Driver to drive?

[Uncle Steve]

On Mon, Feb 04, 2013 at 07:46:54PM -0800, josephkk wrote:

On Sun, 03 Feb 2013 09:39:39 -0500, Uncle Steve <stevet810@gmail.com
wrote:

On Sat, Feb 02, 2013 at 08:48:41PM -0500, Bob Engelhardt wrote:
On 2/2/2013 11:09 AM, Uncle Steve wrote:
When I've properly broken in my new drivers I'll make a youtube video
so you can hear the results for yourself....

No emoticon, so I assume that he's serious. In which case, even though
I know nothing about what he's talking about, I do know that he is full
of shit. Youtube ... gimme a break!!! Bob

It was a joke, but several people were bound to mistake it for a
serious proposition.

Perhaps I will make a youtube video and see what people say.


Regards,

Uncle Steve

If only you would take your sig to heart.

?=/

I think I have a reasonably thorough apprehension of the text I quote
in my .sig. What do you think I am missing?


Regards,

Uncle Steve

--
More than a century has passed since science laid down sound
propositions as to the origins of the universe, but how many have
mastered them or possess the really scientific spirit of criticism? A
few thousands at the outside, who are lost in the midst of hundreds of
millions still steeped in prejudices and superstitions worthy of
savages, who are consequently ever ready to serve as puppets for
religious impostors. -- Peter Kropotkin

 

[Uncle Steve]

On Sat, Feb 02, 2013 at 07:28:27AM -0800, John Larkin wrote:

On Fri, 01 Feb 2013 21:14:21 -0500, Uncle Steve <stevet810@gmail.com> wrote:

Recently, I had the experience of re-manufacturing the tweeters in a
pair of speakers I had bought. Due to a "senior moment", I fried the
tweeters in a pair of Quadral Chromium Style 50 speakers, and
the local dealer decided to fuck me over even though I admitted the
mistake and paid for replacements. Why they decided to screw with me
is another story, no doubt involving elements of the RCMP who would
prefer not to be named. At any rate, I was left with a pair of
drivers with unequal efficiency, and it annoyed the living snot out of
me.

So I decided to take the two broken tweeters and rehabilitate them.
If you look into the Quadral speaker line, you will discover that the
tweeters use a filament suspended between two powerful magnets in
series with a 5.1 ohm resister. The filament is apparently a piece of
aluminum coated with a thin layer of titanium, or something to that
effect. My replacement is somewhat thinner, and required the
manufacture of unique tooling to shape.

The result has less mass and consequently improved the sensitivity of
the driver, with obvious implications to the resultant sound quality.

My amplifier is an Onkyo M282, which is apparently an amplifier that
uses negative feedback, and made in Japan. On the Web, there are a
number of articles which articulate the controversy over NFB amp
designs, with numerous manufacturers shunning the technique for
various reasons. None of the descriptions or reviews take into
account the most important factor in an audio system -- the
interaction of the speakers with the amplifier.

I believe I have achieved such good results primarily because I
reduced the "mass" of the tweeter, which in combination with the
amplifier design, has helped produce a superior sound. The key to
understanding the thinking behind this is the interaction of the
amplifier with the speakers.

Speakers are an inductive load, AFAIK, which means they present some
of the same problems as electric motors in the design of driver
circuitry. In the instance of an audio signal, the drivers have a
hysteresis contingent upon their ability to accelerate in the presence
of a electrical impetus. In my nascent understanding of electronic
circuits, this resistance to movement will interfere with the
amplifier output in the same way a naive power supply will drop-out
under load.

The negative feedback circuitry in the amplifier will detect this
drop-out and drive its input harder as a result, thereby reducing
perceived distortion.

In the available literature there is talk of the "delay" that results
from the signal excursion that occurs from amplifier distortion before
it is corrected. I would suggest that this "delay" is imaginary for
the reason that the negative feedback circuitry in fact operates
essentially instantaneously, and applies a continuous correction.

