Re: How to dispose old electronics test equipment LEGALLY
On 8/29/19 3:45 PM, info@... wrote: I know this guy in the USA in North Carolina that all the time bury in
the ground electronics parts and old electronics test equipment. This
individual even sent me pictures of this activity so I have prove of
this. I was wondering how can you dispose of this legally if anyone
knows a disposal way or what companies do that, I actually have some
monitors and some old OTDR I need to dispose, and I know I cant throw in
the trash. I know this equipment has toxic materials like lead,mercury,
cadmiun, beryllium, lithium, so it is obviuos that is an illegal
activity to bury in the group like that. We're not much into "disposal" around here, man. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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How to dispose old electronics test equipment LEGALLY
I know this guy in the USA in North Carolina that all the time bury in the ground electronics parts and old electronics test equipment. This individual even sent me pictures of this activity so I have prove of this. I was wondering how can you dispose of this legally if anyone knows a disposal way or what companies do that, I actually have some monitors and some old OTDR I need to dispose, and I know I cant throw in the trash. I know this equipment has toxic materials like lead,mercury, cadmiun, beryllium, lithium, so it is obviuos that is an illegal activity to bury in the group like that.
thanks.
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I would use my eyes first, and look at the battery.
Does it have any helpful markings that give a hint
about what it is? Other than 3V 2.5A...
Is it cylindrical, or rectangular? Flat, or boxy?
Using a lithium secondary battery with any significant
current requires a battery controller that meters the
power into and out of the cells. To not use one is very
dangerous. It is also rather unlikely.
Even a lowly CR2032 is a 0.21AH cell. The Tadrian 3.6V
AA cells are 2.4AH capacity.
This is what I suspect you have, as they are very common
for backing up CMOS storage arrays. HP and Tektronix
used them all over the place...
-Chuck Harris
Bob Albert via Groups.Io wrote:
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Well Chuck I knew all that. What I don't know are the details of this particular application. In order to take proper care of the unit I do need to understand the reasons for some of the design decisions.
So my questions again, are - is this rechargeable? How much current is drawn? Do I need to replace it? What is a satisfactory substitute?
Bob
On Thursday, August 29, 2019, 09:48:29 AM PDT, Chuck Harris <cfharris@...> wrote:
Hi Bob,
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On 8/29/19 3:17 PM, Conrad, PA5Y wrote: Why would you put Sodium carbonate on your keyboard? For added flavor! I promise that my next post will have something to do with HP/Agilent or Keysight equipment. This really has been one of those days, hasn't it. ;) But I did love Carsten's query about whether one would really want to be nitpicked by a German engineer. B-) -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Re: HP 89410A (89441A) is stuck during bootup Help!
It was not completely random - I have started with single power-on key presses.? Only found that "Local" starts up HP-IB debugger.
Then, after going through service manual yet again I have noticed that, apparently, "The fault log can be displayed at power-up by pressing and holding [.] [4] while setting the power switch to on"? This, obviously, did not work but I know what you are thinking - why [4]?
So I set off to try everything else together with [.] and got lucky pretty much instantly.
Of course, restrospectively anything can be found on the Internet -
I took all the cards out, replaced the battery (which was at 0.6V) and blew the dust off them.? So NVRAM probably got rubbish stuck in it that crashed bootup very early on.
Why HP did not document this in the service manual - I have no idea.
Cheers
Leo
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Why would you put Sodium carbonate on your keyboard?
I promise that my next post will have something to do with HP/Agilent or Keysight equipment.
Regards
Conrad
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-----Original Message----- From: [email protected] < [email protected]> On Behalf Of Dave McGuire via Groups.Io Sent: 29 August 2019 20:36 To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] HP 54542A soda -> keyboard Good one, Bob! On 8/29/19 2:20 PM, Bob Albert via Groups.Io wrote: Conrad, all due respect but your apostrophe was inappropriate.
Bob
On Thursday, August 29, 2019, 10:31:58 AM PDT, Conrad, PA5Y
<g0ruz@...> wrote:
Hi Chuck, I also categorise those who speak and write in English and
those who don't. Even I my age I cannot decide the category to which
American's belong ?
