Driver to drive?

On Monday, November 17, 2014 5:29:40 PM UTC-8, rickman wrote:

On 11/17/2014 11:53 AM, edward.ming.lee@gmail.com wrote:
On Monday, November 17, 2014 8:13:27 AM UTC-8, jurb...@gmail.com wrote:
If they actually squatted, they should not win the case. No disagreement there. Now if they stopped paying rent because the roof caved in or something...


In my case, the root leaked for one day, did not cave in. I spent thousands to repair it afterward. But he seems entitled to living free forever because it leaked one day. It never leaked again. This is just an excuse, if not for this, there are others. He even stated in his answer that he is withholding rent because there are missing shelfs in the fridge. Any sane judge would see that he is just gaming the system.

And some people are that much of an asshole to sue in a case like that..

I am pretty sure to get a net judgment against the defendant, but probably unable to collect from the deadbeat. I am angry at the court to allow such non-sense. After the eviction, will take it to the federal court to sue the state.

I may not be a lawyer, but I'm pretty sure you are fighting both an
uphill and a losing battle. States have sovereign immunity meaning you
can't sue them unless they agree to it. Obviously this has some
limitations such as complying with Federal laws and such. But you will
be hard pressed to try to recover any losses unless you can show they
acted with malice or denied you your rights. Since your problem is that
they followed due process, you just don't like the time it takes to do
that, I think you are just shortening further the short end of the stick
you were handed.

I know. But it will still catch their attention. Defendant did not respond to Order to Show Cause (not serving plaintiff) and the Judge did not follow through with the Order. Did the judge not understanding the Order, or the Court Order means nothing. If the court erred, they should be held accountable.

 

On Monday, November 17, 2014 5:56:18 PM UTC-8, rickman wrote:

On 11/17/2014 8:46 PM, edward.ming.lee@gmail.com wrote:
On Monday, November 17, 2014 5:29:40 PM UTC-8, rickman wrote:
On 11/17/2014 11:53 AM, edward.ming.lee@gmail.com wrote:
On Monday, November 17, 2014 8:13:27 AM UTC-8, jurb...@gmail.com wrote:
If they actually squatted, they should not win the case. No disagreement there. Now if they stopped paying rent because the roof caved in or something...


In my case, the root leaked for one day, did not cave in. I spent thousands to repair it afterward. But he seems entitled to living free forever because it leaked one day. It never leaked again. This is just an excuse, if not for this, there are others. He even stated in his answer that he is withholding rent because there are missing shelfs in the fridge. Any sane judge would see that he is just gaming the system.

And some people are that much of an asshole to sue in a case like that..

I am pretty sure to get a net judgment against the defendant, but probably unable to collect from the deadbeat. I am angry at the court to allow such non-sense. After the eviction, will take it to the federal court to sue the state.

I may not be a lawyer, but I'm pretty sure you are fighting both an
uphill and a losing battle. States have sovereign immunity meaning you
can't sue them unless they agree to it. Obviously this has some
limitations such as complying with Federal laws and such. But you will
be hard pressed to try to recover any losses unless you can show they
acted with malice or denied you your rights. Since your problem is that
they followed due process, you just don't like the time it takes to do
that, I think you are just shortening further the short end of the stick
you were handed.

I know. But it will still catch their attention. Defendant did not respond to Order to Show Cause (not serving plaintiff) and the Judge did not follow through with the Order. Did the judge not understanding the Order, or the Court Order means nothing. If the court erred, they should be held accountable.

Yeah, that sounds good, but there are laws that say you can't hold the
government responsible for their actions. I'm not sure what you mean
exactly by, "Judge did not follow through with the Order". If this was
brought to the Judge's attention and he tossed it off, then maybe you
have a shot. But if you expect the Judge to keep track of the
defendant's failures, that is not really what they are there for. They
do the judging based on what is brought to their attention. Nothing more..

The Order clearly say that matters in dispute are not to be considered for TWR (temporary eviction). I don't know what defendant filed with the court.. But it's not admissible without serving plaintiff. He could lie his tail off. In his answer to Appeal Court's Order to Show Answer, no valid reason for defending UD, even if he served previously. Now, defendant's game with the system renders lower court proceeding meaningless. The lower court judge has all the information to rule on TWR, but choose not to.

 

On Monday, November 17, 2014 6:35:01 PM UTC-8, Robert Baer wrote:

jurb6006@gmail.com wrote:
I mean because if the defendant wins the case, the record should disappear.
Records NEVER disappear; look up any crook that has been dead for 20
years; pick a famous or infamous one where records abound andpay the
online fee.

As i indicated, defendant WON.

It say SETTLED. It still does not change the fact that defendant took matter into his own hand and UNLAWFUL DETAINED property for months. Paying all the money does not mean the action was LAWFUL. These renters should be avoid at all cost and for good reason.