It is worth noting that distortion at the amplifier output is a result
of two sources: firstly there is the distortion introduced by the gain
stages in the amplifier, and secondly, distortion introduced by the
mass of the drivers, which interact with the magnets and impose an
inductive signal on the amplifier output. In either case, the
negative feedback circuitry should nearly instantaneously apply a
corrective factor to the input signal which will effectively coerce
the drivers to conform to the shape of the input signal -- if the NFB
circuitry is not too weak or slow.

My suspicion is that by reducing the mass of the tweeters in my
system, I have relieved a burden from the NFB circuitry in the Onkyo
M282, and thereby improved the resultant sound quality by an order of
magnitude or so.

The apparent controversy over the effectiveness of NFB amp designs
seems to ignore the amplifier-speaker relationship, and the role it
plays in fidelity. An ideal speaker would have no electric mass, and
would therefore have zero influence (or load, I guess) on the
amplifier, and would obviously reproduce the amplifier signal
perfectly. Loudspeakers must necessarily have mass, if only
represented by the air they displace, and will therefore affect the
amplifier by virtue of inductance. Consequently it is my feeling that
negative feedback amplifier designs represent a good solution to the
practical problem of signal reproduction.

In thinking about this subject, it has occurred to me that a NFB amp
will perform better if the speakers it drives are more expensive than
another, all things being equal. Even ambient noise in the listening
environment might affect the negative feedback circuitry.

Perhaps obviously, I have no test equipment to use to measure the
effects or phenomenon that is at issue. Just my common sense. But
if you were here, you would be able to attest to the fidelity of the
ultimate result.

Comments and constructive criticism is welcome.


Regards,

Uncle Steve


Audio is such nonsense.

This is a little bit like a gun-control debate. Lots of audio
equipment is garbage/too expensive/whatever primarily because the
people who make it are too often contemptuous of the consumer, and the
consumer is also too often ignorant to understand what he is doing.
In no case is it the fault of 'audio'.


Regards,

Uncle Steve

--
More than a century has passed since science laid down sound
propositions as to the origins of the universe, but how many have
mastered them or possess the really scientific spirit of criticism? A
few thousands at the outside, who are lost in the midst of hundreds of
millions still steeped in prejudices and superstitions worthy of
savages, who are consequently ever ready to serve as puppets for
religious impostors. -- Peter Kropotkin

 

[Uncle Steve]

On Mon, Feb 04, 2013 at 08:37:16PM -0800, josephkk wrote:

On Sun, 03 Feb 2013 10:43:06 -0500, Uncle Steve <stevet810@gmail.com
wrote:


there have been speakers with dual coils where one was used for feed
back, afair it
had problems with varying coupling between the coils

The most interesting one and probably the one that works the best, was
a piezo disc
glued to the center dome measuring acceleration to do a full PID
regulator, reducing
distortion and setting the response

That's crazy. But the best way would probably be laser
interferometry with a tiny mirror glued to the driver. Not sure what
you'd use as a sensor.

I can see it now. Someone will jam a Raspberry PI in their speakers
and run the correcting factor back to the amp over Gigahertz Ethernet


Bawg, i do detest the Gbit/s Ethernet being used way stupidly as a panacea
buzz word. Does nobody understand that Ethernet has uncontrolled latency?
Packets may arrive out of order? For snot sake if you want to ship
digitized audio (or video for that matter) data fast with controlled
latency and guaranteed in order reception use D1 or any of several SMPTE
Standard protocols.

[still boiling mad]

I'm not quite sure why you are so upset. I was merely temporizing,
and I think most people here understand the difference between
high-speed interconnects and broadcast-oriented transports like
Ethernet in the context of actually building something to move bits
around.