73
Conrad Farlow, PA5Y
-----Original Message-----
From: [email protected]
<mailto:[email protected]>
<[email protected]
<mailto:[email protected]>> On Behalf Of Chuck
Harris via Groups.Io
Sent: 29 August 2019 18:04
To: [email protected]
<mailto:[email protected]>
Subject: Re: [HP-Agilent-Keysight-equipment] HP 54542A
I am old school, I categorize folks into two groups:? Those who speak
and write in English, and those who don't.? I pay attention to the one
group, and the other, not so much.
If my capitalization affects clarity, then by all means pick away, in
this case, it didn't... not at all.? You knew instantly what I meant,
and yet chose to... What did you choose to do?
As for why I chose, and I did choose carefully, to say AH as an
indication of energy, rather than just as charge, it was because of
guys who act like you did.
Either way I was going to take a hit.? I preferred to be precise.
3V2.5AH is an indication of the energy stored in the cell... Maybe
even exactly the energy stored in the cell when it was new, and the
phases of the moon were aligned just right, and the current you draw
isn't too much, or too little...
3V2.5A doesn't really mean much, as the OP stated.
-Chuck Harris
Carsten Bormann wrote:
On Aug 29, 2019, at 15:31, Chuck Harris <cfharris@... <mailto:cfharris@...>> wrote:
Carsten,
How is the amp hours of a cell not an indication of the energy
stored in the cell?
The cell was already identified as being 3V, as was quoted in my
reply.
I stand by my statement.
You don¡¯t like being nitpicked at by a German, right? :-)
The answer depends on what is meant by ¡°is an indication of¡±.
In the sense of ¡°wearing a Rolex is an indication of personal
·É±ð²¹±ô³Ù³ó¡±,
sure.
I read this more as ¡°is a way to determine¡±, and knowing the voltage, it sure is, but why not say what it really tells you instead?
Anyway, my nitpicking was prompted more by your unacceptable spelling
of the units, and of course we don¡¯t really correct each others¡¯
spelling on this mailing list.? This one message just happened to be
the straw that broke the camel¡¯s back.? Engineering really does
benefit from proper usage of units, as a couple of mars-bound space
vehicle designers can attest to.? And, yes, I do very much know you
flew to the moon based on equipment labeled in megacycles.
(This is getting a bit off-topic from HP 54542A scopes.? Which say 2
GSa/s on the bezel¡)
Gr¨¹?e, Carsten
-- Dave McGuire, AK4HZ New Kensington, PA
|
HP 83752B Power Supply Schematic
Hello all,m
I have a 83752B in need of SMPS repair and have not had luck locating a schematic for the PSU. Any idea where I might come across the schematic for this supply?
Best,
CJ
|
No it wasn¡¯t and I was paraphrasing after all.
?
Personally ?I marvel at people who can converse clearly in more than one language. To say that you do not pay as much attention to someone because English is not their native language is terrible
if it was actually meant. I hope that Chuck did not mean it because that attitude is not old school but it is ignorant and quite offensive to some.
?
Carsten said ¡®Engineering really does benefit from proper usage of units.¡¯
?
I have to agree.
?
Regards
?
Conrad
?
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Show quoted text
From: [email protected] <[email protected]>
On Behalf Of Bob Albert via Groups.Io
Sent: 29 August 2019 20:21
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 54542A
?
Conrad, all due respect but your apostrophe was inappropriate.
On Thursday, August 29, 2019, 10:31:58 AM PDT, Conrad, PA5Y <g0ruz@...> wrote:
Hi Chuck, I also categorise those who speak and write in English and those who don't. Even I my age I cannot decide the category
to which American's belong ?
73
Conrad Farlow, PA5Y
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Chuck Harris via Groups.Io
Sent: 29 August 2019 18:04
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 54542A
I am old school, I categorize folks into two groups:? Those who speak and write in English, and those who don't.? I pay attention to the one group, and the other, not so much.
If my capitalization affects clarity, then by all means pick away, in this case, it didn't... not at all.? You knew instantly what I meant, and yet chose to... What did you choose to do?
As for why I chose, and I did choose carefully, to say AH as an indication of energy, rather than just as charge, it was because of guys who act like you did.
Either way I was going to take a hit.? I preferred to be precise.
3V2.5AH is an indication of the energy stored in the cell... Maybe even exactly the energy stored in the cell when it was new, and the phases of the moon were aligned just right, and the current you draw isn't too much, or too little...
3V2.5A doesn't really mean much, as the OP stated.
