Audio Precision System One Dual Domani Measuirement Systems

[David Looser]

"J G Miller" <miller@yoyRG> wrote in message
news:jgmkfr$esp$3@dont-email.me...

On Sunday, February 5th, 2012, at 18:44:43h +0000, Clive wrote:

I know colour came in, in 1967 on BBC2 but I thought that broadcasting
on BBC2 started in 1962. I know it was never on 405 lines.

From <http://www.hywel.org.UK/bbc2launch/

QUOTE

When BBC2 launched on April 20th 1964, ...


UNQUOTE

Remember also that BBC-2 was the first regular TV service transmitted in
UKofGB&NI on UHF channels.

So not only did it require a new TV to be able to tune to UHF and
demodulate
the signal to 625 lines, it also needed a separate antenna to the VHF Band
I
and VHF Band III antennas being used to receive the BBC television service
and the independent (commercial) television service.

Also BBC2 used -ve vision modulation and FM sound (sound carrier 6MHz above
the vision carrier), whereas the 405-line services used +ve vision
modulation and AM sound (sound carrier 3.5MHz below the vision carrier).
Dual-standard TVs were a triumph of compromise! (Dual-standard TVs were also
needed between Nov 1936 and February 1937 to cope with the Baird 240-line
system as well as the Marconi/EMI 405-line one. But in this case it was only
the timebases that needed to be switched, all RF & sound issues remained the
same).

David.

 

[J G Miller]

On Sunday, February 5th, 2012, at 12:54:13h -0500, Arny Krueger wrote:

AFAIK, we haven't had analog TV broadcast anywhere in the US since June
2009.

That just ain't true.

What you are forgetting (or perhaps never heard of because you prefer
giving money to the cable company each month) is that Class A, Low Power
TV, and Repeater TV stations were not required to go digital only in
June 2009.

<http://www.fcc.GOV/guides/dtv-transition-and-lptv-class-translator-stations>

Nonetheless, your most local station of this type, formerly W66BV Detroit
has made the transition to digital.

<http://en.wikipedia.ORG/wiki/W47DL-D>

Incidentally, does your cable TV company include this station on the basic tier?

And an interesting new development in the Detroit market, is that the station
licensed to Ann Arbor (formerly analog UHF channel 31) is going to start
broadcasting with a high power signal on UHF channel 50 (which was vacated
when WKBD, now on UHF channel 14, stopped analog transmissions) from the
Southfield tower site, and will cease transmitting from Ann Arbor.

<http://www.michiguide.COM/archives2012/2012/01/ion-television-fires-up-new-wp.html>

 

[J G Miller]

On Sunday, February 5th, 2012, at 18:29:03h +0000,
Geoffrey S. Mendelson wrote:

and resumed them at the exact point in the same broadcast after the war.

That is an urban legend and just not true.

 

[David Looser]

"J G Miller" <miller@yoyRG> wrote in message
news:jgmmmj$ag5$1@dont-email.me...

On Sun, 05 Feb 2012 19:37:25 +0000, David Looser wrote:

So if you'd been glued to your TV from Sept 1939 to June 1946
you'd have seen the film twice, thus not "resumed at the exact point"

And complain that all the BBC television service does is
show repeats.

The BBC started the way they meant to go on ;-) the second scheduled
programme was a repeat of the first! (the opening ceremony, transmitted
first on the Baird system then repeated on the Marconi/EMI system). And in
August 1936 before the service had officially started they transmitted the
same variety programme (live) twice a day for ten days for the benefit of
trade stands at Radio Olympia.

David.

 

[Dave Plowman (News)]

In article <ynIsUNpwysLPFwal@soft255.demon.co.uk>,
J. P. Gilliver (John) <G6JPG@soft255.demon.co.uk> wrote:

Towards the end of
405 line in Eire (last 5 years I think), their standards converter broke
down, and rather than fix it they used a 405 line camera pointed at a
625 monitor (more or less).

Surprised they could find a working one. In the UK, a 405 line camera
would have been B&W, and all those in use were colour long before 405 got
switched off.

--
*It was all so different before everything changed.

Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.