Regards,

Uncle Steve

--
More than a century has passed since science laid down sound
propositions as to the origins of the universe, but how many have
mastered them or possess the really scientific spirit of criticism? A
few thousands at the outside, who are lost in the midst of hundreds of
millions still steeped in prejudices and superstitions worthy of
savages, who are consequently ever ready to serve as puppets for
religious impostors. -- Peter Kropotkin

 

[Uncle Steve]

On Mon, Feb 04, 2013 at 08:40:22PM -0800, josephkk wrote:

On Sun, 03 Feb 2013 10:43:06 -0500, Uncle Steve <stevet810@gmail.com
wrote:


That's all for low frequency like subwoofers but that is also where
most of the problems
are

You seem to be saying that the voicecoil in low/mid drivers is the
primary target of negative feedback, but would it not also apply to
the high-frequency signal components? To what extent I could not
guess. I suppose it depends on the design, but people tend to forget
that the nominal 20kHz range of human hearing isn't the whole
enchilada, and there are several ultrasonic applications where signal
fidelity is fairly critical -- like those imaging devices they use to
examine a foetus to determine gender and general health of its
development.


Regards,

Uncle Steve

Please don't mix (or mistake of conflate) apples and tarantulas.

Tarantulas are supposedly quite tame unless mishandled or otherwise
aggravated. I have no meaningful experience with apples so I cannot
comment further.



Regards,

Uncle Steve

--
More than a century has passed since science laid down sound
propositions as to the origins of the universe, but how many have
mastered them or possess the really scientific spirit of criticism? A
few thousands at the outside, who are lost in the midst of hundreds of
millions still steeped in prejudices and superstitions worthy of
savages, who are consequently ever ready to serve as puppets for
religious impostors. -- Peter Kropotkin

 

On Mon, 04 Feb 2013 20:37:16 -0800, josephkk
<joseph_barrett@sbcglobal.net> wrote:

On Sun, 03 Feb 2013 10:43:06 -0500, Uncle Steve <stevet810@gmail.com
wrote:


there have been speakers with dual coils where one was used for feed
back, afair it
had problems with varying coupling between the coils

The most interesting one and probably the one that works the best, was
a piezo disc
glued to the center dome measuring acceleration to do a full PID
regulator, reducing
distortion and setting the response

That's crazy. But the best way would probably be laser
interferometry with a tiny mirror glued to the driver. Not sure what
you'd use as a sensor.

I can see it now. Someone will jam a Raspberry PI in their speakers
and run the correcting factor back to the amp over Gigahertz Ethernet


Bawg, i do detest the Gbit/s Ethernet being used way stupidly as a panacea
buzz word. Does nobody understand that Ethernet has uncontrolled latency?
Packets may arrive out of order? For snot sake if you want to ship
digitized audio (or video for that matter) data fast with controlled
latency and guaranteed in order reception use D1 or any of several SMPTE
Standard protocols.

[still boiling mad]

Ethernet-AVB

 

On Tue, 5 Feb 2013 08:54:52 +0100, "Robert Lacoste"
<see-alciom-dot-com@none.com> wrote:

"Tim Wescott" wrote in message
news:mo6dnSkf66xU1Y3MnZ2dnUVZ_qSdnZ2d@giganews.com...
Just got this from my kid:
Does anyone even _make_ RPN calculators any more?

Hi Tim,
The HP35s of course, but it is in my opinion far from the usual HP
calculator quality standard. In particular a couple of annoying bugs makes
life difficult (in particular the strange way of hiding the exponent on the
rightmost part of the display with large numbers, a good way to get
erroneous results except if you are clever enough to shoft left the
display...)
A far better choice : get your hands on one of the "HP15C limited edition"
series that HP sold last year. Very close to the original !

Apparently they're sill available (pricey, though).

http://www.samsoncables.com/catalog/prodDetail.cfm?Prod_ID=434&Sku=HP15C

 

[qrk]

On Mon, 04 Feb 2013 19:30:22 -0800, John Larkin
<jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Mon, 04 Feb 2013 16:01:57 -0800, Joerg <invalid@invalid.invalid> wrote:

Tim Wescott wrote:
Just got this from my kid:

"Also, a cool birthday present would be an RPN calculator with a
three-stack display, stack switch, and variable base log. Or even any
(non-graphing) calculator with variable base log function (realcalc is
nice, but only has log base 10 and log base e, and I don't like my
graphing calculator. Also I can't use realcalc for tests)."

