led's

[Phil Hobbs]

On 08/05/2013 04:30 PM, Ian Field wrote:

"John Larkin" <jlarkin@highlandtechnology.com> wrote in message
news:3h0009pdat645kbjtq6lq97qe371tapgpj@4ax.com...
On Mon, 5 Aug 2013 20:12:11 +0100, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Larkin" <jlarkin@highlandtechnology.com> wrote in message
news:hvsvv8hgvg71og8q9sguaeavmqmdbcen9i@4ax.com...
On Sat, 03 Aug 2013 17:32:27 -0500, John Fields
jfields@austininstruments.com> wrote:

On Sat, 3 Aug 2013 20:49:36 +0100, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
message
news:j2kqv8h5o1ee7soju61guatk37gmmhrfv3@4ax.com...
On Sat, 3 Aug 2013 18:44:58 +0100, "Ian Field"
gangprobing.alien@ntlworld.com
wrote:



"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
message
news:b6bqv8demo1lahn0sbfcvdo6scpoqcdla9@4ax.com...
On Sat, 3 Aug 2013 16:26:06 +0100, "Ian Field"
gangprobing.alien@ntlworld.com
wrote:



"Jasen Betts" <jasen@xnet.co.nz> wrote in message
news:ktha04$ku1$1@gonzo.reversiblemaps.ath.cx...
On 2013-08-02, John Larkin <jlarkin@highlandtechnology.com
wrote:

The filament is a heated thermistor that makes its own
turbulence
in
the gas. Gotta be noisy.

Flashlight bulbs used to be "filled" with a vacuum, I think
they're
using krypton in some now.


Last time I checked - the only way you can buy a flashlight
bulb is
buy
a
flashlight with one in it.

You can buy spare Maglite bulbs.

I bought a Maglite - and quickly formed the conclusion that they're
overrated.

A 3W LED flashlight is brighter, uses less batteries and the 'bulb'
will
probably outlast me.

The Maglites are physically very rugged, sealed, waterproof. Lots of
LED
lights
are junk and *don't* last long. The Maglite bulbs last because such
lights
are
not used for weeks at a time. They usually have a spare inside, too.

I got stuck in the dark on a cliff-side hiking trail on the north
coast
of
Kauai. The sun goes down fast, splat-sizzle, at that latitude,
and then
the
killer frogs attack.

Have you been licking toads again!!!

(If you're playing sniper in the jungle - you can stick a frog on
the end
of
your rifle to quench the muzzle flash).

---
Quenching the muzzle flash is of no use at all when using a supersonic
projectile traversing a long distance, which is what snipers do, since
the flash will have died out long before the target is rendered meat
and the direction of the shot undiscernable.

You seem to assume that a single shot always takes out every enemy
resource, so advertising your location is no big deal.

Ha!

You expected better from that dumbass!!!

There are radar systems that track incoming rounds and fire on the
enemy guns even before the enemy rounds hit the ground. It wouldn't at
all surprise me if an M1 tank can put a cannon round on a sniper's
muzzle flash in a second or two, before the sniper's round even
bounces off the tank.

But anyone who knows so much about Ohm's Law is probably an expert on
military matters, too.

I could do with a scaled down version of that tracking radar.

In this hot weather with all the windows open, loads of flies get in,
the fly-spray seems inefective unless you score a direct hit (in some
cases you have to literally drown the little fuckers!) - the bastards
come in low & fast so its difficult to draw a bead on them.

I recommend appropriate technology: a screened window with a box fan
sitting in it.

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

 

[Fred Abse]

On Mon, 05 Aug 2013 16:35:17 +0200, tuinkabouter wrote:

Element 14 was called farnell.

Still are. Premier Farnell, PLC.

They are at least in the UK, Germany,

Austria and the Netherlands. I do not know if they have connections with
Newark.

Farnell have owned Newark for more than ten years.


Their instruments division (now gone) used to own Wayne Kerr.


Alan Farnell started the company selling components to UK radio repair
shops, out of a suitcase.

