PRC as a amplifier in GPS question.

[Trevor Wilson]

On 15/08/2016 3:31 PM, Phil Allison wrote:

Computer Nerd Kev wrote:


It would be cheaper and much better to buy a modern digital CRO, eg
something like a Rigol 1052. Far and away superior than wrestling with
ancient junk.


Old 'scopes are fine if they suit the job.


** And they suit lots of jobs that DSOs like the Rigol do not.



The only links that I know of for BWD manuals are here:
http://bee.mif.pg.gda.pl/ciasteczkowypotwor/B.W.D/
http://www.kevinchant.com/bwd.html

Neither has a manual for the BWD 530.

** Popular models like the 539a, 509, 821 and 824 are there.

My main scope is an 821 - like the one in this pic:

http://www.vinylengine.com/turntable_forum/gallery/image.php?album_id=1065&image_id=32914&view=no_count

Dual trace, 50Mhz, 6.3kV acceleration on the tube which has an internal graticule. Bought new in 1995 and in daily use since. So far, one 22kohm resistor and a switch pot have needed replacing.

BWD scopes are models of economical design using readily available parts.

I also have a Rigol DS1052E, barely used except for image captures for publication on the net.

**Dump the 1052 and buy a 1054Z. You won't be sorry and you'll likely do
what I did: Put the analogue 'scope on a shelf and leave it there. The
1054Z is a HUGE improvement over the 1052E. MUCH faster and more
responsive, more features, bigger screen and a far superior trace. The
probes are utter crap though. I can't part with my Tektronix 2232
though. It has it's charm. I'll probably keep it forever. I am still on
the lookout for a cheap 7000 series Tek mainframe, because I have a 7A22
plug-in that I can put to good use:

http://w140.com/tekwiki/wiki/7A22


--
Trevor Wilson
www.rageaudio.com.au

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

 

[Phil Allison]

Computer Nerd Kev wrote:

Phil Allison wrote:



" Bought new in 1995 and in daily use since. "


** Correction:

Bought new in 1985 ...

Ah, I was wondering.

The controls look nicely laid out.

** Yes - operating is very easy and intuitive and the trace is quite sharp and bright. Being analogue means what you see is always real.

The same cannot be said for DSOs like the Rigol.

Learning to use one is quite tedious and you can never really trust what you are seeing - the fact that sampling is at a *different rate* with each step of the horizontal means the usable bandwidth is constantly changing and there are strange artifacts from aliasing too.

What you see in never in real time, there is always a delay and even when the input signal stops, the DSO continues to display it for over a second.


..... Phil

 

[Trevor Wilson]

On 16/08/2016 2:39 PM, Phil Allison wrote:

Computer Nerd Kev wrote:


Phil Allison wrote:



" Bought new in 1995 and in daily use since. "


** Correction:

Bought new in 1985 ...

Ah, I was wondering.

The controls look nicely laid out.


** Yes - operating is very easy and intuitive and the trace is quite
sharp and bright. Being analogue means what you see is always real.

**Except at high writing speeds. Even with a PDA tube, the trace will
dim with higher horizontal settings. Doesn't happen with a DSO.

The same cannot be said for DSOs like the Rigol.

Learning to use one is quite tedious and you can never really trust
what you are seeing

**I think that is a bit of an over-statement. Whilst an analogue 'scope
may be better under SOME conditions, DSOs are good for 90% of applications.


- the fact that sampling is at a *different rate*

with each step of the horizontal means the usable bandwidth is
constantly changing and there are strange artifacts from aliasing
too.

**That much is true. Vertical resolution seems to be still quite poor on
even high end DSOs. Analogue 'scopes rule here.

What you see in never in real time, there is always a delay and even
when the input signal stops, the DSO continues to display it for over
a second.

**I just checked my 1054Z. I don't have the time or the facilities to
measure it, but I'd estimate way less than 100msec for both. The delay
is not noticeable.