-Chuck Harris
Carsten Bormann wrote:
> On Aug 29, 2019, at 15:31, Chuck Harris <cfharris@...> wrote:
>>
>> Carsten,
>>
>> How is the amp hours of a cell not an indication of the energy stored
>> in the cell?
>>
>> The cell was already identified as being 3V, as was quoted in my
>> reply.
>>
>> I stand by my statement.
>
> You don¡¯t like being nitpicked at by a German, right? :-)
>
> The answer depends on what is meant by ¡°is an indication of¡±.
> In the sense of ¡°wearing a Rolex is an indication of personal ·É±ð²¹±ô³Ù³ó¡±, sure.
> I read this more as ¡°is a way to determine¡±, and knowing the voltage, it sure is, but why not say what it really tells you instead?
>
> Anyway, my nitpicking was prompted more by your unacceptable spelling of the units, and of course we don¡¯t really correct each others¡¯ spelling on this mailing list.? This one message just happened to be the straw that broke the camel¡¯s back.? Engineering
really does benefit from proper usage of units, as a couple of mars-bound space vehicle designers can attest to.? And, yes, I do very much know you flew to the moon based on equipment labeled in megacycles.
>
> (This is getting a bit off-topic from HP 54542A scopes.? Which say 2
> GSa/s on the bezel¡)
>
> Gr¨¹?e, Carsten
|
soda -> keyboard
Good one, Bob!
toggle quoted message
Show quoted text
On 8/29/19 2:20 PM, Bob Albert via Groups.Io wrote: Conrad, all due respect but your apostrophe was inappropriate.
Bob
On Thursday, August 29, 2019, 10:31:58 AM PDT, Conrad, PA5Y
<g0ruz@...> wrote:
Hi Chuck, I also categorise those who speak and write in English and
those who don't. Even I my age I cannot decide the category to which
American's belong ?
73
Conrad Farlow, PA5Y
-----Original Message-----
From: [email protected]
<mailto:[email protected]>
<[email protected]
<mailto:[email protected]>> On Behalf Of Chuck
Harris via Groups.Io
Sent: 29 August 2019 18:04
To: [email protected]
<mailto:[email protected]>
Subject: Re: [HP-Agilent-Keysight-equipment] HP 54542A
I am old school, I categorize folks into two groups:? Those who speak
and write in English, and those who don't.? I pay attention to the one
group, and the other, not so much.
If my capitalization affects clarity, then by all means pick away, in
this case, it didn't... not at all.? You knew instantly what I meant,
and yet chose to... What did you choose to do?
As for why I chose, and I did choose carefully, to say AH as an
indication of energy, rather than just as charge, it was because of guys
who act like you did.
Either way I was going to take a hit.? I preferred to be precise.
3V2.5AH is an indication of the energy stored in the cell... Maybe even
exactly the energy stored in the cell when it was new, and the phases of
the moon were aligned just right, and the current you draw isn't too
much, or too little...
3V2.5A doesn't really mean much, as the OP stated.
-Chuck Harris
Carsten Bormann wrote:
On Aug 29, 2019, at 15:31, Chuck Harris <cfharris@... <mailto:cfharris@...>> wrote:
Carsten,
How is the amp hours of a cell not an indication of the energy stored
in the cell?
The cell was already identified as being 3V, as was quoted in my
reply.
I stand by my statement.
You don¡¯t like being nitpicked at by a German, right? :-)
The answer depends on what is meant by ¡°is an indication of¡±.
In the sense of ¡°wearing a Rolex is an indication of personal ·É±ð²¹±ô³Ù³ó¡±,
sure.
I read this more as ¡°is a way to determine¡±, and knowing the voltage, it sure is, but why not say what it really tells you instead?
Anyway, my nitpicking was prompted more by your unacceptable spelling
of the units, and of course we don¡¯t really correct each others¡¯
spelling on this mailing list.? This one message just happened to be the
straw that broke the camel¡¯s back.? Engineering really does benefit from
proper usage of units, as a couple of mars-bound space vehicle designers
can attest to.? And, yes, I do very much know you flew to the moon based
on equipment labeled in megacycles.
(This is getting a bit off-topic from HP 54542A scopes.? Which say 2
GSa/s on the bezel¡)
Gr¨¹?e, Carsten
--
Dave McGuire, AK4HZ
New Kensington, PA
|
Conrad, all due respect but your apostrophe was inappropriate.
