming into
contact with the exposed hot and neutral screws on the outlet body as
the outlet is pushed back into the box?

UK wiring regulations require earth (ground) wires to be sheathed in
green and yellow sleeving where it is exposed.

--
(\__/)
(='.'=)
(")_(")
  #522 (permalink)  
Old February 6th 12, 11:12 AM posted to sci.electronics.repair,uk.rec.audio,uk.tech.broadcast
Ron[_2_]
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Default Audio Precision System One Dual Domani Measuirement Systems

On 06/02/2012 11:56, Mike Tomlinson wrote:
In articleWdmdnffl5IsuA7DSnZ2dnUVZ_qmdnZ2d@giganews. com, Arny Krueger
writes

http://hostedmedia.reimanpub.com/TFH..._OUTLET_03.jpg


The ground wires in that picture appear to be in bare copper, borne out
by the person using a multimeter with a probe resting on the ground
wire. If so, that's pretty shoddy. What's to stop it coming into
contact with the exposed hot and neutral screws on the outlet body as
the outlet is pushed back into the box?

UK wiring regulations require earth (ground) wires to be sheathed in
green and yellow sleeving where it is exposed.


Also, the screws are pretty well recessed (on decent quality sockets
anyway) It's difficult to touch them with a finger accidentally.

ron
  #523 (permalink)  
Old February 6th 12, 11:16 AM posted to sci.electronics.repair,uk.rec.audio,uk.tech.broadcast
David Looser
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Default Audio Precision System One Dual Domani Measuirement Systems

"hwh" wrote in message
...
On 2/6/12 11:47 AM, Ian Jackson wrote:
The UK 405-line system was almost certainly kept going for far longer
than it really needed to be. There was probably only a handful of people
who could not receive the 625-line service. At the time, I recall that
many of us said that it would be cheaper simply to buy that last little
old lady, living in a remote valley in the middle of nowhere, a new TV
set and aerial.


Maybe it would have been better to have one 625 line network on VHF,
like most other countries used until analog closedown.
Of course going from 405 to 625 would have meant ther was no room for
two networks there.

The original plan, drawn up in the early '60s, was to re-engineer Bands 1
and 3 for 625-line operation once the 405-line service was switched off; but
it never happened. I guess that the powers that be thought that the spectrum
could be more usefully used for other purposes.

David.


  #524 (permalink)  
Old February 6th 12, 11:34 AM posted to sci.electronics.repair,uk.rec.audio,uk.tech.broadcast
Dave Liquorice[_3_]
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Posts: 11
Default Audio Precision System One Dual Domani Measuirement Systems

On Mon, 6 Feb 2012 11:40:34 +0000, Mike Tomlinson wrote:

How are sockets connected on a radial circuit? Separate terminals

for
in and out?


Yes, connecting screws each side of the socket.


Completely open as well not shroded at all. Don't like that, damaged
cover plate and very easy for little (or not so little) fingers to
make contact with a live screw.

--
Cheers
Dave.



  #526 (permalink)  
Old February 6th 12, 11:48 AM posted to uk.rec.audio,uk.tech.broadcast
Bill Wright[_2_]
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Posts: 105
Default Audio Precision System One Dual Domani Measuirement Systems

Don Pearce wrote:

I don't think anybody ever passed a law that said interference could
only make the signal go upwards. In both video polarities there are
black and white fishes. The white ones dominate visually.

d


So why were we told that one of the great advantages of 625 was that the
interference would be black?

Bill
  #527 (permalink)  
Old February 6th 12, 11:49 AM posted to uk.rec.audio,uk.tech.broadcast
Bill Wright[_2_]
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Posts: 105
Default Audio Precision System One Dual Domani Measuirement Systems

David Looser wrote:

Will be? Are you telling me some of the backward areas still have
analogue?


Yeh, that little backward area called "London" is one of them.


Oh, I don't go there. The natives can be rather peculiar I'm told.

Bill
  #528 (permalink)  
Old February 6th 12, 11:51 AM posted to uk.rec.audio,uk.tech.broadcast
Bill Wright[_2_]
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Posts: 105
Default Audio Precision System One Dual Domani Measuirement Systems

Ian Jackson wrote:

The UK 405-line system was almost certainly kept going for far longer
than it really needed to be. There was probably only a handful of people
who could not receive the 625-line service. At the time, I recall that
many of us said that it would be cheaper simply to buy that last little
old lady, living in a remote valley in the middle of nowhere, a new TV
set and aerial.


When 405 ended most of us couldn't even remember it.

Bill
  #529 (permalink)  
Old February 6th 12, 11:53 AM posted to uk.rec.audio,uk.tech.broadcast
Bill Wright[_2_]
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Posts: 105
Default Audio Precision System One Dual Domani Measuirement Systems

Dave Plowman (News) wrote:

I remember in the '50s, some villages in the Scottish Highlands paid for a
shared receiver aerial to be situated on a nearby hill.

Charles could tell you about dozens of them.

Bill
  #530 (permalink)  
Old February 6th 12, 11:54 AM posted to sci.electronics.repair,uk.rec.audio,uk.tech.broadcast
Dave Plowman (News)
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Posts: 5,872
Default Audio Precision System One Dual Domani Measuirement Systems

In article ,
Mike Tomlinson wrote:
Unless you have unusually long cable runs or other special factors, it's
oversized.


Better oversized than undersized, especially if the run is long.


Then why not use 2.5mm? 4mm?

Tables and guidelines are readily available to help you choose the correct
cable for your individual requirements. But in general 1mm is just fine
for a domestic lighting circuit protected by a 6 amp breaker.

--
*I'm out of my mind, but feel free to leave a message.

Dave Plowman London SW
To e-mail, change noise into sound.
 




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