CAUSE: UND UNLAWFUL DETAINER DV:N
RESOLUTION: STPR DATE 12 06 2013 SETTLED BY PARTIES AND/OR AGREED JUDGMEN
COMPLETION: JODF DATE 12 06 2013 JUDGEMENT/ORDER/DECREE FILED
STATUS : CMPL DATE 12 06 2013 COMPLETED/RE-COMPLETE

 

[rickman]

On 11/17/2014 4:56 PM, whit3rd wrote:

On Sunday, November 16, 2014 5:01:35 PM UTC-8, rickman wrote:
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Subject: Re: Very Low Power Preamp
From: whit3rd <whit3rd@gmail.com
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On Sunday, November 16, 2014 5:01:35 PM UTC-8, rickman wrote:
On 11/16/2014 5:47 PM, whit3rd wrote:
On Saturday, November 15, 2014 7:18:17 PM UTC-8, rickman wrote:
On 11/4/2014 6:29 PM, rickman wrote:
I am working on a project for receiving a very narrow bandwidth signal
at 60 kHz [and] keep the power consumption to
an absolute minimum

How about a programmable-bias-current op amp? LM4250 is easily
available, there used to be lots of others. OTAs like LM13700 have similar
low-power specifications, with the additional feature that output loads
don't change the power requirement.

The LM4250 has too low a GBP to work at 60 kHz. The max GBW is about
300 kHz and the setting I would need brings it closer to 60,000 kHz
where it would have a gain of about 1.

Not completely relevant; remember, an amplifier performs three functions,
and voltage gain is only one. The other two, power gain (because the output
impedance is lower than input impedance) and input/output isolation,
are enough to make this chip useful. There have been suggestions
already to use positive-feedback circuitry, and isolation REALLY helps
there.

I usually can figure out what people mean when they post something new
to me. But I can't grasp how an amp with a gain of 1 would be able to
do anything useful for positive feedback. But maybe I'm just not
getting it.

I don't know much about OTAs in general and the LM13700 specifically.
It has a 2 MHz open loop bandwidth so that might work if I limit the
gain. I don't see much on power consumption and I only see mention of
ą15 volt supplies. Doesn't sound good.

LM13700 OTAs are good down to 4V or so, and current draw is under three times
the program current (fully specified, down to 3 uA). More important, the
OTA multiplies the differential input signal by the program current; it's
also a MIXER, not just another amplifier. Don't read too much into the
'open loop bandwidth' number, that depends too much on external
loading (you can push it up or down with output load choices). Older
datasheets mentioned '50V/us' typical output swing, which was also
nearly meaningless.

With so many meaningless specs I think this part would have a quite
steep learning curve for me. 4 volts is possible I suppose, but will
require yet another supply voltage.

--

Rick

 

[Phil Hobbs]

On 11/17/2014 5:20 PM, rickman wrote:

On 11/17/2014 4:56 PM, whit3rd wrote:
On Sunday, November 16, 2014 5:01:35 PM UTC-8, rickman wrote:
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Subject: Re: Very Low Power Preamp
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On Sunday, November 16, 2014 5:01:35 PM UTC-8, rickman wrote:
On 11/16/2014 5:47 PM, whit3rd wrote:
On Saturday, November 15, 2014 7:18:17 PM UTC-8, rickman wrote:
On 11/4/2014 6:29 PM, rickman wrote:
I am working on a project for receiving a very narrow bandwidth
signal
at 60 kHz [and] keep the power consumption to
an absolute minimum

How about a programmable-bias-current op amp? LM4250 is easily
available, there used to be lots of others. OTAs like LM13700 have
similar
low-power specifications, with the additional feature that output loads
don't change the power requirement.

The LM4250 has too low a GBP to work at 60 kHz. The max GBW is about
300 kHz and the setting I would need brings it closer to 60,000 kHz
where it would have a gain of about 1.

Not completely relevant; remember, an amplifier performs three functions,
and voltage gain is only one. The other two, power gain (because the
output
impedance is lower than input impedance) and input/output isolation,
are enough to make this chip useful. There have been suggestions
already to use positive-feedback circuitry, and isolation REALLY helps
there.

I usually can figure out what people mean when they post something new
to me. But I can't grasp how an amp with a gain of 1 would be able to
do anything useful for positive feedback. But maybe I'm just not
getting it.


I don't know much about OTAs in general and the LM13700 specifically.
It has a 2 MHz open loop bandwidth so that might work if I limit the
gain. I don't see much on power consumption and I only see mention of
ą15 volt supplies. Doesn't sound good.

LM13700 OTAs are good down to 4V or so, and current draw is under
three times
the program current (fully specified, down to 3 uA). More important, the
OTA multiplies the differential input signal by the program current; it's
also a MIXER, not just another amplifier. Don't read too much into the
'open loop bandwidth' number, that depends too much on external
loading (you can push it up or down with output load choices). Older
datasheets mentioned '50V/us' typical output swing, which was also
nearly meaningless.

With so many meaningless specs I think this part would have a quite
steep learning curve for me. 4 volts is possible I suppose, but will
require yet another supply voltage.

The LM13700 is as slow as molasses. All the slew and bandwidth numbers
are quoted at the specified maximum bias current I_ABC (0.5 mA, iirc),
and slow down proportionally as you reduce it.

There used to be much faster ones available, e.g. the VA713 from VTC,
but no more.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510

hobbs at electrooptical dot net
http://electrooptical.net

 

[Jamie M]

On 11/17/2014 11:29 AM, Syd Rumpo wrote:

On 17/11/2014 18:39, sroberts6328@gmail.com wrote:
Well, My NDA expired on the subject from 6 years ago. 400-1000 Watt
Co2 in a inert atmosphere. Fiber lasers can be used with some metals.

The trick is not the laser, its the specialized lensing.

Steve

Would it be possible to use a small flame? Much cruder and slower, I
suppose, but probably cheaper. Just musing. How small can you make
ox-acetylene anyway? Or CO and O2 perhaps to avoid making water.