--
"Design is the reverse of analysis"
(R.D. Middlebrook)

 

[John Fields]

On Tue, 06 Aug 2013 10:35:49 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

On 08/05/2013 04:30 PM, Ian Field wrote:


"John Larkin" <jlarkin@highlandtechnology.com> wrote in message
news:3h0009pdat645kbjtq6lq97qe371tapgpj@4ax.com...
On Mon, 5 Aug 2013 20:12:11 +0100, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Larkin" <jlarkin@highlandtechnology.com> wrote in message
news:hvsvv8hgvg71og8q9sguaeavmqmdbcen9i@4ax.com...
On Sat, 03 Aug 2013 17:32:27 -0500, John Fields
jfields@austininstruments.com> wrote:

On Sat, 3 Aug 2013 20:49:36 +0100, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
message
news:j2kqv8h5o1ee7soju61guatk37gmmhrfv3@4ax.com...
On Sat, 3 Aug 2013 18:44:58 +0100, "Ian Field"
gangprobing.alien@ntlworld.com
wrote:



"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
message
news:b6bqv8demo1lahn0sbfcvdo6scpoqcdla9@4ax.com...
On Sat, 3 Aug 2013 16:26:06 +0100, "Ian Field"
gangprobing.alien@ntlworld.com
wrote:



"Jasen Betts" <jasen@xnet.co.nz> wrote in message
news:ktha04$ku1$1@gonzo.reversiblemaps.ath.cx...
On 2013-08-02, John Larkin <jlarkin@highlandtechnology.com
wrote:

The filament is a heated thermistor that makes its own
turbulence
in
the gas. Gotta be noisy.

Flashlight bulbs used to be "filled" with a vacuum, I think
they're
using krypton in some now.


Last time I checked - the only way you can buy a flashlight
bulb is
buy
a
flashlight with one in it.

You can buy spare Maglite bulbs.

I bought a Maglite - and quickly formed the conclusion that they're
overrated.

A 3W LED flashlight is brighter, uses less batteries and the 'bulb'
will
probably outlast me.

The Maglites are physically very rugged, sealed, waterproof. Lots of
LED
lights
are junk and *don't* last long. The Maglite bulbs last because such
lights
are
not used for weeks at a time. They usually have a spare inside, too.

I got stuck in the dark on a cliff-side hiking trail on the north
coast
of
Kauai. The sun goes down fast, splat-sizzle, at that latitude,
and then
the
killer frogs attack.

Have you been licking toads again!!!

(If you're playing sniper in the jungle - you can stick a frog on
the end
of
your rifle to quench the muzzle flash).

---
Quenching the muzzle flash is of no use at all when using a supersonic
projectile traversing a long distance, which is what snipers do, since
the flash will have died out long before the target is rendered meat
and the direction of the shot undiscernable.

You seem to assume that a single shot always takes out every enemy
resource, so advertising your location is no big deal.

---
On the contrary, my point was that with the advent of modern smokeless
powders and muzzle flash suppressors, a sniper's position won't be
betrayed whether or not he hits the target with the first round.

More than likely, though, as I understand it, he will. [hit the target
with the first round]
---

There are radar systems that track incoming rounds and fire on the
enemy guns even before the enemy rounds hit the ground.

---
Artillery or mortar rounds, perhaps, but certainly not small arms
fire.
---

It wouldn't at
all surprise me if an M1 tank can put a cannon round on a sniper's
muzzle flash in a second or two, before the sniper's round even
bounces off the tank.

---
I don't believe snipers are supposed to shoot at hardened targets, and
leave that job to those with greater firepower, since their job is to
kill people, one at a time, with impunity.

Besides, where's the radar information revealing the sniper's location
coming from?
---

But anyone who knows so much about Ohm's Law is probably an expert on
military matters, too.

---
It's all just tactics.
---

I could do with a scaled down version of that tracking radar.

In this hot weather with all the windows open, loads of flies get in,
the fly-spray seems inefective unless you score a direct hit (in some
cases you have to literally drown the little fuckers!) - the bastards
come in low & fast so its difficult to draw a bead on them.

I recommend appropriate technology: a screened window with a box fan
sitting in it.

Cheers

Phil Hobbs

---
Excellent!