Bob
On Thursday, August 29, 2019, 10:31:58 AM PDT, Conrad, PA5Y <g0ruz@...> wrote:
Hi Chuck, I also categorise those who speak and write in English and those who don't. Even I my age I cannot decide the category to which American's belong ?
73
Conrad Farlow, PA5Y
-----Original Message----- From: [email protected] < [email protected]> On Behalf Of Chuck Harris via Groups.Io Sent: 29 August 2019 18:04 To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] HP 54542A I am old school, I categorize folks into two groups:? Those who speak and write in English, and those who don't.? I pay attention to the one group, and the other, not so much. If my capitalization affects clarity, then by all means pick away, in this case, it didn't... not at all.? You knew instantly what I meant, and yet chose to... What did you choose to do? As for why I chose, and I did choose carefully, to say AH as an indication of energy, rather than just as charge, it was because of guys who act like you did. Either way I was going to take a hit.? I preferred to be precise. 3V2.5AH is an indication of the energy stored in the cell... Maybe even exactly the energy stored in the cell when it was new, and the phases of the moon were aligned just right, and the current you draw isn't too much, or too little... 3V2.5A doesn't really mean much, as the OP stated. -Chuck Harris Carsten Bormann wrote: > On Aug 29, 2019, at 15:31, Chuck Harris < cfharris@...> wrote: >> >> Carsten, >> >> How is the amp hours of a cell not an indication of the energy stored >> in the cell? >> >> The cell was already identified as being 3V, as was quoted in my >> reply. >> >> I stand by my statement. > > You don¡¯t like being nitpicked at by a German, right? :-) > > The answer depends on what is meant by ¡°is an indication of¡±. > In the sense of ¡°wearing a Rolex is an indication of personal ·É±ð²¹±ô³Ù³ó¡±, sure. > I read this more as ¡°is a way to determine¡±, and knowing the voltage, it sure is, but why not say what it really tells you instead? > > Anyway, my nitpicking was prompted more by your unacceptable spelling of the units, and of course we don¡¯t really correct each others¡¯ spelling on this mailing list.? This one message just happened to be the straw that broke the camel¡¯s back.? Engineering really does benefit from proper usage of units, as a couple of mars-bound space vehicle designers can attest to.? And, yes, I do very much know you flew to the moon based on equipment labeled in megacycles. > > (This is getting a bit off-topic from HP 54542A scopes.? Which say 2 > GSa/s on the bezel¡) > > Gr¨¹?e, Carsten
|
Hi Chuck, I also categorise those who speak and write in English and those who don't. Even I my age I cannot decide the category to which American's belong ?
73
Conrad Farlow, PA5Y
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] < [email protected]> On Behalf Of Chuck Harris via Groups.Io Sent: 29 August 2019 18:04 To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] HP 54542A I am old school, I categorize folks into two groups: Those who speak and write in English, and those who don't. I pay attention to the one group, and the other, not so much. If my capitalization affects clarity, then by all means pick away, in this case, it didn't... not at all. You knew instantly what I meant, and yet chose to... What did you choose to do? As for why I chose, and I did choose carefully, to say AH as an indication of energy, rather than just as charge, it was because of guys who act like you did. Either way I was going to take a hit. I preferred to be precise. 3V2.5AH is an indication of the energy stored in the cell... Maybe even exactly the energy stored in the cell when it was new, and the phases of the moon were aligned just right, and the current you draw isn't too much, or too little... 3V2.5A doesn't really mean much, as the OP stated. -Chuck Harris Carsten Bormann wrote: On Aug 29, 2019, at 15:31, Chuck Harris <cfharris@...> wrote:
Carsten,
How is the amp hours of a cell not an indication of the energy stored
in the cell?
The cell was already identified as being 3V, as was quoted in my
reply.
I stand by my statement.
You don¡¯t like being nitpicked at by a German, right? :-)
The answer depends on what is meant by ¡°is an indication of¡±.
In the sense of ¡°wearing a Rolex is an indication of personal ·É±ð²¹±ô³Ù³ó¡±, sure.
I read this more as ¡°is a way to determine¡±, and knowing the voltage, it sure is, but why not say what it really tells you instead?