 

[J G Miller]

On Sunday, February 5th, 2012, at 18:44:43h +0000, Clive wrote:

I know colour came in, in 1967 on BBC2 but I thought that broadcasting
on BBC2 started in 1962. I know it was never on 405 lines.

From <http://www.hywel.org.UK/bbc2launch/>

QUOTE

When BBC2 launched on April 20th 1964, ...


UNQUOTE

Remember also that BBC-2 was the first regular TV service transmitted in
UKofGB&NI on UHF channels.

So not only did it require a new TV to be able to tune to UHF and demodulate
the signal to 625 lines, it also needed a separate antenna to the VHF Band I
and VHF Band III antennas being used to receive the BBC television service
and the independent (commercial) television service.

 

[J G Miller]

On Sun, 05 Feb 2012 19:37:25 +0000, David Looser wrote:

So if you'd been glued to your TV from Sept 1939 to June 1946
you'd have seen the film twice, thus not "resumed at the exact point"

And complain that all the BBC television service does is
show repeats.

 

[Peter Larsen]

Ron wrote:

Surely you remember analogue TV Arny, it's when we had five channels
of rubbish, now we have 900 channels and it's still rubbish

What's TV?

Ron

Kind regards

Peter Larsen

 

[Ron]

On 05/02/2012 20:59, Peter Larsen wrote:

Ron wrote:

Surely you remember analogue TV Arny, it's when we had five channels
of rubbish, now we have 900 channels and it's still rubbish

What's TV?

Ron

Kind regards

Peter Larsen



The Idiot's Lantern, The Haunted Fishtank, Radio with Pictures,

Hope this helps
Ron

 

[Clive]

In message <jgmkfr$esp$3@dont-email.me>, J G Miller <miller@yoyRG>
writes

On Sunday, February 5th, 2012, at 18:44:43h +0000, Clive wrote:
I know colour came in, in 1967 on BBC2 but I thought that broadcasting
on BBC2 started in 1962. I know it was never on 405 lines.
From <http://www.hywel.org.UK/bbc2launch/
QUOTE
When BBC2 launched on April 20th 1964, ...
UNQUOTE
Remember also that BBC-2 was the first regular TV service transmitted in
UKofGB&NI on UHF channels.
So not only did it require a new TV to be able to tune to UHF and demodulate
the signal to 625 lines, it also needed a separate antenna to the VHF Band I
and VHF Band III antennas being used to receive the BBC television service
and the independent (commercial) television service.
To add to that it also had FM sound instead of the AM used on 405 and

negative going luminance instead of the positive going luminance of 405
lines with the advantage that interference which blighted 405 with
little white "fishes" it had little black fishes and were normally out
of sight.
--
Clive

 

[Roderick Stewart]

In article <4f2ecdcc.37548551@news.eternal-september.org>, Don Pearce wrote:

That was me. It was in Eire. For the last few years they, like the BBC,
made programmes in 625 lines, and used a digital standards converter to
produce the 405-line signals for those with old sets. Towards the end of
405 line in Eire (last 5 years I think), their standards converter broke
down, and rather than fix it they used a 405 line camera pointed at a
625 monitor (more or less).


I know all about telecine, but teletele? That's a new one.

Actually, it's a very old one. Before they invented clever electronic ways
of converting television standards, that's the way it was done. Even in the
1970s, although by that time there were electronic convertors for 625 lines,
the only equipment the BBC had for dealing with 819 line signals was an
optical convertor, which amounted in essence to a camera pointing at a
monitor. I'm sure the Irish broadcasters could have done something more
elegant, but maybe they didn't think it was worth the expense.

Rod.
--
Virtual Access V6.3 free usenet/email software from
http://sourceforge.net/projects/virtual-access/

 

[Ian Jackson]

In message <VA.00000c1b.003fdc7a@escapetime.removethisbit.myzen.co.uk>,
Roderick Stewart <rjfs@escapetime.removethisbit.myzen.co.uk> writes

In article <4f2ecdcc.37548551@news.eternal-september.org>, Don Pearce wrote:
That was me. It was in Eire. For the last few years they, like the BBC,
made programmes in 625 lines, and used a digital standards converter to
produce the 405-line signals for those with old sets. Towards the end of
405 line in Eire (last 5 years I think), their standards converter broke
down, and rather than fix it they used a 405 line camera pointed at a
625 monitor (more or less).