--
JF

 

[John Larkin]

On Tue, 06 Aug 2013 15:27:30 -0500, John Fields
<jfields@austininstruments.com> wrote:

On Tue, 06 Aug 2013 10:35:49 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

On 08/05/2013 04:30 PM, Ian Field wrote:


"John Larkin" <jlarkin@highlandtechnology.com> wrote in message
news:3h0009pdat645kbjtq6lq97qe371tapgpj@4ax.com...
On Mon, 5 Aug 2013 20:12:11 +0100, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Larkin" <jlarkin@highlandtechnology.com> wrote in message
news:hvsvv8hgvg71og8q9sguaeavmqmdbcen9i@4ax.com...
On Sat, 03 Aug 2013 17:32:27 -0500, John Fields
jfields@austininstruments.com> wrote:

On Sat, 3 Aug 2013 20:49:36 +0100, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
message
news:j2kqv8h5o1ee7soju61guatk37gmmhrfv3@4ax.com...
On Sat, 3 Aug 2013 18:44:58 +0100, "Ian Field"
gangprobing.alien@ntlworld.com
wrote:



"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
message
news:b6bqv8demo1lahn0sbfcvdo6scpoqcdla9@4ax.com...
On Sat, 3 Aug 2013 16:26:06 +0100, "Ian Field"
gangprobing.alien@ntlworld.com
wrote:



"Jasen Betts" <jasen@xnet.co.nz> wrote in message
news:ktha04$ku1$1@gonzo.reversiblemaps.ath.cx...
On 2013-08-02, John Larkin <jlarkin@highlandtechnology.com
wrote:

The filament is a heated thermistor that makes its own
turbulence
in
the gas. Gotta be noisy.

Flashlight bulbs used to be "filled" with a vacuum, I think
they're
using krypton in some now.


Last time I checked - the only way you can buy a flashlight
bulb is
buy
a
flashlight with one in it.

You can buy spare Maglite bulbs.

I bought a Maglite - and quickly formed the conclusion that they're
overrated.

A 3W LED flashlight is brighter, uses less batteries and the 'bulb'
will
probably outlast me.

The Maglites are physically very rugged, sealed, waterproof. Lots of
LED
lights
are junk and *don't* last long. The Maglite bulbs last because such
lights
are
not used for weeks at a time. They usually have a spare inside, too.

I got stuck in the dark on a cliff-side hiking trail on the north
coast
of
Kauai. The sun goes down fast, splat-sizzle, at that latitude,
and then
the
killer frogs attack.

Have you been licking toads again!!!

(If you're playing sniper in the jungle - you can stick a frog on
the end
of
your rifle to quench the muzzle flash).

---
Quenching the muzzle flash is of no use at all when using a supersonic
projectile traversing a long distance, which is what snipers do, since
the flash will have died out long before the target is rendered meat
and the direction of the shot undiscernable.

You seem to assume that a single shot always takes out every enemy
resource, so advertising your location is no big deal.

---
On the contrary, my point was that with the advent of modern smokeless
powders and muzzle flash suppressors, a sniper's position won't be
betrayed whether or not he hits the target with the first round.

More than likely, though, as I understand it, he will. [hit the target
with the first round]
---

There are radar systems that track incoming rounds and fire on the
enemy guns even before the enemy rounds hit the ground.

---
Artillery or mortar rounds, perhaps, but certainly not small arms
fire.

Why not?

http://www.engadget.com/2011/03/17/us-army-to-deploy-individual-gunshot-detector-essentially-a-rad/

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=12&cad=rja&ved=0CDYQFjABOAo&url=http%3A%2F%2Fadsabs.harvard.edu%2Fabs%2F1999SPIE.3577..231B&ei=KGABUpvBMcuxigKerYGYBQ&usg=AFQjCNGo6VbeK6oJNF5fgJqLskCSOkp0pw&sig2=yRTeND8Oa0bHyC1wkOrdkw&bvm=bv.50310824,d.cGE

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=12&cad=rja&ved=0CDYQFjABOAo&url=http%3A%2F%2Fadsabs.harvard.edu%2Fabs%2F1999SPIE.3577..231B&ei=KGABUpvBMcuxigKerYGYBQ&usg=AFQjCNGo6VbeK6oJNF5fgJqLskCSOkp0pw&sig2=yRTeND8Oa0bHyC1wkOrdkw&bvm=bv.50310824,d.cGE


P2, col 1, 80 millisec response time to slew a reply weapon.