Anyway, my nitpicking was prompted more by your unacceptable spelling of the units, and of course we don¡¯t really correct each others¡¯ spelling on this mailing list. This one message just happened to be the straw that broke the camel¡¯s back. Engineering really does benefit from proper usage of units, as a couple of mars-bound space vehicle designers can attest to. And, yes, I do very much know you flew to the moon based on equipment labeled in megacycles.
(This is getting a bit off-topic from HP 54542A scopes. Which say 2
GSa/s on the bezel¡)
Gr¨¹?e, Carsten
|
Well Chuck I knew all that.? What I don't know are the details of this particular application.? In order to take proper care of the unit I do need to understand the reasons for some of the design decisions.
So my questions again, are - is this rechargeable?? How much current is drawn?? Do I need to replace it?? What is a satisfactory substitute?
Bob
On Thursday, August 29, 2019, 09:48:29 AM PDT, Chuck Harris <cfharris@...> wrote:
Hi Bob,
There is no controversy, just some back and forth.
I am never sure what sets Tam off.? I am generally
sure his utterances rarely meet decency standards for
polite company... Whatever that means.
If the cell is rechargeable, then they must think the
circuit being backed up has too heavy of a current draw
for a normal primary cell to handle.
And, rechargeable lithium cells don't hold their charge
for nearly as long as do the primary cell kind.? So, it
may be needed capacity due to the cell's expected self
discharge rate.
-Chuck Harris
Bob Albert via Groups.Io wrote:
>? I didn't mean to start a controversy.? The energy in a cell is measured in terms of its Ampere-hour rating in conjunction with its voltage.
> Why HP chose such a large battery is beyond me.? Nobody has come forth with the information regarding the charging of this cell in the 54542A.? (My apologies for perpetuating the incorrect term 'battery' for a unit with a single cell.)
> If it is used as a keep-alive memory voltage, it needs to supply no current and thus doesn't need recharging unless its self discharge is significant.? And more than 2 Ampere-hours is major overkill.? A little CR2032 ought to be sufficient.
> I wish a schematic diagram were available.? I will learn more when I get around to opening the oscilloscope.? But since it's working well, I hesitate to muck around with it, especially in view of the many other projects I have in the works.
> Finding an exact replacement is not easy.? I have found some at somewhat lesser capacity but they aren't cheap either, and don't have solder tabs.? I know soldering to these cells isn't recommended but I have done it successfully.? I do have some stock of CR2032 cells and a couple of holders for them so that could be a way to go.? These are not rechargeable.
> If someone would please step in and clear the air here I would much appreciate it.
> Bob
|
Hi Bob,
There is no controversy, just some back and forth.
I am never sure what sets Tam off. I am generally
sure his utterances rarely meet decency standards for
polite company... Whatever that means.
If the cell is rechargeable, then they must think the
circuit being backed up has too heavy of a current draw
for a normal primary cell to handle.
And, rechargeable lithium cells don't hold their charge
for nearly as long as do the primary cell kind. So, it
may be needed capacity due to the cell's expected self
discharge rate.
-Chuck Harris
Bob Albert via Groups.Io wrote:
toggle quoted message
Show quoted text
I didn't mean to start a controversy. The energy in a cell is measured in terms of its Ampere-hour rating in conjunction with its voltage.
Why HP chose such a large battery is beyond me. Nobody has come forth with the information regarding the charging of this cell in the 54542A. (My apologies for perpetuating the incorrect term 'battery' for a unit with a single cell.)
If it is used as a keep-alive memory voltage, it needs to supply no current and thus doesn't need recharging unless its self discharge is significant. And more than 2 Ampere-hours is major overkill. A little CR2032 ought to be sufficient.
I wish a schematic diagram were available. I will learn more when I get around to opening the oscilloscope. But since it's working well, I hesitate to muck around with it, especially in view of the many other projects I have in the works.
Finding an exact replacement is not easy. I have found some at somewhat lesser capacity but they aren't cheap either, and don't have solder tabs. I know soldering to these cells isn't recommended but I have done it successfully. I do have some stock of CR2032 cells and a couple of holders for them so that could be a way to go. These are not rechargeable.
If someone would please step in and clear the air here I would much appreciate it.
Bob
|
I didn't mean to start a controversy.? The energy in a cell is measured in terms of its Ampere-hour rating in conjunction with its voltage.
Why HP chose such a large battery is beyond me.? Nobody has come forth with the information regarding the charging of this cell in the 54542A.? (My apologies for perpetuating the incorrect term 'battery' for a unit with a single cell.)