Does anyone even _make_ RPN calculators any more?


Yup. Hewlett-Packard

http://www.walmart.com/ip/HP-35S-Scientific-Calculator/6015793

The 35S is pretty terrible, a mockery of the wonderful HP35. I mostly use ebay
32SII's.

Agreed about the 35S being a sad excuse for a calculator except for
complex number handling. Base conversion and operation is absolutely
horrid. It's obvious that the designers of the 35S haven't used HP's
flagship calculators. However, it's still better than using an
algebraic calculator.

 

[Joerg]

qrk wrote:

On Mon, 04 Feb 2013 19:30:22 -0800, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Mon, 04 Feb 2013 16:01:57 -0800, Joerg <invalid@invalid.invalid> wrote:

Tim Wescott wrote:
Just got this from my kid:

"Also, a cool birthday present would be an RPN calculator with a
three-stack display, stack switch, and variable base log. Or even any
(non-graphing) calculator with variable base log function (realcalc is
nice, but only has log base 10 and log base e, and I don't like my
graphing calculator. Also I can't use realcalc for tests)."

Does anyone even _make_ RPN calculators any more?

Yup. Hewlett-Packard

http://www.walmart.com/ip/HP-35S-Scientific-Calculator/6015793
The 35S is pretty terrible, a mockery of the wonderful HP35. I mostly use ebay
32SII's.

Agreed about the 35S being a sad excuse for a calculator except for
complex number handling. Base conversion and operation is absolutely
horrid. It's obvious that the designers of the 35S haven't used HP's
flagship calculators. However, it's still better than using an
algebraic calculator.

If the trusty old HP11C breaks down one day like my Texas SR-50 has,
then the question ist what alternative are there really? A smart phone
is certainly not an alternative for me.

--
Regards, Joerg

http://www.analogconsultants.com/

 

On Tue, 05 Feb 2013 10:52:00 -0800, qrk <SpamTrap@spam.net> wrote:

On Mon, 04 Feb 2013 19:30:22 -0800, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Mon, 04 Feb 2013 16:01:57 -0800, Joerg <invalid@invalid.invalid> wrote:

Tim Wescott wrote:
Just got this from my kid:

"Also, a cool birthday present would be an RPN calculator with a
three-stack display, stack switch, and variable base log. Or even any
(non-graphing) calculator with variable base log function (realcalc is
nice, but only has log base 10 and log base e, and I don't like my
graphing calculator. Also I can't use realcalc for tests)."

Does anyone even _make_ RPN calculators any more?


Yup. Hewlett-Packard

http://www.walmart.com/ip/HP-35S-Scientific-Calculator/6015793

The 35S is pretty terrible, a mockery of the wonderful HP35. I mostly use ebay
32SII's.

Agreed about the 35S being a sad excuse for a calculator except for
complex number handling. Base conversion and operation is absolutely
horrid.

I've only used one calculator that handled bases, other than 10,
properly, and that was an app for a PalmPilot.

It's obvious that the designers of the 35S haven't used HP
flagship calculators. However, it's still better than using an
algebraic calculator.

You got that right. I still like it, though it's nothing compared to
a 10 or 45.

 

[Allan Herriman]

On Tue, 05 Feb 2013 10:55:59 -0800, Joerg wrote:

qrk wrote:
On Mon, 04 Feb 2013 19:30:22 -0800, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Mon, 04 Feb 2013 16:01:57 -0800, Joerg <invalid@invalid.invalid
wrote:

Tim Wescott wrote:
Just got this from my kid:

"Also, a cool birthday present would be an RPN calculator with a
three-stack display, stack switch, and variable base log. Or even
any (non-graphing) calculator with variable base log function
(realcalc is nice, but only has log base 10 and log base e, and I
don't like my graphing calculator. Also I can't use realcalc for
tests)."

Does anyone even _make_ RPN calculators any more?

Yup. Hewlett-Packard

http://www.walmart.com/ip/HP-35S-Scientific-Calculator/6015793
The 35S is pretty terrible, a mockery of the wonderful HP35. I mostly
use ebay 32SII's.