Like I said: The 1054Z is a MASSIVE improvement over the 1052E.


--
Trevor Wilson
www.rageaudio.com.au

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

 

[Phil Allison]

Trevor Wilson wrote:

** Yes - operating is very easy and intuitive and the trace is quite
sharp and bright. Being analogue means what you see is always real.

**Except at high writing speeds. Even with a PDA tube, the trace will
dim with higher horizontal settings. Doesn't happen with a DSO.

*** Does not happen with my 821 either.

The same cannot be said for DSOs like the Rigol.

Learning to use one is quite tedious and you can never really trust
what you are seeing

**I think that is a bit of an over-statement.

*** Think whatever you like.

Whilst an analogue 'scope

may be better under SOME conditions, DSOs are good for 90% of applications.

** That is definitely a wild overstatement.

Something TW is world famous for.

- the fact that sampling is at a *different rate*
with each step of the horizontal means the usable bandwidth is
constantly changing and there are strange artifacts from aliasing
too.

**That much is true. Vertical resolution seems to be still quite poor on
even high end DSOs. Analogue 'scopes rule here.

*** Yes, there is sometimes hundreds of times more information in a good scope trace than a grainy DSO screen - which always looks like noise to me.

What you see in never in real time, there is always a delay and even
when the input signal stops, the DSO continues to display it for over
a second.

**I just checked my 1054Z. I don't have the time or the facilities to
measure it, but I'd estimate way less than 100msec for both. The delay
is not noticeable.

** But it is long enough to completely miss contact noise when you operate a signal switch while rotating a good pot produces visible noise all the time.

I find the DS1025E near unusable for trouble shooting work.


..... Phil

 

[Trevor Wilson]

On 16/08/2016 7:09 PM, Phil Allison wrote:

Trevor Wilson wrote:


** Yes - operating is very easy and intuitive and the trace is quite
sharp and bright. Being analogue means what you see is always real.

**Except at high writing speeds. Even with a PDA tube, the trace will
dim with higher horizontal settings. Doesn't happen with a DSO.


*** Does not happen with my 821 either.


The same cannot be said for DSOs like the Rigol.

Learning to use one is quite tedious and you can never really trust
what you are seeing

**I think that is a bit of an over-statement.

*** Think whatever you like.

Whilst an analogue 'scope
may be better under SOME conditions, DSOs are good for 90% of applications.


** That is definitely a wild overstatement.

Something TW is world famous for.


- the fact that sampling is at a *different rate*
with each step of the horizontal means the usable bandwidth is
constantly changing and there are strange artifacts from aliasing
too.

**That much is true. Vertical resolution seems to be still quite poor on
even high end DSOs. Analogue 'scopes rule here.


*** Yes, there is sometimes hundreds of times more information in a good scope trace than a grainy DSO screen - which always looks like noise to me.



What you see in never in real time, there is always a delay and even
when the input signal stops, the DSO continues to display it for over
a second.

**I just checked my 1054Z. I don't have the time or the facilities to
measure it, but I'd estimate way less than 100msec for both. The delay
is not noticeable.


** But it is long enough to completely miss contact noise when you operate a signal switch while rotating a good pot produces visible noise all the time.

I find the DS1025E near unusable for trouble shooting work.

**Which is exactly why I dumped mine for the 1054Z. MUCH better 'scope.
Picking up noisy pots and switches is a doddle.


--
Trevor Wilson
www.rageaudio.com.au

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

 

>You can try this link to purchase a Ness 500 keypad from alarm maintenance
These keypads are obsolete and hard to find
alarmmaintenance.com.au/ness-5000-keypad.html

 

[Rod Speed]

"Daniel" <nidan.danny@gmail.com> wrote in message
news:2d8985ec-9327-4040-a75d-96e98a9f769b@googlegroups.com...