Using a small flame, at sub millimeter spot size has some similarities
with a plasma or electron beam maybe.

cheers,
Jamie

Cheers

 

[Jamie M]

On 11/17/2014 10:39 AM, sroberts6328@gmail.com wrote:

Well, My NDA expired on the subject from 6 years ago. 400-1000 Watt Co2 in a inert atmosphere. Fiber lasers can be used with some metals.

The trick is not the laser, its the specialized lensing.

Steve

Hi,

I'm interested in hearing about the pulse waveforms driving the laser
and the laser pathing. From the video it looks somewhat similar to the
pathing used for a filament based 3D printer maybe. Also the lensing,
is the tricky part having the lens' redirect the beam down the XY axis
or is it the final beam focusing (or both). Maybe a CO2 tube could be
mounted vertically on the tool head, and a single focus lens can be
used along with Z axis height adjustment to make the optical system
simpler at the costof more weight on the tool head.

What metals can fiber lasers work with? Also what is a good source of
the metal powder and is it pretty homogenous in grain size/shape? Is
there a way to make the powder, it sounds pretty expensive currently.

Thanks for answering any of the above

Oh ya where can I find a 400-1000W CO2 tube

cheers,
Jamie

 

On Monday, November 17, 2014 7:35:51 PM UTC-8, rickman wrote:

On 11/17/2014 9:15 PM, edward.ming.lee@gmail.com wrote:
On Monday, November 17, 2014 5:56:18 PM UTC-8, rickman wrote:
On 11/17/2014 8:46 PM, edward.ming.lee@gmail.com wrote:
On Monday, November 17, 2014 5:29:40 PM UTC-8, rickman wrote:
On 11/17/2014 11:53 AM, edward.ming.lee@gmail.com wrote:
On Monday, November 17, 2014 8:13:27 AM UTC-8, jurb...@gmail.com wrote:
If they actually squatted, they should not win the case. No disagreement there. Now if they stopped paying rent because the roof caved in or something...


In my case, the root leaked for one day, did not cave in. I spent thousands to repair it afterward. But he seems entitled to living free forever because it leaked one day. It never leaked again. This is just an excuse, if not for this, there are others. He even stated in his answer that he is withholding rent because there are missing shelfs in the fridge. Any sane judge would see that he is just gaming the system.

And some people are that much of an asshole to sue in a case like that..

I am pretty sure to get a net judgment against the defendant, but probably unable to collect from the deadbeat. I am angry at the court to allow such non-sense. After the eviction, will take it to the federal court to sue the state.

I may not be a lawyer, but I'm pretty sure you are fighting both an
uphill and a losing battle. States have sovereign immunity meaning you
can't sue them unless they agree to it. Obviously this has some
limitations such as complying with Federal laws and such. But you will
be hard pressed to try to recover any losses unless you can show they
acted with malice or denied you your rights. Since your problem is that
they followed due process, you just don't like the time it takes to do
that, I think you are just shortening further the short end of the stick
you were handed.

I know. But it will still catch their attention. Defendant did not respond to Order to Show Cause (not serving plaintiff) and the Judge did not follow through with the Order. Did the judge not understanding the Order, or the Court Order means nothing. If the court erred, they should be held accountable.

Yeah, that sounds good, but there are laws that say you can't hold the
government responsible for their actions. I'm not sure what you mean
exactly by, "Judge did not follow through with the Order". If this was
brought to the Judge's attention and he tossed it off, then maybe you
have a shot. But if you expect the Judge to keep track of the
defendant's failures, that is not really what they are there for. They
do the judging based on what is brought to their attention. Nothing more..


The Order clearly say that matters in dispute are not to be considered for TWR (temporary eviction). I don't know what defendant filed with the court.. But it's not admissible without serving plaintiff. He could lie his tail off. In his answer to Appeal Court's Order to Show Answer, no valid reason for defending UD, even if he served previously. Now, defendant's game with the system renders lower court proceeding meaningless. The lower court judge has all the information to rule on TWR, but choose not to.

I'm sorry, I can't understand what you are saying. "In his answer to
Appeal Court's Order to Show Answer, no valid reason for defending UD,
even if he served previously." What does this mean? It doesn't even
have a verb...

I do understand the final sentence which seems to be the important part.
So what was the consequence of that? You mean this gives further delays?

Yes, it forced me to appeal to the District Court and waited 5 months.

This is what i am going to file:
---------------------------------

MOTION TO QUASH DEFenDant's answer and request for temporary writ of restitution

Plaintiff requested and court issued "ORDER TO SHOW CAUSE WHY A TEMPORARY WRIT OF RESTITUTION SHOULD NOT ISSUE":
"... to show cause, if any, why the Court should not issue a Temporary Writ of Restitution, allowing Plaintiff/Landlord to remove Defendant/Tenant from the rental premises ..."

"The hearing on this Order to Show Cause is not the trial on the merits. Plaintiff/Landlord may request at a later date that a trial be set ..."

"IT IS FURTHER ORDERED that the time period for Defendant/Tenant to file an answer or other response to the Complaint for Unlawful Detainer filed in this case is hereby shortened to ten (10) calendar days from the day the Summons and Complaint for Unlawful Detainer are served on Defendant/Tenant (not counting the day of service)."