Agreed about the 35S being a sad excuse for a calculator except for
complex number handling. Base conversion and operation is absolutely
horrid. It's obvious that the designers of the 35S haven't used HP's
flagship calculators. However, it's still better than using an
algebraic calculator.


If the trusty old HP11C breaks down one day like my Texas SR-50 has,
then the question ist what alternative are there really? A smart phone
is certainly not an alternative for me.

I understand that the HP-badged calculators are made by the same company
that makes the TI-badged ones.

I lost my HP15C when some luggage was stolen at LAX. I have yet to find
anything that comes close to being a replacement.

Allan

 

[Ian Field]

"Tim Williams" <tmoranwms@charter.net> wrote in message
news:keku69$6s1$1@dont-email.me...

AFAIK, pyroelectric sensors are a "single pixel" sort of thing, so they
don't know if the scene is moving, only if the average IR changes. Which
it does when someone comes into view or jumps out of the shadows,

If you mean PIR motion detectors, they usually have twin element pyrometers
(thin film thermistor) a motion of a IR source (person) is "grated" to
produce a gross change from one element to the other - this is done in
various ways such as Freznel type lenses (special IR transparent material)
and faceted surface reflecting reflectors.

 

[Ian Field]

<trader4@optonline.net> wrote in message
news:68dc88eb-af9d-4cc2-9b59-fe75ee33309c@r3g2000yqd.googlegroups.com...

On Feb 3, 1:55 am, Phil Hobbs <pcdhSpamMeSensel...@electrooptical.net
wrote:
On 2/3/2013 1:41 AM, John Doe wrote:

"Tim Williams" <tmoranwms charter.net> wrote:

AFAIK, pyroelectric sensors are a "single pixel" sort of thing,
so they don't know if the scene is moving, only if the average
IR changes.

That's all I want. It's not going to be the only part of the
system, and I can interpret the output. I guess it could even be a
very short (1 second or less) on time by a common passive infrared
motion detector, so that it would flash during its detection time.

I don't know about this particular sensor, but most of the commercial
PIR elements for porch lights have the FET built in. Maybe the 47k is
the source resistor of the JFET follower?

Cheers

Phil Hobbs



I doubt he's going to find a finished product that does what
he wants. The products ready to be mounted have not
only the sensor, but as he points, out the circuitry that
turns it into some kind of on/off output that is needed for
the product.

However those motion detector products use ICs which
he can probably find.

Most of the examples I pulled apart and hand traced the circuit years ago,
were based on the LM324.

 

[Jim Thompson]

On Tue, 05 Feb 2013 10:52:00 -0800, qrk <SpamTrap@spam.net> wrote:

On Mon, 04 Feb 2013 19:30:22 -0800, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Mon, 04 Feb 2013 16:01:57 -0800, Joerg <invalid@invalid.invalid> wrote:

Tim Wescott wrote:
Just got this from my kid:

"Also, a cool birthday present would be an RPN calculator with a
three-stack display, stack switch, and variable base log. Or even any
(non-graphing) calculator with variable base log function (realcalc is
nice, but only has log base 10 and log base e, and I don't like my
graphing calculator. Also I can't use realcalc for tests)."

Does anyone even _make_ RPN calculators any more?


Yup. Hewlett-Packard

http://www.walmart.com/ip/HP-35S-Scientific-Calculator/6015793

The 35S is pretty terrible, a mockery of the wonderful HP35. I mostly use ebay
32SII's.

Agreed about the 35S being a sad excuse for a calculator except for
complex number handling. Base conversion and operation is absolutely
horrid. It's obvious that the designers of the 35S haven't used HP's
flagship calculators. However, it's still better than using an
algebraic calculator.

As one raised on Algebra... before calculators ever existed... I
prefer Algebraic calculators.

To me RPN seems so... so... so Polish >:-}

Besides Spice behavioral models aren't in RPN, they're Algebraic.

...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[Roberto Waltman]

Allan Herriman wrote:

I lost my HP15C when some luggage was stolen at LAX. I have yet to find
anything that comes close to being a replacement.