On Friday, 16 September 2016 18:27:29 UTC+10, F Murtz wrote:
Pete wrote:
Peter Jason wrote:

It seems the power saving is nil unless the "container" is
replaced/altered to bypass the ballast & starters.

Doesn't taking the starter out remove the ballast from the circuit?

Peter


With the ones I have you put a short in place of the starter, so no.

if you do that then you will get almost the whole of your mains supply
voltage across your ballast... hear a big bang on energisation... your
circuit
protection operating... and you will probably be the owner of an
ex-ballast.

Nope. That’s the way plenty of LED tube replacements do it.

i would suggest it's just left open circuit.... the ballast is basically
there to provide
the inductive back emf high voltage kick to get the gas to ionise inside
the tube...

Its actually there to provide a choke to limit the current thru the tube
once it fires.

once it's struck the starter stays open and the ballast remains in the
circuit
(most of the voltage falls across the lamp) but doesn't do much except to
stabilise fluctuations in the operating point of the circuit

Thanks for that completely superfluous proof that you
have never had a fucking clue about anything at all, ever.

and as a safety component to limit the current prior to the fuse/circuit
breaker
operating in case of the unlikely possibility of a short occurring across
the lamp itself.

Thanks for that completely superfluous proof that you
have never had a fucking clue about anything at all, ever.

i would also suggest that fluoros are pretty energy efficient and my gut
feeling (based on experience) is that the cost saving wouldn't be worth
it.
i'd have to do the calcs to be sure of that tho. a significant factor is
the number
of times you turn them on in a day... as on start up they consume the most
energy...

 

[news16]

On Tue, 01 Nov 2016 21:34:09 +1100, F Murtz wrote:

A child of 5 or 6 high functioning autistic,is there some way to
introduce arduino type

Buy him a kit to play with.
Tell him if he doesn't want it, he can give it back to you,

IME, they have to decide what interests them.

Maths, logic problems are really easy stuff and may not indicate the
ability to do deeper work. books of puzzles might be all that they are
interested in.

Basically, they are only 5-6, just liable to be fanatical/absorbed if it
interests them.

 

[Benderthe.evilrobot]

"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:ejp7o7Fj307U1@mid.individual.net...
> I wish they'd advertise it better, so that I can ignore it deliberately.

Is that an Australian thing? - Never heard of it here in the UK.


---
This email has been checked for viruses by AVG.
http://www.avg.com

 

[Colin Horsley]

On 31/03/2017 7:21, Benderthe.evilrobot wrote:

"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:ejp7o7Fj307U1@mid.individual.net...
I wish they'd advertise it better, so that I can ignore it deliberately.

Is that an Australian thing? - Never heard of it here in the UK.

https://en.wikipedia.org/wiki/Earth_Hour

Col

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

 

[Sylvia Else]

On 31/03/2017 7:21 AM, Benderthe.evilrobot wrote:

"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:ejp7o7Fj307U1@mid.individual.net...
I wish they'd advertise it better, so that I can ignore it deliberately.

Is that an Australian thing? - Never heard of it here in the UK.

It was started here, to our shame, but it got picked up in a number of
other countries.

Showing support by turning off efficient lighting, and burning
inefficient CO2 emitting candles instead, is a common theme.

Earth hour is, above all, a demonstration of ignorance.

Sylvia.

 

[Trevor Wilson]

On 31/03/2017 9:17 AM, Sylvia Else wrote:

On 31/03/2017 7:21 AM, Benderthe.evilrobot wrote:

"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:ejp7o7Fj307U1@mid.individual.net...
I wish they'd advertise it better, so that I can ignore it deliberately.

Is that an Australian thing? - Never heard of it here in the UK.


It was started here, to our shame, but it got picked up in a number of
other countries.

Showing support by turning off efficient lighting, and burning
inefficient CO2 emitting candles instead, is a common theme.

Earth hour is, above all, a demonstration of ignorance.