For the Complaint and Order, plaintiff filed, served and provided proof of service to the court properly. The deadline for such answer expired more than 10 days before the hearing. As of this filing, defendant did not and still have not respond to plaintiff's request for the Order to Show Cause. As a consequence, the hearing was meaningless, since there was no answer for the plaintiff to examine and nothing for the defendant to contest. The court below should have issued the Writ of Restitution immediately. Lack of such court action from below, plaintiff was forced to appeal to this court and suffers additional five months of liquidation damages.

Valid reasons to show cause include claims such as: Defendant claims ownership of property. Defendant paid plaintiff $6000 to purchase the property, rather than to rent. Plaintiff gave the property to defendant. Defendant mailed payments somewhere. Defendant paid off someone. Of course, any such claims would be subject to criminal perjury prosecution in the court of law. Defendant did not provide relevant answer and plaintiff moves the court to quash defendant's answer.

Plaintiff filed appeal to contest lower court's failure to act, due to defendant's failure to answer. This court ordered defendant to answer why there was no answer. Defendant could have blamed the post office. Defendant could have accused plaintiff of lies. Defendant could have paid off someone.. Defendant did not provide any such claims either. As a result, defendant gave up the right to contest the order. Lower court should have acted accordingly and issue the Temporary Writ of Restitution.

Plaintiff already post the maximum bond of $2500, including around $3500 in illegally detained rental payments at that time, defendant could have claimed up to $6000 from plaintiff at trial. More than enough to cover all the payments made to plaintiff previously. Lower court did not consider the facts diligently, and rejected plaintiff's motion for summary judgment on the Writ of Restitution. Did the court below not understand the order? Did the court below have a different standard for plaintiff and/or defendant? Or did the Court Order not mean anything? The court below made an error in judgment and should be held responsible and liable.

Plaintiff is ready to go to trial to address defendant's allegations. Including back rents and indemnification bond, defendant can claim up to $10,000 from plaintiff. However, plaintiff cannot claim anything from defendant, since defendant is not required to put up a dime. If defendant put the illegally detained rental money in escrow and/or bond, plaintiff is willing and ready to answer any and or allegations from defendant.

Lack of any reason not to issue the Writ, plaintiff demands this court to issue the Temporary Writ of Restitution immediately.

 

[rickman]

On 11/17/2014 11:53 AM, edward.ming.lee@gmail.com wrote:

On Monday, November 17, 2014 8:13:27 AM UTC-8, jurb...@gmail.com wrote:
If they actually squatted, they should not win the case. No disagreement there. Now if they stopped paying rent because the roof caved in or something...


In my case, the root leaked for one day, did not cave in. I spent thousands to repair it afterward. But he seems entitled to living free forever because it leaked one day. It never leaked again. This is just an excuse, if not for this, there are others. He even stated in his answer that he is withholding rent because there are missing shelfs in the fridge. Any sane judge would see that he is just gaming the system.

And some people are that much of an asshole to sue in a case like that.

I am pretty sure to get a net judgment against the defendant, but probably unable to collect from the deadbeat. I am angry at the court to allow such non-sense. After the eviction, will take it to the federal court to sue the state.

I may not be a lawyer, but I'm pretty sure you are fighting both an
uphill and a losing battle. States have sovereign immunity meaning you
can't sue them unless they agree to it. Obviously this has some
limitations such as complying with Federal laws and such. But you will
be hard pressed to try to recover any losses unless you can show they
acted with malice or denied you your rights. Since your problem is that
they followed due process, you just don't like the time it takes to do
that, I think you are just shortening further the short end of the stick
you were handed.

--

Rick

 

[rickman]

On 11/17/2014 8:46 PM, edward.ming.lee@gmail.com wrote:

On Monday, November 17, 2014 5:29:40 PM UTC-8, rickman wrote:
On 11/17/2014 11:53 AM, edward.ming.lee@gmail.com wrote:
On Monday, November 17, 2014 8:13:27 AM UTC-8, jurb...@gmail.com wrote:
If they actually squatted, they should not win the case. No disagreement there. Now if they stopped paying rent because the roof caved in or something...


In my case, the root leaked for one day, did not cave in. I spent thousands to repair it afterward. But he seems entitled to living free forever because it leaked one day. It never leaked again. This is just an excuse, if not for this, there are others. He even stated in his answer that he is withholding rent because there are missing shelfs in the fridge. Any sane judge would see that he is just gaming the system.

And some people are that much of an asshole to sue in a case like that..

I am pretty sure to get a net judgment against the defendant, but probably unable to collect from the deadbeat. I am angry at the court to allow such non-sense. After the eviction, will take it to the federal court to sue the state.

I may not be a lawyer, but I'm pretty sure you are fighting both an
uphill and a losing battle. States have sovereign immunity meaning you
can't sue them unless they agree to it. Obviously this has some
limitations such as complying with Federal laws and such. But you will
be hard pressed to try to recover any losses unless you can show they
acted with malice or denied you your rights. Since your problem is that
they followed due process, you just don't like the time it takes to do
that, I think you are just shortening further the short end of the stick
you were handed.

I know. But it will still catch their attention. Defendant did not respond to Order to Show Cause (not serving plaintiff) and the Judge did not follow through with the Order. Did the judge not understanding the Order, or the Court Order means nothing. If the court erred, they should be held accountable.

Yeah, that sounds good, but there are laws that say you can't hold the
government responsible for their actions. I'm not sure what you mean
exactly by, "Judge did not follow through with the Order". If this was
brought to the Judge's attention and he tossed it off, then maybe you
have a shot. But if you expect the Judge to keep track of the
defendant's failures, that is not really what they are there for. They
do the judging based on what is brought to their attention. Nothing more.