If it is used as a keep-alive memory voltage, it needs to supply no current and thus doesn't need recharging unless its self discharge is significant.? And more than 2 Ampere-hours is major overkill.? A little CR2032 ought to be sufficient.
I wish a schematic diagram were available.? I will learn more when I get around to opening the oscilloscope.? But since it's working well, I hesitate to muck around with it, especially in view of the many other projects I have in the works.
Finding an exact replacement is not easy.? I have found some at somewhat lesser capacity but they aren't cheap either, and don't have solder tabs.? I know soldering to these cells isn't recommended but I have done it successfully.? I do have some stock of CR2032 cells and a couple of holders for them so that could be a way to go.? These are not rechargeable.
If someone would please step in and clear the air here I would much appreciate it.
Bob
On Thursday, August 29, 2019, 09:05:40 AM PDT, Tam Hanna <tamhan@...> wrote:
Can you all stop bitching and moaning please. You sound like a MILF den when the champagne runs out. Despicable. But: I liked the Rohde document. Even though I generally deeply dislike RuS, their work on fundamental physics is great. I also liked their document on Bel units, sadly it was in German.
With best regards Tam HANNA (emailing on a BlackBerry PRIV) Enjoy electronics? Join 14k other followers by visiting the Crazy Electronics Lab at Am 29. August 2019 18:04:06 MESZ schrieb Chuck Harris <cfharris@...>:
I am old school, I categorize folks into two groups: Those who
speak and write in English, and those who don't. I pay attention
to the one group, and the other, not so much.
If my capitalization affects clarity, then by all means pick away,
in this case, it didn't... not at all. You knew instantly what I
meant, and yet chose to... What did you choose to do?
As for why I chose, and I did choose carefully, to say AH as an
indication of energy, rather than just as charge, it was because
of guys who act like you did.
Either way I was going to take a hit. I preferred to be precise.
3V2.5AH is an indication of the energy stored in the cell... Maybe
even exactly the energy stored in the cell when it was new, and the
phases of the moon were aligned just right, and the current you
draw isn't too much, or too little...
3V2.5A doesn't really mean much, as the OP stated.
-Chuck Harris
Carsten Bormann wrote:
On Aug 29, 2019, at 15:31, Chuck Harris <cfharris@...> wrote:
Carsten,
How is the amp hours of a cell not an indication of the energy
stored in the cell?
The cell was already identified as being 3V, as was quoted in my
reply.
I stand by my statement.
You don¡¯t like being nitpicked at by a German, right? :-)
The answer depends on what is meant by ¡°is an indication of¡±.
In the sense of ¡°wearing a Rolex is an indication of personal ·É±ð²¹±ô³Ù³ó¡±, sure.
I read this more as ¡°is a way to determine¡±, and knowing the voltage, it sure is, but why not say what it really tells you instead?
Anyway, my nitpicking was prompted more by your unacceptable spelling of the units, and of course we don¡¯t really correct each others¡¯ spelling on this mailing list. This one message just happened to be the straw that broke the camel¡¯s back. Engineering really does benefit from proper usage of units, as a couple of mars-bound space vehicle designers can attest to. And, yes, I do very much know you flew to the moon based on equipment labeled in megacycles.
(This is getting a bit off-topic from HP 54542A scopes. Which say 2 GSa/s on the bezel¡)
Gr¨¹?e, Carsten
Groups.io Links: You receive all messages sent to this group.
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Unsubscribe: /g/HP-Agilent-Keysight-equipment/leave/defanged [tamhan@...]
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Can you all stop bitching and moaning please. You sound like a MILF den when the champagne runs out. Despicable. But: I liked the Rohde document. Even though I generally deeply dislike RuS, their work on fundamental physics is great. I also liked their document on Bel units, sadly it was in German.
With best regards Tam HANNA (emailing on a BlackBerry PRIV) Enjoy electronics? Join 14k other followers by visiting the Crazy Electronics Lab at Am 29. August 2019 18:04:06 MESZ schrieb Chuck Harris <cfharris@...>:
toggle quoted message
Show quoted text
I am old school, I categorize folks into two groups: Those who
speak and write in English, and those who don't. I pay attention
to the one group, and the other, not so much.
If my capitalization affects clarity, then by all means pick away,
in this case, it didn't... not at all. You knew instantly what I
meant, and yet chose to... What did you choose to do?