**Well, not really. It was designed to make people aware of the problems
this planet faces and that we ALL need to work together to make a
difference. Certainly, turning off pool pumps (or filling in a pool,
like I did), or air conditioners will make several orders of magnitude
more impact on the environment than turning off some LED lighting, but
lighting is easy to see.


--
Trevor Wilson
www.rageaudio.com.au

 

[Sylvia Else]

On 31/03/2017 9:22 AM, Trevor Wilson wrote:

On 31/03/2017 9:17 AM, Sylvia Else wrote:
On 31/03/2017 7:21 AM, Benderthe.evilrobot wrote:

"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:ejp7o7Fj307U1@mid.individual.net...
I wish they'd advertise it better, so that I can ignore it
deliberately.

Is that an Australian thing? - Never heard of it here in the UK.


It was started here, to our shame, but it got picked up in a number of
other countries.

Showing support by turning off efficient lighting, and burning
inefficient CO2 emitting candles instead, is a common theme.

Earth hour is, above all, a demonstration of ignorance.


**Well, not really. It was designed to make people aware of the problems
this planet faces and that we ALL need to work together to make a
difference. Certainly, turning off pool pumps (or filling in a pool,
like I did), or air conditioners will make several orders of magnitude
more impact on the environment than turning off some LED lighting, but
lighting is easy to see.

Whatever the intent behind it, all it's managed to demonstrate is that
people have little understanding of the issues.

Sylvia.

 

[Rheilly Phoull]

On 31/03/2017 8:10 AM, Sylvia Else wrote:

On 31/03/2017 9:22 AM, Trevor Wilson wrote:
On 31/03/2017 9:17 AM, Sylvia Else wrote:
On 31/03/2017 7:21 AM, Benderthe.evilrobot wrote:

"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:ejp7o7Fj307U1@mid.individual.net...
I wish they'd advertise it better, so that I can ignore it
deliberately.

Is that an Australian thing? - Never heard of it here in the UK.


It was started here, to our shame, but it got picked up in a number of
other countries.

Showing support by turning off efficient lighting, and burning
inefficient CO2 emitting candles instead, is a common theme.

Earth hour is, above all, a demonstration of ignorance.


**Well, not really. It was designed to make people aware of the problems
this planet faces and that we ALL need to work together to make a
difference. Certainly, turning off pool pumps (or filling in a pool,
like I did), or air conditioners will make several orders of magnitude
more impact on the environment than turning off some LED lighting, but
lighting is easy to see.



Whatever the intent behind it, all it's managed to demonstrate is that
people have little understanding of the issues.

Sylvia.

HEH, when I see China or India doing it then it might seem revelant.

 

[Trevor Wilson]

On 31/03/2017 11:25 AM, Rheilly Phoull wrote:

On 31/03/2017 8:10 AM, Sylvia Else wrote:
On 31/03/2017 9:22 AM, Trevor Wilson wrote:
On 31/03/2017 9:17 AM, Sylvia Else wrote:
On 31/03/2017 7:21 AM, Benderthe.evilrobot wrote:

"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:ejp7o7Fj307U1@mid.individual.net...
I wish they'd advertise it better, so that I can ignore it
deliberately.

Is that an Australian thing? - Never heard of it here in the UK.


It was started here, to our shame, but it got picked up in a number of
other countries.

Showing support by turning off efficient lighting, and burning
inefficient CO2 emitting candles instead, is a common theme.

Earth hour is, above all, a demonstration of ignorance.


**Well, not really. It was designed to make people aware of the problems
this planet faces and that we ALL need to work together to make a
difference. Certainly, turning off pool pumps (or filling in a pool,
like I did), or air conditioners will make several orders of magnitude
more impact on the environment than turning off some LED lighting, but
lighting is easy to see.



Whatever the intent behind it, all it's managed to demonstrate is that
people have little understanding of the issues.

Sylvia.

HEH, when I see China or India doing it then it might seem revelant.