--

Rick

 

[LSrFieldServiceEng@Energy]

On Tuesday, November 18, 2014 6:19:17 AM UTC-5, Jan Panteltje wrote:

On a sunny day (Mon, 17 Nov 2014 15:57:39 -0800 (PST)) it happened George
Herold <gherold@teachspin.com> wrote in
336bb6db-1a25-4a45-ac53-4c6cb101725d@googlegroups.com>:

On Monday, November 17, 2014 12:45:19 AM UTC-5, Jamie M wrote:
Hi,

Here is an upcoming metal 3D printer that uses a laser for melting
metal powder layer by layer:

http://techcrunch.com/2014/07/18/matterfab/

Any idea on what type or even part# of laser this uses? There are a
couple spots in the video with a close up of it, 5minutes in.

cheers,
Jamie

Having no idea, I would guess a diode laser. I think you want a really small spot size. A lot of heat in a small volume and
something has to melt.

George H.

There are several high power IR lasers modules on ebay:
http://www.ebay.com/itm/270918321913

Which will not achieve the proper focus size he needs. It has a elliptical beam with horribly different divergence characteristics in the X and Y axis.. As do nearly all diode laser arrays.

This is one case where you want a Gaussian or Top Hat beam distribution and a high specific impulse to rapidly fuse the metal dust. While the laser listed will no doubt heat metal to incandescence, it has the beam properties of a flashlight reflector that has been crushed in a press. Even with correction optics, that laser would be a dog for this application.

Your trying to sinter a .004 inch / 100 micron layer of metal. Your spot size determines your resolution, the shape of your spot is carried over into the work. To build a uniform structure, you want to sinter that dust as fast as possible and as uniformly as possible.

That laser is an array of roughly .5 mm wide, 200 micron thick diode chips in a stack. Each chip emits a crude, elliptical beam roughly 15 degrees by 40 degrees wide.

Net result, very poor Etendue at the target.

Oh yeah, you'd fuse metal, but your finished objects would be course and look like crap. For that price you can find a used 100-150 watt industrial lamp pumped YAG laser and start to do it right. Simply because it will have much lower divergence, much better transverse beam shape, and will achieve a much, much smaller spot size.

At 100-200 watts, you'd still be low on power for this process.

Lasers are mainly what I do for a living. Yes, you can sinter thin films of metal with a 200 watt diode array. Can you overcome the heat conduction issues and fuse quality metal blocks with that laser, not as well as you might think.

Steve

 

[Adrian Tuddenham]

rickman <gnuarm@gmail.com> wrote:

I usually can figure out what people mean when they post something new
to me. But I can't grasp how an amp with a gain of 1 would be able to
do anything useful for positive feedback. But maybe I'm just not
getting it.

Think power, not voltage.


--
~ Adrian Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk

 

[Jan Panteltje]

On a sunny day (Mon, 17 Nov 2014 15:57:39 -0800 (PST)) it happened George
Herold <gherold@teachspin.com> wrote in
<336bb6db-1a25-4a45-ac53-4c6cb101725d@googlegroups.com>:

On Monday, November 17, 2014 12:45:19 AM UTC-5, Jamie M wrote:
Hi,

Here is an upcoming metal 3D printer that uses a laser for melting
metal powder layer by layer:

http://techcrunch.com/2014/07/18/matterfab/

Any idea on what type or even part# of laser this uses? There are a
couple spots in the video with a close up of it, 5minutes in.

cheers,
Jamie

Having no idea, I would guess a diode laser. I think you want a really small spot size. A lot of heat in a small volume and
something has to melt.

George H.

There are several high power IR lasers modules on ebay:
http://www.ebay.com/itm/270918321913

 

On Tuesday, November 18, 2014 7:57:46 AM UTC-8, Robert Baer wrote:

edward.ming.lee@gmail.com wrote:
On Monday, November 17, 2014 6:35:01 PM UTC-8, Robert Baer wrote:
jurb6006@gmail.com wrote:
I mean because if the defendant wins the case, the record should disappear.
Records NEVER disappear; look up any crook that has been dead for 20
years; pick a famous or infamous one where records abound andpay the
online fee.

As i indicated, defendant WON.

It say SETTLED.
* YES, that is my point! READ what i wrote; the report is INCOMPLETE and
INACCURATE.
From a legal point, the whole action should not have been reported,
due to the final court action: DISMISSED.

If it was dismissed, defendant can easily correct the record. It the agency incorrectly report, defendant can demand them to correct the record. But the record should stay, even as DISMISSED.

Whatever the cause, defendant started with an UNLAWFUL action. What is the justification for such action?

You point a gun at someone to collect debt. Yes, you are due the money, but does it make the action legal?