I have been wondering for a while, if there are enough old geezers
around to justify manufacturing a (small run of) an HP'ish calculator.

The one I would like:

* HP-25 form factor, with one or two additional button rows to
accommodate more functions. Robust 'clicky' buttons.
* Two or three line RED LEDs, (not negotiable,) alphanumeric display.
Dimmable to extend battery life.
* High capacity batteries / long battery life. Separate backup battery
to preserve user programs if the main battery is depleted. (Unless
everything goes to flash memory)
* Running on an appropriate ARM processor. Downloadable firmware, of
course, so you can have a scientific version, a financial version, an
[fill the blank] engineering version, an astrological version.
* Standard USB connector for recharging and transferring data to/from
computers.

What would you add?
--
Roberto Waltman

[ Please reply to the group,
return address is invalid ]

 

[Jamie]

Ian Field wrote:

"Tim Williams" <tmoranwms@charter.net> wrote in message
news:keku69$6s1$1@dont-email.me...

AFAIK, pyroelectric sensors are a "single pixel" sort of thing, so
they don't know if the scene is moving, only if the average IR
changes. Which it does when someone comes into view or jumps out of
the shadows,


If you mean PIR motion detectors, they usually have twin element
pyrometers (thin film thermistor) a motion of a IR source (person) is
"grated" to produce a gross change from one element to the other - this
is done in various ways such as Freznel type lenses (special IR
transparent material) and faceted surface reflecting reflectors.

That's strange that you would call them thermistors? TO me a thermistor
is a slow reacting device? But yet we have an application where we use a
basic pyroelectric 3 wire detector for detecting vibration of small
conductor as it exits from an induction heater. This vibration can get
up to around 1khz or more when the wire snaps for what ever reason.

I would think a thermistor device would be a little slow for this
wouldn't you?

Maybe the units I used have different smoke in side.

Jamie

 

[Michael A. Terrell]

Fred Bartoli wrote:

Jim Thompson a écrit :
On Tue, 05 Feb 2013 15:28:23 +0100, Fred Bartoli <" "> wrote:

[snip]
Hey, that'll put some 'spread spectrum-ness' into the FB loop.
(another nice buzz word that'll magically save the world)
Or better, if you push to the limit, you'll get to 'fractal feed-back'
(tm), which obviously is the ultimate in 'distortion dithering' (tm) and
BSOAR (BullShit Optimized Audio Reproduction).

I like that, "BSOAR" >:-}


Yeah, that's the kind of bullshit that soars above the audio fields,
with two expectations:
- first, tickle some of your hot spots
- second break down any rationality

Rationality & Audio in one sentence?

 

On Tue, 05 Feb 2013 17:58:01 -0500, Roberto Waltman
<usenet@rwaltman.com> wrote:

Allan Herriman wrote:
I lost my HP15C when some luggage was stolen at LAX. I have yet to find
anything that comes close to being a replacement.

I have been wondering for a while, if there are enough old geezers
around to justify manufacturing a (small run of) an HP'ish calculator.

The one I would like:

* HP-25 form factor, with one or two additional button rows to
accommodate more functions. Robust 'clicky' buttons.
* Two or three line RED LEDs, (not negotiable,) alphanumeric display.
Dimmable to extend battery life.
* High capacity batteries / long battery life. Separate backup battery
to preserve user programs if the main battery is depleted. (Unless
everything goes to flash memory)
* Running on an appropriate ARM processor. Downloadable firmware, of
course, so you can have a scientific version, a financial version, an
[fill the blank] engineering version, an astrological version.
* Standard USB connector for recharging and transferring data to/from
computers.

It's called a "smart phone".

>What would you add?

 

[Jim Thompson]

On Tue, 05 Feb 2013 20:03:37 -0500, krw@attt.bizz wrote:

On Tue, 05 Feb 2013 17:58:01 -0500, Roberto Waltman
usenet@rwaltman.com> wrote:

Allan Herriman wrote:
I lost my HP15C when some luggage was stolen at LAX. I have yet to find
anything that comes close to being a replacement.