**The average Chinese citizen emits less than 25% of the CO2 than an
Aussie does. The average Indian citizen emits less than 10% of the
average Aussie.

Which nations caused the vast bulk of the human induced CO2 in the
atmosphere today?

Hint: It was not China nor India.

A: It was us in the West. It is up to us to demonstrate a willingness to
reduce CO2 emissions. To do otherwise, would be hypocritical.

--
Trevor Wilson
www.rageaudio.com.au

 

[Trevor Wilson]

On 31/03/2017 11:10 AM, Sylvia Else wrote:

On 31/03/2017 9:22 AM, Trevor Wilson wrote:
On 31/03/2017 9:17 AM, Sylvia Else wrote:
On 31/03/2017 7:21 AM, Benderthe.evilrobot wrote:

"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:ejp7o7Fj307U1@mid.individual.net...
I wish they'd advertise it better, so that I can ignore it
deliberately.

Is that an Australian thing? - Never heard of it here in the UK.


It was started here, to our shame, but it got picked up in a number of
other countries.

Showing support by turning off efficient lighting, and burning
inefficient CO2 emitting candles instead, is a common theme.

Earth hour is, above all, a demonstration of ignorance.


**Well, not really. It was designed to make people aware of the problems
this planet faces and that we ALL need to work together to make a
difference. Certainly, turning off pool pumps (or filling in a pool,
like I did), or air conditioners will make several orders of magnitude
more impact on the environment than turning off some LED lighting, but
lighting is easy to see.



Whatever the intent behind it, all it's managed to demonstrate is that
people have little understanding of the issues.

**How do you know?


--
Trevor Wilson
www.rageaudio.com.au

 

[Sylvia Else]

On 31/03/2017 11:31 AM, Trevor Wilson wrote:

On 31/03/2017 11:10 AM, Sylvia Else wrote:
On 31/03/2017 9:22 AM, Trevor Wilson wrote:
On 31/03/2017 9:17 AM, Sylvia Else wrote:
On 31/03/2017 7:21 AM, Benderthe.evilrobot wrote:

"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:ejp7o7Fj307U1@mid.individual.net...
I wish they'd advertise it better, so that I can ignore it
deliberately.

Is that an Australian thing? - Never heard of it here in the UK.


It was started here, to our shame, but it got picked up in a number of
other countries.

Showing support by turning off efficient lighting, and burning
inefficient CO2 emitting candles instead, is a common theme.

Earth hour is, above all, a demonstration of ignorance.


**Well, not really. It was designed to make people aware of the problems
this planet faces and that we ALL need to work together to make a
difference. Certainly, turning off pool pumps (or filling in a pool,
like I did), or air conditioners will make several orders of magnitude
more impact on the environment than turning off some LED lighting, but
lighting is easy to see.



Whatever the intent behind it, all it's managed to demonstrate is that
people have little understanding of the issues.

**How do you know?

Because if they did, they're realise that burning candles is not the way
to show support.

Sylvia.

 

[Trevor Wilson]

On 31/03/2017 11:43 AM, Sylvia Else wrote:

On 31/03/2017 11:31 AM, Trevor Wilson wrote:
On 31/03/2017 11:10 AM, Sylvia Else wrote:
On 31/03/2017 9:22 AM, Trevor Wilson wrote:
On 31/03/2017 9:17 AM, Sylvia Else wrote:
On 31/03/2017 7:21 AM, Benderthe.evilrobot wrote:

"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:ejp7o7Fj307U1@mid.individual.net...
I wish they'd advertise it better, so that I can ignore it
deliberately.

Is that an Australian thing? - Never heard of it here in the UK.


It was started here, to our shame, but it got picked up in a number of
other countries.

Showing support by turning off efficient lighting, and burning
inefficient CO2 emitting candles instead, is a common theme.

Earth hour is, above all, a demonstration of ignorance.