 

[Jan Panteltje]

On a sunny day (Tue, 18 Nov 2014 05:41:44 -0800 (PST)) it happened
"LSrFieldServiceEng@EnergyNull.com" <sroberts6328@gmail.com> wrote in
<52a7f63a-9b1a-495e-b30f-83e12068879a@googlegroups.com>:

On Tuesday, November 18, 2014 6:19:17 AM UTC-5, Jan Panteltje wrote:
On a sunny day (Mon, 17 Nov 2014 15:57:39 -0800 (PST)) it happened George
Herold <gherold@teachspin.com> wrote in
336bb6db-1a25-4a45-ac53-4c6cb101725d@googlegroups.com>:

On Monday, November 17, 2014 12:45:19 AM UTC-5, Jamie M wrote:
Hi,

Here is an upcoming metal 3D printer that uses a laser for melting
metal powder layer by layer:

http://techcrunch.com/2014/07/18/matterfab/

Any idea on what type or even part# of laser this uses? There are a
couple spots in the video with a close up of it, 5minutes in.

cheers,
Jamie

Having no idea, I would guess a diode laser. I think you want a really =
small spot size. A lot of heat in a small volume and
something has to melt.

George H.

There are several high power IR lasers modules on ebay:
http://www.ebay.com/itm/270918321913

Which will not achieve the proper focus size he needs. It has a elliptical =
beam with horribly different divergence characteristics in the X and Y axis=
. As do nearly all diode laser arrays.

This is one case where you want a Gaussian or Top Hat beam distribution and=
a high specific impulse to rapidly fuse the metal dust. While the laser l=
isted will no doubt heat metal to incandescence, it has the beam properties=
of a flashlight reflector that has been crushed in a press. Even with cor=
rection optics, that laser would be a dog for this application.

Your trying to sinter a .004 inch / 100 micron layer of metal. Your spot si=
ze determines your resolution, the shape of your spot is carried over into =
the work. To build a uniform structure, you want to sinter that dust as fas=
t as possible and as uniformly as possible.

That laser is an array of roughly .5 mm wide, 200 micron thick diode chips =
in a stack. Each chip emits a crude, elliptical beam roughly 15 degrees by =
40 degrees wide.

Net result, very poor Etendue at the target.

Oh yeah, you'd fuse metal, but your finished objects would be course and lo=
ok like crap. For that price you can find a used 100-150 watt industrial l=
amp pumped YAG laser and start to do it right. Simply because it will have =
much lower divergence, much better transverse beam shape, and will achieve =
a much, much smaller spot size.

At 100-200 watts, you'd still be low on power for this process.

Lasers are mainly what I do for a living. Yes, you can sinter thin films of=
metal with a 200 watt diode array. Can you overcome the heat conduction is=
sues and fuse quality metal blocks with that laser, not as well as you migh=
t think.

Steve

Hey, but I liked it
Just a bit too dangerous to order one and play with it.

 

[RobertMacy]

On Mon, 17 Nov 2014 13:06:30 -0700, rickman <gnuarm@gmail.com> wrote:

...snip...

Your coil though is not electrostatically shielded. The reading I have
done indicates the noise sources generate a more significant E field
which can be shielded. So my starting point was a shielded antenna.
Boosting the signal is just one part of the problem. Digging the signal
out of the noise is the other. I supposed it could be shielded easily
enough. If I go with a small coil with more turns I would use a ferrite
core. With a two inch diameter that would be a lot of ferrite.

Actually you can use a 'hollow' core. envision a 'paper towel' roll tube
made of magnetic material. The center section often does not add as much
as one would think.

Shielding is something as simple as one turn, left open, of copper tape,
wrapped around the outside of the coil. The gap prevents shorting the turn
and the broad conductive are provides electrostatic shielding. often best
to GND the tape.

...snip...
Why is a few uV "oodles of margin"?

input noise in the range of less than 10-20nV/rtHz, so lots of S/N

Not looking for beaucoup volts. I'm looking for a low power consumption
and enough volts. How would a follower give voltage gain? I have only
seen followers in a current amplification stage with no voltage gain.

I thought a follower would provide the necessary burffering and eat less
power, probably wrong. Probably get the 'gain' for free.

What? How do you get 50 uV into an accumulator? Using an ADC at 240
kSPS would totally blow the power budget.

You only care about a SINGLE frequency, so why are you proposing an ADC?
The DFT is performed by simply a synchronous detection average shoved into
an accumulator. You only get one frequency bin, but there in lies all the
information you seek.

My concept is to get the signal level high enough that it can make a
statistical difference in the state of the input. With the huge
processing gain from a very narrow bandpass filter I expect to see
several 10's of dB improvement in SNR. Rather like the way they recover
a direct sequence spread spectrum signal or more accurately very much
like a lock-in amplifier.

But I have started to doubt the ability of this circuit to work behind
the digital input on the chip. If the signal and noise are too small to
overcome any latent hysteresis in the input circuit there might be no
signal to improve. I was just trying to explore the possibility of
adding a low power consumption amplifier. As usual many people take the
discussion on many tangents. That is how I learn.

Glad you appreciate the tangents. Very much appreciate the openness to
enable the fun of contributing.

 

[Joerg]

rickman wrote:

On 11/16/2014 8:00 PM, Joerg wrote:
rickman wrote:
On 11/16/2014 6:49 PM, Joerg wrote:
rickman wrote:
On 11/16/2014 7:49 AM, RobertMacy wrote:

[...]


Why resonant antenna? You can gain significantly voltage coming in.
Envision the generated voltage creating N*2piFB*Area will be
small, but
put in a tank with Q=100 and the signals start flying around 100X
bigger, higher impedance but this is low frequency voltage.
Tapping off
the parallel resonance you just gained 100X in the incoming voltage.
Now
you need more like a buffer than a gain stage.

Note, I'm an Analog Designer from waaaay back, but sometimes going
straight to digital has its advantages.