I have been wondering for a while, if there are enough old geezers
around to justify manufacturing a (small run of) an HP'ish calculator.

The one I would like:

* HP-25 form factor, with one or two additional button rows to
accommodate more functions. Robust 'clicky' buttons.
* Two or three line RED LEDs, (not negotiable,) alphanumeric display.
Dimmable to extend battery life.
* High capacity batteries / long battery life. Separate backup battery
to preserve user programs if the main battery is depleted. (Unless
everything goes to flash memory)
* Running on an appropriate ARM processor. Downloadable firmware, of
course, so you can have a scientific version, a financial version, an
[fill the blank] engineering version, an astrological version.
* Standard USB connector for recharging and transferring data to/from
computers.

It's called a "smart phone".

What would you add?

I'm of the old school that believes phones are for talking, not
surfing. What I'd like to find is a basic phone that can do inductive
charging.

...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

On Tue, 05 Feb 2013 18:08:29 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Tue, 05 Feb 2013 20:03:37 -0500, krw@attt.bizz wrote:

On Tue, 05 Feb 2013 17:58:01 -0500, Roberto Waltman
usenet@rwaltman.com> wrote:

Allan Herriman wrote:
I lost my HP15C when some luggage was stolen at LAX. I have yet to find
anything that comes close to being a replacement.

I have been wondering for a while, if there are enough old geezers
around to justify manufacturing a (small run of) an HP'ish calculator.

The one I would like:

* HP-25 form factor, with one or two additional button rows to
accommodate more functions. Robust 'clicky' buttons.
* Two or three line RED LEDs, (not negotiable,) alphanumeric display.
Dimmable to extend battery life.
* High capacity batteries / long battery life. Separate backup battery
to preserve user programs if the main battery is depleted. (Unless
everything goes to flash memory)
* Running on an appropriate ARM processor. Downloadable firmware, of
course, so you can have a scientific version, a financial version, an
[fill the blank] engineering version, an astrological version.
* Standard USB connector for recharging and transferring data to/from
computers.

It's called a "smart phone".

What would you add?

I'm of the old school that believes phones are for talking, not
surfing. What I'd like to find is a basic phone that can do inductive
charging.

What's the matter Thompson? Killfiles broken? ...or are you lying
again.

 

[Jim Thompson]

On Tue, 05 Feb 2013 20:16:13 -0500, krw@attt.bizz wrote:

On Tue, 05 Feb 2013 18:08:29 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Tue, 05 Feb 2013 20:03:37 -0500, krw@attt.bizz wrote:

On Tue, 05 Feb 2013 17:58:01 -0500, Roberto Waltman
usenet@rwaltman.com> wrote:

Allan Herriman wrote:
I lost my HP15C when some luggage was stolen at LAX. I have yet to find
anything that comes close to being a replacement.

I have been wondering for a while, if there are enough old geezers
around to justify manufacturing a (small run of) an HP'ish calculator.

The one I would like:

* HP-25 form factor, with one or two additional button rows to
accommodate more functions. Robust 'clicky' buttons.
* Two or three line RED LEDs, (not negotiable,) alphanumeric display.
Dimmable to extend battery life.
* High capacity batteries / long battery life. Separate backup battery
to preserve user programs if the main battery is depleted. (Unless
everything goes to flash memory)
* Running on an appropriate ARM processor. Downloadable firmware, of
course, so you can have a scientific version, a financial version, an
[fill the blank] engineering version, an astrological version.
* Standard USB connector for recharging and transferring data to/from
computers.

It's called a "smart phone".

What would you add?

I'm of the old school that believes phones are for talking, not
surfing. What I'd like to find is a basic phone that can do inductive
charging.

What's the matter Thompson? Killfiles broken? ...or are you lying
again.

I grant an annual amnesty period... to see if anyone has mellowed.
You're barely passing so far ;-)

Mostly I now just killfile profound assholes... like Larkin.

I can add you back in, if you like >:-}

...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.