I know all about telecine, but teletele? That's a new one.

Actually, it's a very old one. Before they invented clever electronic ways
of converting television standards, that's the way it was done. Even in the
1970s, although by that time there were electronic convertors for 625 lines,
the only equipment the BBC had for dealing with 819 line signals was an
optical convertor, which amounted in essence to a camera pointing at a
monitor. I'm sure the Irish broadcasters could have done something more
elegant, but maybe they didn't think it was worth the expense.

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.
--
Ian

 

[Mike Tomlinson]

In article <525c33ffabdave@davenoise.co.uk>, Dave Plowman (News)
<dave@davenoise.co.uk> writes

Unless you have unusually long cable runs or other special factors, it's
oversized.

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

--
(\__/)
(='.'=)
(")_(")

 

[Terry Casey]

In article <6nBuEDoUpsLPFw72@soft255.demon.co.uk>,
G6JPG@soft255.demon.co.uk says...

Eire 1961-1982 (they had 625-line from 1962).

I was in Ireland in August 1961, before RTE started.

On the last day, I visited the village post office where the following
conversation took place with the elderly post mistress:

She: "Would you mind me asking how much you're after paying for the
television licence in England?"

Me: "Four pounds and a pound for the wireless licence"

She (looking rather pleased with herself) "Ah! We're only after paying
the seventeen shillings and sixpence for the wireless licence and we
don't have the television licence!"

On our way home the following day I spotted the headline on the evening
paper:

Ł4 TV LICENCE FROM JANUARY
Wireless licence goes up to Ł1

I've always wished I could have seen the look on the old lady's face
when she saw that!

--

Terry

 

[Mike Tomlinson]

In article <PImdnRhFWezLuLHSnZ2dnUVZ_sSdnZ2d@giganews.com>, Arny Krueger
<arnyk@cocmast.net> writes

I'm not so sure about rings, but the doubled voltage looks good to me given
that I would have enough appliances that ran on 240 volts to be interesting.
I don't.

Think about it - your kettle would boil in half the time

A colleague went to work in the USA and complained about the weedy
kettles over there that take forever to boil. I suggested he take a UK
230V kettle over with him and run it off an extension to his stove
connection (i.e. 220V). Dunno if he ever bothered.

--
(\__/)
(='.'=)
(")_(")

 

[hwh]

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.

gr, hwh

 

[Mike Tomlinson]

In article <G9mdnc4dBLwHsbHSnZ2dnUVZ_tSdnZ2d@giganews.com>, Arny Krueger
<arnyk@cocmast.net> writes

If everything is on a ring, why are there an odd number of breakers?

Both ends of the ring connect into the same breaker.

32A breaker = 16A down each leg of the ring. If each leg were fed from
its own breaker, switching one breaker off would turn the ring into a
32A radial using 16A wire!

--
(\__/)
(='.'=)
(")_(")

 

[Mike Tomlinson]

In article <YOudnZSwnq5Xs7HSnZ2dnUVZ_hCdnZ2d@giganews.com>, Arny Krueger
<arnyk@cocmast.net> writes

The breakers are 4 pole?

No, single pole on the phase wire.

--
(\__/)
(='.'=)
(")_(")

 

[Mike Tomlinson]

In article <4f2d40fa.32470640@news.eternal-september.org>, Don Pearce
<spam@spam.com> writes

Try
being a little clearer next time, will you?

Terrell's a twit. Killfile fodder.

--
(\__/)
(='.'=)
(")_(")

 

[Mike Tomlinson]

In article <525c2e73aedave@davenoise.co.uk>, Dave Plowman (News)
<dave@davenoise.co.uk> writes

How are sockets connected on a radial circuit? Separate terminals for in
and out?

Yes, connecting screws each side of the socket. On the side, not on the
back, unless the socket has push-fit connectors (yuck).

--
(\__/)
(='.'=)
(")_(")