That was what I had hoped to show with this project. I envisioned it
two years ago I believe, but put it aside and have only given it a
little thought since then.

The comment was about a tuned circuit in the drain leg of an amplifier
stage. The antenna is already tuned and the calculated Q is 90.


A word of caution here. If you rely on a Q of 90 for the input side
which low your circuit will still take in all kinds of crud. The noise
comes from myriad switch mode supplies and with an Iq of just a few
microamps that can quickly swamp your amplifier. Once that happens
everything mixes with everything else in there and the WWVB signal
might
drown.

Which switch mode supplies, in the same device or in other devices? That
is one reason why I prefer not to have an amplifier. I am investigating
what is possible with low power.


I meant power supplies in the vicinity. And not just those, there's also
tons of <100kHz noise from CFL, LED lighting, induction ranges and so on.

Low power and high unity gain bandwidth bite each other. Same for low
power and intermodulation performance.


Really good WWVB clocks had two crystals in the front end for
filtering.
"Modern" ones don't and the result is as expected. Here in the
California Sierra they don't work well anymore.

I considered a crystal, but I haven't found any good info on how to
design that and it makes the device work for only one frequency.


Designing crystal filter means bench time, simulating crystals at narrow
bandwidth is very tedious and time consuming. And yes, it only works at
one frequency.

It also means a lot of book time. I tried to look into that once but
just didn't find my info on design, including from the xtal makers. They
are all about oscillators though.

I believe you will have no other choice. Especially since you said in an
answer to Robert that you want to drive an FPGA pin with hysteresis
which is a really crummy "detector". With a Q of just 90 man-made noise
can swamp you. Unless you live in a rural neigborhood with no overhead
wiring.

... With a
tuned antenna you can adjust it for multiple frequencies of operation.
There are a number of time signals broadcast in the range of 50 to 80
kHz which could be tuned using one configuration.


You could switch crystals but that does get old when you have to cover
almost all time signal transmitters in the world.

This is not a product, but just something I'm pushing around and would
like to build. The first step is just to make it work with low power.

That's good, and gets you involved in analog. BTW, the problem in your
circuit is Miller in T2. If you reduce R6 to 100ohms T1 shows sufficient
bandwidth. So cascode is the name of the game. Got to run, our Labradors
want their morning walk but I quickly put in a BJT to show the effect.
Replace the .lib statement with yours (didn't work on my PC). V3 would
normally be replaced by a resistive divider with a bypass cap:

Version 4
SHEET 1 1340 680
WIRE 1008 -416 1008 -448
WIRE 1008 -176 1008 -336
WIRE 32 -128 -16 -128
WIRE 128 -128 32 -128
WIRE 368 -128 368 -160
WIRE 944 -128 848 -128
WIRE 128 -112 128 -128
WIRE -16 -96 -16 -128
WIRE 848 -96 848 -128
WIRE -16 0 -16 -16
WIRE 128 0 128 -48
WIRE 368 0 368 -48
WIRE 416 0 368 0
WIRE 448 0 416 0
WIRE 608 0 512 0
WIRE 768 0 608 0
WIRE 848 0 848 -16
WIRE 1008 0 1008 -80
WIRE 1152 0 1008 0
WIRE 1264 0 1152 0
WIRE 368 32 368 0
WIRE 1008 32 1008 0
WIRE 1264 48 1264 0
WIRE 240 96 -16 96
WIRE 320 96 240 96
WIRE 768 96 768 0
WIRE 832 96 768 96
WIRE 960 96 832 96
WIRE 240 144 240 96
WIRE 368 144 368 128
WIRE 448 144 368 144
WIRE 496 144 448 144
WIRE 1008 144 1008 128
WIRE 1088 144 1008 144
WIRE 1136 144 1088 144
WIRE -16 160 -16 96
WIRE 768 160 768 96
WIRE 368 176 368 144
WIRE 1008 176 1008 144
WIRE 496 192 496 144
WIRE 1136 192 1136 144
WIRE 1264 224 1264 112
WIRE 240 256 240 224
WIRE -16 288 -16 240
WIRE 368 288 368 256
WIRE 496 288 496 256
WIRE 496 288 368 288
WIRE 1008 288 1008 256
WIRE 1136 288 1136 256
WIRE 1136 288 1008 288
WIRE 368 336 368 288
WIRE 768 336 768 240
WIRE 1008 336 1008 288
FLAG 368 336 0
FLAG -16 0 0
FLAG 32 -128 V2.2
FLAG -16 96 Vin
FLAG 240 256 0
FLAG -16 288 0
FLAG 128 0 0
FLAG 368 -160 V2.2
FLAG 448 144 Vs
FLAG 1008 336 0
FLAG 1152 0 Vout
FLAG 1008 -448 V2.2
FLAG 1088 144 Vs2
FLAG 768 336 0
FLAG 416 0 G1
FLAG 608 0 Vin2
FLAG 832 96 Vin3
FLAG 1264 224 0
FLAG 848 0 0
SYMBOL voltage -16 -112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR SpiceLine Rser=1
SYMATTR InstName V1
SYMATTR Value 2.2v
SYMBOL voltage -16 144 R0
WINDOW 123 24 152 Left 2
WINDOW 39 24 124 Left 2
SYMATTR Value2 AC 1
SYMATTR SpiceLine Rser=10
SYMATTR InstName V2
SYMATTR Value SINE(0 50uV 60K)
SYMBOL res 224 128 R0
SYMATTR InstName R1
SYMATTR Value 10Meg
SYMBOL cap 112 -112 R0
SYMATTR InstName C5
SYMATTR Value 100ľF
SYMBOL res 352 -144 R0
SYMATTR InstName R3
SYMATTR Value 100k
SYMBOL njf 320 32 R0
SYMATTR InstName T1
SYMATTR Value JBF862
SYMBOL res 352 160 R0
SYMATTR InstName R2
SYMATTR Value 100k
SYMBOL cap 480 192 R0
SYMATTR InstName C1
SYMATTR Value 10ľF
SYMBOL res 992 -432 R0
SYMATTR InstName R6
SYMATTR Value 100k
SYMBOL njf 960 32 R0
SYMATTR InstName T2
SYMATTR Value JBF862
SYMBOL res 992 160 R0
SYMATTR InstName R5
SYMATTR Value 100k
SYMBOL cap 1120 192 R0
SYMATTR InstName C3
SYMATTR Value 1000nf
SYMBOL cap 448 16 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C2
SYMATTR Value 0.01ľ
SYMBOL res 752 144 R0
SYMATTR InstName R4
SYMATTR Value 10Meg
SYMBOL cap 1248 48 R0
SYMATTR InstName C4
SYMATTR Value 10pF
SYMBOL npn 944 -176 R0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL voltage 848 -112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR SpiceLine Rser=1
SYMATTR InstName V3
SYMATTR Value 1.6v
TEXT 504 -200 Left 2 !.ac dec 10 0.1 10Meg
TEXT -24 400 Left 2 !.lib spice_BF862.prm