As for why I chose, and I did choose carefully, to say AH as an
indication of energy, rather than just as charge, it was because
of guys who act like you did.
Either way I was going to take a hit. I preferred to be precise.
3V2.5AH is an indication of the energy stored in the cell... Maybe
even exactly the energy stored in the cell when it was new, and the
phases of the moon were aligned just right, and the current you
draw isn't too much, or too little...
3V2.5A doesn't really mean much, as the OP stated.
-Chuck Harris
Carsten Bormann wrote:
On Aug 29, 2019, at 15:31, Chuck Harris <cfharris@...> wrote:
Carsten,
How is the amp hours of a cell not an indication of the energy
stored in the cell?
The cell was already identified as being 3V, as was quoted in my
reply.
I stand by my statement.
You don¡¯t like being nitpicked at by a German, right? :-)
The answer depends on what is meant by ¡°is an indication of¡±.
In the sense of ¡°wearing a Rolex is an indication of personal ·É±ð²¹±ô³Ù³ó¡±, sure.
I read this more as ¡°is a way to determine¡±, and knowing the voltage, it sure is, but why not say what it really tells you instead?
Anyway, my nitpicking was prompted more by your unacceptable spelling of the units, and of course we don¡¯t really correct each others¡¯ spelling on this mailing list. This one message just happened to be the straw that broke the camel¡¯s back. Engineering really does benefit from proper usage of units, as a couple of mars-bound space vehicle designers can attest to. And, yes, I do very much know you flew to the moon based on equipment labeled in megacycles.
(This is getting a bit off-topic from HP 54542A scopes. Which say 2 GSa/s on the bezel¡)
Gr¨¹?e, Carsten
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I am old school, I categorize folks into two groups: Those who
speak and write in English, and those who don't. I pay attention
to the one group, and the other, not so much.
If my capitalization affects clarity, then by all means pick away,
in this case, it didn't... not at all. You knew instantly what I
meant, and yet chose to... What did you choose to do?
As for why I chose, and I did choose carefully, to say AH as an
indication of energy, rather than just as charge, it was because
of guys who act like you did.
Either way I was going to take a hit. I preferred to be precise.
3V2.5AH is an indication of the energy stored in the cell... Maybe
even exactly the energy stored in the cell when it was new, and the
phases of the moon were aligned just right, and the current you
draw isn't too much, or too little...
3V2.5A doesn't really mean much, as the OP stated.
-Chuck Harris
Carsten Bormann wrote:
toggle quoted message
Show quoted text
On Aug 29, 2019, at 15:31, Chuck Harris <cfharris@...> wrote:
Carsten,
How is the amp hours of a cell not an indication of the energy
stored in the cell?
The cell was already identified as being 3V, as was quoted in my
reply.
I stand by my statement.
You don¡¯t like being nitpicked at by a German, right? :-)
The answer depends on what is meant by ¡°is an indication of¡±.
In the sense of ¡°wearing a Rolex is an indication of personal ·É±ð²¹±ô³Ù³ó¡±, sure.
I read this more as ¡°is a way to determine¡±, and knowing the voltage, it sure is, but why not say what it really tells you instead?
Anyway, my nitpicking was prompted more by your unacceptable spelling of the units, and of course we don¡¯t really correct each others¡¯ spelling on this mailing list. This one message just happened to be the straw that broke the camel¡¯s back. Engineering really does benefit from proper usage of units, as a couple of mars-bound space vehicle designers can attest to. And, yes, I do very much know you flew to the moon based on equipment labeled in megacycles.
(This is getting a bit off-topic from HP 54542A scopes. Which say 2 GSa/s on the bezel¡)
Gr¨¹?e, Carsten
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Re: HP 89410A (89441A) is stuck during bootup Help!
On Thu, Aug 29, 2019 at 11:17 AM Doug Bercich < doug@...> wrote: Wow. So are there other instruments that behave this way that led you to this guess? I don¡¯t think you just started pressing keys while cycling power and got lucky on the 13th out of 10,000 combos.?
...? Maybe my card shuffle inadvertently cleared my own NVRAM? Who knows?
In the HP8643A and its brethren, there's a backup battery on the CPU board. This battery powers NVRAM on the CPU board that stores user configuration and self-calibration information. However, the battery is looped through the edge connector and the system board back to the NVRAM. This is done to make sure that the NVRAM is cleared if e.g. a CPU board is moved from one instrument to another. Maybe your?89441 does the same...
