How's your hearing ?
 

Arny Krueger wrote:

"Misifus" wrote in message

I've opened numerous 9V batteries, they have always
contained 6 smaller, cylindrical cells. Each of the
smaller cells makes approximately 1.5V, thus giving 9V.

I've got some new EverRead Gold alkaline 9v batteries at church that measure
over 11 volts when new.

You've peaked my curiosity, I'm going to take one apart and see what is
inside.

The chemical reactions that produce the potential for all
types of dry cell batteries generally produce between
1.2V and 1.5V. In order to get higher voltages, the cells
must be combined, as they are in the 9V.

Right. I think that a typical modern alkaline is more like 1.56 volts per
cell.

I've also heard of 9 volt batteries with an extra cell for extra voltage. If
memory serves, this related to one of the rechargeable technologies, maybe
NiMh or Li.

NiMH and possibly Nicad too since the cell voltage is lower. Not sure what Li
ion's is.

Graham

How's your hearing ?
 

Andy Champ wrote:

Michael A. Terrell wrote:
David Looser wrote:
"Michael A. Terrell" wrote in message
m...


There is only one common 9V battery in the US. It is the only type
you can buy over the counter in 99% or more retail shops.
So?, it's still only one type of 9V battery, there are others.


Not to over 99% of the world's population.


The fact that the groups posted here include uk.rec.audio might be a
clue to you. Just in case - there is a world south of the Rio Grande,
North of the Great Lakes, West of Oregon and East of New York. And the
US does *not* contain 99% of its population, much as many of your
compatriots seem to think.



Yawn You didn't even include large portions of the US. We aren't as
stupid as you like to think. Tell me, How many people in third world
countries know of any 9 volt batteries, let alone have a wide choice of
types? How about China? Do they all know about more than one type?
Everything the export to the US that uses a nine volt battery uses the
one type.



Are all your posts simply attacks on Graham? or is there some point to your
existance?

Existence.


Wow! You found a typo made by someone with severe vision problems.
In fact, I only had the use of one bad eye for half of this year, and I
still have problems with the other eye. No matter, you are another
arrogant Brit so congratulations are in order for your amazing ability
to sort fly **** from pepper.


He usually pulls him dumbest stunts when he is crossposted to the
audio newsgroups where he thinks he is the ultimate audio engineer by
pointing to used crap for sale on Ebay. Since you are posting from
BTInternet and on one of the audio groups I don't expect anything
intellegent.


Intelligent.

Right pair you two. 'nuff said.


How do you equate poor eyesight with arrogance and ignorance? Of
course, I understand the British need to stand up for your village
idiot. You have so many that they need protected.


Oh yes, my BM602s are better than my ears. You are into diminishing
returns at £350 for speakers.


Then you were a fool to spend the money.


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There are two kinds of people on this earth:
The crazy, and the insane.
The first sign of insanity is denying that you're crazy.

How's your hearing ?
 

Michael A. Terrell wrote...

ell me, How many people in third world
countries know of any 9 volt batteries, let alone have a wide choice of
types? How about China? Do they all know about more than one type?
Everything the export to the US that uses a nine volt battery uses the
one type.

Using that argument I could say that China must use 240v AC as all the
Chinese built kit I have uses that voltage. Whereas you you Would say
but it must be 110V. :-)

The battery market in third world countries is driven by the lack of
line power not by the needs of portability and miniaturisation which
leads to the use of pp3 batteries, which in any current hungry
application have a life of a couple of days if that.
In SouthEast asia and Africa you are far more likely to find PP7/PP9
type batteries powering console radios and electric lanterns for which
purpose a PP3 would be hopelessly uneconomic.

I grew up in an unelectrified region of Scotland where we used kerosene
lanterns and our entertainment system was a battery powered Ever-Ready
valve table radio. These big brick sized batteries gave various HT DC
voltages 90V etc IIRC and were made of hundreds of flat zinc/carbon
cells. Cost just under half a weeks wages and lasted over a month at
about 3 hours use per day with judicious heating by the fire when they
started losing power.
And then mother used to hack us to death wi' breadknife. Eee bah gum,
you young whippersnappers etc

--
Ken
http://www.members.lycos.co.uk/buddyduck/

How's your hearing ?
 