--
Regards, Joerg

http://www.analogconsultants.com/

 

[Joerg]

rickman wrote:

On 11/17/2014 4:56 PM, whit3rd wrote:
On Sunday, November 16, 2014 5:01:35 PM UTC-8, rickman wrote:
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Xref: mx02.eternal-september.org sci.electronics.design:348164

On Sunday, November 16, 2014 5:01:35 PM UTC-8, rickman wrote:
On 11/16/2014 5:47 PM, whit3rd wrote:
On Saturday, November 15, 2014 7:18:17 PM UTC-8, rickman wrote:
On 11/4/2014 6:29 PM, rickman wrote:
I am working on a project for receiving a very narrow bandwidth
signal
at 60 kHz [and] keep the power consumption to
an absolute minimum

How about a programmable-bias-current op amp? LM4250 is easily
available, there used to be lots of others. OTAs like LM13700 have
similar
low-power specifications, with the additional feature that output loads
don't change the power requirement.

The LM4250 has too low a GBP to work at 60 kHz. The max GBW is about
300 kHz and the setting I would need brings it closer to 60,000 kHz
where it would have a gain of about 1.

Not completely relevant; remember, an amplifier performs three functions,
and voltage gain is only one. The other two, power gain (because the
output
impedance is lower than input impedance) and input/output isolation,
are enough to make this chip useful. There have been suggestions
already to use positive-feedback circuitry, and isolation REALLY helps
there.

I usually can figure out what people mean when they post something new
to me. But I can't grasp how an amp with a gain of 1 would be able to
do anything useful for positive feedback. But maybe I'm just not
getting it.

Coupling coils and a steep transformation ratio can do that. But you are
already on the right track. Such problems where ultra-low power
consumption and bandwidth requirements clash are usually best solved
with discretes. That also provides the best learning environment in the
arts of analog design. I've met many younger EEs who work in analog but
can only do IC design and work with opamps and other IC. A multi-stage
transistor-level amp throw them for a loop.

[...]

--
Regards, Joerg

http://www.analogconsultants.com/

 

[Robert Baer]

edward.ming.lee@gmail.com wrote:

On Monday, November 17, 2014 6:35:01 PM UTC-8, Robert Baer wrote:
jurb6006@gmail.com wrote:
I mean because if the defendant wins the case, the record should disappear.
Records NEVER disappear; look up any crook that has been dead for 20
years; pick a famous or infamous one where records abound andpay the
online fee.

As i indicated, defendant WON.

It say SETTLED.

* YES, that is my point! READ what i wrote; the report is INCOMPLETE and
INACCURATE.
From a legal point, the whole action should not have been reported,
due to the final court action: DISMISSED.

>
It still does not change the fact that defendant took matter into his
own hand and UNLAWFUL DETAINED property for months. Paying all the
money does not mean the action was LAWFUL. These renters should be
avoid at all cost and for good reason.

CAUSE: UND UNLAWFUL DETAINER DV:N
RESOLUTION: STPR DATE 12 06 2013 SETTLED BY PARTIES AND/OR AGREED JUDGMEN
COMPLETION: JODF DATE 12 06 2013 JUDGEMENT/ORDER/DECREE FILED
STATUS : CMPL DATE 12 06 2013 COMPLETED/RE-COMPLETE

 

Co2 is at 10.6 Microns right in the middle of a silica adsorption band. This means a expensive, exotic "Chalcogenide" fiber needs to be used. You can can get a pretty nice used BWM for the probable price of a piece of that fiber.

ND:YAG at 1.06 Microns on the other hand goes through high power silica fibers.

Jamie, Start with Jeff Hecht's book "The Laser Guidebook" and Silfvast's Book "Laser Fundamentals" before you go down this beam path.

The learning curve is extremely steep and the simplest mistakes are very expensive with high power lasers.



Steve