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Re: HP 89410A (89441A) is stuck during bootup Help!
Wow. So are there other instruments that behave this way that led you to this guess? I don¡¯t think you just started pressing keys while cycling power and got lucky on the 13th out of 10,000 combos.?
I had this exact problem on my 89441 - bought used, of course; worked for awhile. Then this same thing happened. The reason I didn¡¯t contribute was that I ¡°fixed¡± it by opening it up, checking voltages and indicator LEDs (all fine), pulling cards and cleaning and reseating in frustration that nothing appeared amiss. After putting things together, it worked. Never makes you feel good! (And not really a fix).
Maybe my card shuffle inadvertently cleared my own NVRAM? Who knows?
The ¡°press enter while powering up¡± only interrupts the self tests. This ¡°fatal¡± error (complete with tombstone icon!) must occur earlier in the machine¡¯s initialization.?
Anyway, thanks for posting your fix. I¡¯m putting that in the folder for that instrument!
Best regards, Doug
On Thu, Aug 29, 2019 at 2:59 AM Leo Bodnar < leo@...> wrote: Thanks for the replies, guys.
I seem to have revived it by erasing its NVRAM by holding down [.] and [0] keys while simultaneously cycling the power.?
It's not in the service manual so it was a pretty lucky guess.
Cheers
Leo
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On Aug 29, 2019, at 15:31, Chuck Harris <cfharris@...> wrote:
Carsten,
How is the amp hours of a cell not an indication of the energy
stored in the cell?
The cell was already identified as being 3V, as was quoted in my
reply.
I stand by my statement.
You don¡¯t like being nitpicked at by a German, right? :-) The answer depends on what is meant by ¡°is an indication of¡±. In the sense of ¡°wearing a Rolex is an indication of personal ·É±ð²¹±ô³Ù³ó¡±, sure. I read this more as ¡°is a way to determine¡±, and knowing the voltage, it sure is, but why not say what it really tells you instead? Anyway, my nitpicking was prompted more by your unacceptable spelling of the units, and of course we don¡¯t really correct each others¡¯ spelling on this mailing list. This one message just happened to be the straw that broke the camel¡¯s back. Engineering really does benefit from proper usage of units, as a couple of mars-bound space vehicle designers can attest to. And, yes, I do very much know you flew to the moon based on equipment labeled in megacycles. (This is getting a bit off-topic from HP 54542A scopes. Which say 2 GSa/s on the bezel¡) Gr¨¹?e, Carsten
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Re: HP8643A Displays Result Code 14.020122
Greetings,
?
????
This result code seems to be a common one for the 8643a.?
????
As has been pointed out, the PS is a conglomeration of COTS units, but the CLIP
does have the interconnects.
???
? ?????Back
in May of 2016 the 14.020122 annoyance advanced to the point where my 8643a generator
became VERY flaky.?
????
It would loose PL, and simply not run reliably. The top cover was removed and
the voltages measured.?
? ???The
-5 was previously -4.83, but now had dropped to -4.41. ?Bootstrapping a
bench supply proved that
????
restoring -5 would make the RF reliable again.
?
????
The power supplies were removed and setup for testing on the bench.
????
The clear suspect was the black brick DC to DC that took in +24 and generates
the -5.
????
This is on the leftmost board that filters the outputs of the two main
switchers.?
?????
It was powered up with a +24 V bench supply, loaded with 30 ohms, and produced
5.22 volts.?
????
The entire supply was then AC powered up, and no obvious problem could be
found.
????
The instrument was partially re-assembled,
and the -5 NOW is -5.18 under load.
?
????
?Go figure.? PS self test now passes and instrument powers up without
the painful ¡°calibration¡± cycle.
?
???
??My best guess is it was ?a contact problem given all the
connectors and the removal and reinsertion cleared the fault. ???
?
????
?As of August 2019 .... it is still working fine. ?No component
changes.
????
HTH as they say
.....
?
Dick
Sent from?a Logic Free?Asylum
deep within The?Sanctuary State?of California using?my phoneI.
Bibimus Ergo Sumus, En Vino Veritas, Quaerite et Invenietis, Illegitimi non Carborundum
?
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Dave McGuire
Doug Bercich
Dick Benson