In article ,
UnsteadyKen wrote:
I grew up in an unelectrified region of Scotland where we used kerosene
lanterns and our entertainment system was a battery powered Ever-Ready
valve table radio. These big brick sized batteries gave various HT DC
voltages 90V etc IIRC and were made of hundreds of flat zinc/carbon
cells. Cost just under half a weeks wages and lasted over a month at
about 3 hours use per day with judicious heating by the fire when they
started losing power.
And then mother used to hack us to death wi' breadknife. Eee bah gum,
you young whippersnappers etc

The better way for a 'fixed' radio was to use a lead acid for the heaters
- which took the majority of the power. Assuming you had somewhere
reasonably handy which could re-charge it. Usually the local garage. I can
remember seeing this when holidaying at Ballater on Deeside in the '50s -
it had electricity but some of the surrounding clachans didn't. The garage
charged 2d for this service. ;-)

--
*A dog's not just for Christmas, it's alright on a Friday night too*

Dave Plowman London SW
To e-mail, change noise into sound.

How's your hearing ?
 

UnsteadyKen wrote:

Michael A. Terrell wrote...

ell me, How many people in third world
countries know of any 9 volt batteries, let alone have a wide choice of
types? How about China? Do they all know about more than one type?
Everything the export to the US that uses a nine volt battery uses the
one type.

Using that argument I could say that China must use 240v AC as all the
Chinese built kit I have uses that voltage. Whereas you you Would say
but it must be 110V. :-)


110 volts? The US went to 120 volts almost 50 years ago.

Most of the Chinese electronics I see is battery powered, but the AC
powered is 120 volt to save the manufacturer a few cents for the 120-240
VAC selector switch, while others will select the proper range
automatically.


The battery market in third world countries is driven by the lack of
line power not by the needs of portability and miniaturisation which
leads to the use of pp3 batteries, which in any current hungry
application have a life of a couple of days if that.


Windup radios, and ones that use D cells or lantern batteries are
more common so they can get months or years use.


In SouthEast asia and Africa you are far more likely to find PP7/PP9
type batteries powering console radios and electric lanterns for which
purpose a PP3 would be hopelessly uneconomic.


Several UK websites say the PP7 and PP9 are 'hard to find' and 'quite
rare'. I'm sure they would be even harder to find in an African jungle.


I grew up in an unelectrified region of Scotland where we used kerosene
lanterns and our entertainment system was a battery powered Ever-Ready
valve table radio. These big brick sized batteries gave various HT DC
voltages 90V etc IIRC and were made of hundreds of flat zinc/carbon
cells. Cost just under half a weeks wages and lasted over a month at
about 3 hours use per day with judicious heating by the fire when they
started losing power.
And then mother used to hack us to death wi' breadknife. Eee bah gum,
you young whippersnappers etc


'Farm radios' in the US were 32 volts, and designed to run from the
'wincharger' that charged a bank of lead acid cells that provided a few
lights for the farmhouse and barn. They cost more than the dry 'A' 'B'
& 'C' dry cell powered radios, but could be used for several hours every
night, as well as to get the farm reports during breakfast.


Missionaries leaving for isolated places generally request cases of
Alkaline 'D' cells.


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listed, or I will not see your messages.

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your account: http://www.usenettools.net/ISP.htm


There are two kinds of people on this earth:
The crazy, and the insane.
The first sign of insanity is denying that you're crazy.

How's your hearing ?
 

In article ,
Michael A. Terrell wrote:
In SouthEast asia and Africa you are far more likely to find PP7/PP9
type batteries powering console radios and electric lanterns for which
purpose a PP3 would be hopelessly uneconomic.


Several UK websites say the PP7 and PP9 are 'hard to find' and 'quite
rare'. I'm sure they would be even harder to find in an African jungle.

PP7s aren't that common but I saw PP9s in my local B&Q (Home Depot sort of
place) recently.

Most retailers will sell anything where there's a demand. And that would
include Africa.

--
*I believe five out of four people have trouble with fractions. *

Dave Plowman London SW
To e-mail, change noise into sound.