**Well, not really. It was designed to make people aware of the
problems
this planet faces and that we ALL need to work together to make a
difference. Certainly, turning off pool pumps (or filling in a pool,
like I did), or air conditioners will make several orders of magnitude
more impact on the environment than turning off some LED lighting, but
lighting is easy to see.



Whatever the intent behind it, all it's managed to demonstrate is that
people have little understanding of the issues.

**How do you know?



Because if they did, they're realise that burning candles is not the way
to show support.

**Who was burning candles? Does anyone even own a candle? I haven't had
one in my house for years. They are nonsensically inefficient and pretty
much useless.


--
Trevor Wilson
www.rageaudio.com.au

 

[Sylvia Else]

On 31/03/2017 11:58 AM, Trevor Wilson wrote:

On 31/03/2017 11:43 AM, Sylvia Else wrote:
On 31/03/2017 11:31 AM, Trevor Wilson wrote:
On 31/03/2017 11:10 AM, Sylvia Else wrote:
On 31/03/2017 9:22 AM, Trevor Wilson wrote:
On 31/03/2017 9:17 AM, Sylvia Else wrote:
On 31/03/2017 7:21 AM, Benderthe.evilrobot wrote:

"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:ejp7o7Fj307U1@mid.individual.net...
I wish they'd advertise it better, so that I can ignore it
deliberately.

Is that an Australian thing? - Never heard of it here in the UK.


It was started here, to our shame, but it got picked up in a
number of
other countries.

Showing support by turning off efficient lighting, and burning
inefficient CO2 emitting candles instead, is a common theme.

Earth hour is, above all, a demonstration of ignorance.


**Well, not really. It was designed to make people aware of the
problems
this planet faces and that we ALL need to work together to make a
difference. Certainly, turning off pool pumps (or filling in a pool,
like I did), or air conditioners will make several orders of magnitude
more impact on the environment than turning off some LED lighting, but
lighting is easy to see.



Whatever the intent behind it, all it's managed to demonstrate is that
people have little understanding of the issues.

**How do you know?



Because if they did, they're realise that burning candles is not the way
to show support.

**Who was burning candles? Does anyone even own a candle? I haven't had
one in my house for years. They are nonsensically inefficient and pretty
much useless.

<https://www.google.com.au/search?q=Earth+Hour+candles&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjg1PyHyP_SAhWKTrwKHcPvDfAQsAQIJA&biw=1484&bih=738>

Sylvia.

 

[F Murtz]

Trevor Wilson wrote:

On 31/03/2017 11:43 AM, Sylvia Else wrote:
On 31/03/2017 11:31 AM, Trevor Wilson wrote:
On 31/03/2017 11:10 AM, Sylvia Else wrote:
On 31/03/2017 9:22 AM, Trevor Wilson wrote:
On 31/03/2017 9:17 AM, Sylvia Else wrote:
On 31/03/2017 7:21 AM, Benderthe.evilrobot wrote:

"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:ejp7o7Fj307U1@mid.individual.net...
I wish they'd advertise it better, so that I can ignore it
deliberately.

Is that an Australian thing? - Never heard of it here in the UK.


It was started here, to our shame, but it got picked up in a
number of
other countries.

Showing support by turning off efficient lighting, and burning
inefficient CO2 emitting candles instead, is a common theme.

Earth hour is, above all, a demonstration of ignorance.


**Well, not really. It was designed to make people aware of the
problems
this planet faces and that we ALL need to work together to make a
difference. Certainly, turning off pool pumps (or filling in a pool,
like I did), or air conditioners will make several orders of magnitude
more impact on the environment than turning off some LED lighting, but
lighting is easy to see.



Whatever the intent behind it, all it's managed to demonstrate is that
people have little understanding of the issues.

**How do you know?



Because if they did, they're realise that burning candles is not the way
to show support.

**Who was burning candles? Does anyone even own a candle? I haven't had
one in my house for years. They are nonsensically inefficient and pretty
much useless.


same difference with batteries.