How's your hearing ?
 

"Dave Plowman (News)" wrote:

In article ,
Michael A. Terrell wrote:
In SouthEast asia and Africa you are far more likely to find PP7/PP9
type batteries powering console radios and electric lanterns for which
purpose a PP3 would be hopelessly uneconomic.

Several UK websites say the PP7 and PP9 are 'hard to find' and 'quite
rare'. I'm sure they would be even harder to find in an African jungle.

PP7s aren't that common but I saw PP9s in my local B&Q (Home Depot sort of
place) recently.

Most retailers will sell anything where there's a demand. And that would
include Africa.


From the prices quoted I can see why they are rare. Carbon zinc
battery for more than a case of Alkaline 'D' cells?


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listed, or I will not see your messages.

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your account: http://www.usenettools.net/ISP.htm


There are two kinds of people on this earth:
The crazy, and the insane.
The first sign of insanity is denying that you're crazy.

How's your hearing ?
 

Dave Plowman (News) wrote...

The better way for a 'fixed' radio was to use a lead acid for the heaters
- which took the majority of the power. Assuming you had somewhere
reasonably handy which could re-charge it. Usually the local garage. I can
remember seeing this when holidaying at Ballater on Deeside in the '50s -
it had electricity but some of the surrounding clachans didn't. The garage
charged 2d for this service. ;-)

2d! Crivens that's a months pocket money.
We were in Midmar about 20 miles from Ballater. I don't know how far
the nearest electricity was, but remember marvelling at electric lights
for the first time when we visited relatives in Aberdeen.
I called it a "table" radio because it sat immovably on the table but
having looked on the web I see it is classed as a portable and looked
somewhat like this..
http://www.portabletubes.co.uk/portables/ersking.htm
Perhaps the handle on ours broke off in the best tradition of British
workmanship, those early plastics were hopeless and it weighed a ton.


--
Ken
http://www.members.lycos.co.uk/buddyduck/

How's your hearing ?
 

Michael A. Terrell wrote...

110 volts? The US went to 120 volts almost 50 years ago.

Doh! My bad.

Windup radios, and ones that use D cells or lantern batteries are
more common so they can get months or years use.

Yes I'd forgotten about the windup radios being introduced.
I'm stuck about 30 years in the past. And of course there are
LED lanterns available now, which I believe are more efficient
than filament bulbs. I've got a windup led torch myself.


--
Ken
http://www.members.lycos.co.uk/buddyduck/

How's your hearing ?
 

"UnsteadyKen" wrote in message
...
Dave Plowman (News) wrote...

The better way for a 'fixed' radio was to use a lead acid for the heaters
- which took the majority of the power. Assuming you had somewhere
reasonably handy which could re-charge it. Usually the local garage. I
can
remember seeing this when holidaying at Ballater on Deeside in the '50s -
it had electricity but some of the surrounding clachans didn't. The
garage
charged 2d for this service. ;-)

2d! Crivens that's a months pocket money.
We were in Midmar about 20 miles from Ballater. I don't know how far
the nearest electricity was, but remember marvelling at electric lights
for the first time when we visited relatives in Aberdeen.
I called it a "table" radio because it sat immovably on the table but
having looked on the web I see it is classed as a portable and looked
somewhat like this..
http://www.portabletubes.co.uk/portables/ersking.htm
Perhaps the handle on ours broke off in the best tradition of British
workmanship, those early plastics were hopeless and it weighed a ton.


That's an "All-Dry" portable (so-called because it used dry batteries for
both LT & HT) Clearly of great advantage when used as a portable, though as
Dave Plowman says a more economical arrangement for "fixed" sets was to use
lead acid cells for the valve filaments, which required valves with 2V
filaments.

Valves with 1.4V filaments on octal bases intended for "All-Dry" use were
introduced shortly before WW2, though the 1950s were the "All_dry" heyday,
by then using valves with 7-pin miniature bases. Mostly these were intended
as proper portables, the attaché case style being particularly popular (the
lap-top of the time?) though there were some much larger and more elaborate
All-Dry sets made, some with multiple SW wavebands, pre-mixer RF amplifiers
and even VHF FM for the those without mains.

David.