--

John Larkin Highland Technology, Inc

jlarkin at highlandtechnology dot com
http://www.highlandtechnology.com

Precision electronic instrumentation
Picosecond-resolution Digital Delay and Pulse generators
Custom laser drivers and controllers
Photonics and fiberoptic TTL data links
VME thermocouple, LVDT, synchro acquisition and simulation

 

[John Fields]

On Tue, 06 Aug 2013 13:50:43 -0700, John Larkin
<jlarkin@highlandtechnology.com> wrote:

On Tue, 06 Aug 2013 15:27:30 -0500, John Fields
jfields@austininstruments.com> wrote:

On Tue, 06 Aug 2013 10:35:49 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

On 08/05/2013 04:30 PM, Ian Field wrote:


"John Larkin" <jlarkin@highlandtechnology.com> wrote in message
news:3h0009pdat645kbjtq6lq97qe371tapgpj@4ax.com...
On Mon, 5 Aug 2013 20:12:11 +0100, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Larkin" <jlarkin@highlandtechnology.com> wrote in message
news:hvsvv8hgvg71og8q9sguaeavmqmdbcen9i@4ax.com...
On Sat, 03 Aug 2013 17:32:27 -0500, John Fields
jfields@austininstruments.com> wrote:

On Sat, 3 Aug 2013 20:49:36 +0100, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
message
news:j2kqv8h5o1ee7soju61guatk37gmmhrfv3@4ax.com...
On Sat, 3 Aug 2013 18:44:58 +0100, "Ian Field"
gangprobing.alien@ntlworld.com
wrote:



"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
message
news:b6bqv8demo1lahn0sbfcvdo6scpoqcdla9@4ax.com...
On Sat, 3 Aug 2013 16:26:06 +0100, "Ian Field"
gangprobing.alien@ntlworld.com
wrote:



"Jasen Betts" <jasen@xnet.co.nz> wrote in message
news:ktha04$ku1$1@gonzo.reversiblemaps.ath.cx...
On 2013-08-02, John Larkin <jlarkin@highlandtechnology.com
wrote:

The filament is a heated thermistor that makes its own
turbulence
in
the gas. Gotta be noisy.

Flashlight bulbs used to be "filled" with a vacuum, I think
they're
using krypton in some now.


Last time I checked - the only way you can buy a flashlight
bulb is
buy
a
flashlight with one in it.

You can buy spare Maglite bulbs.

I bought a Maglite - and quickly formed the conclusion that they're
overrated.

A 3W LED flashlight is brighter, uses less batteries and the 'bulb'
will
probably outlast me.

The Maglites are physically very rugged, sealed, waterproof. Lots of
LED
lights
are junk and *don't* last long. The Maglite bulbs last because such
lights
are
not used for weeks at a time. They usually have a spare inside, too.

I got stuck in the dark on a cliff-side hiking trail on the north
coast
of
Kauai. The sun goes down fast, splat-sizzle, at that latitude,
and then
the
killer frogs attack.

Have you been licking toads again!!!

(If you're playing sniper in the jungle - you can stick a frog on
the end
of
your rifle to quench the muzzle flash).

---
Quenching the muzzle flash is of no use at all when using a supersonic
projectile traversing a long distance, which is what snipers do, since
the flash will have died out long before the target is rendered meat
and the direction of the shot undiscernable.

You seem to assume that a single shot always takes out every enemy
resource, so advertising your location is no big deal.

---
On the contrary, my point was that with the advent of modern smokeless
powders and muzzle flash suppressors, a sniper's position won't be
betrayed whether or not he hits the target with the first round.

More than likely, though, as I understand it, he will. [hit the target
with the first round]
---

There are radar systems that track incoming rounds and fire on the
enemy guns even before the enemy rounds hit the ground.

---
Artillery or mortar rounds, perhaps, but certainly not small arms
fire.

Why not?

http://www.engadget.com/2011/03/17/us-army-to-deploy-individual-gunshot-detector-essentially-a-rad/

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=12&cad=rja&ved=0CDYQFjABOAo&url=http%3A%2F%2Fadsabs.harvard.edu%2Fabs%2F1999SPIE.3577..231B&ei=KGABUpvBMcuxigKerYGYBQ&usg=AFQjCNGo6VbeK6oJNF5fgJqLskCSOkp0pw&sig2=yRTeND8Oa0bHyC1wkOrdkw&bvm=bv.50310824,d.cGE

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=12&cad=rja&ved=0CDYQFjABOAo&url=http%3A%2F%2Fadsabs.harvard.edu%2Fabs%2F1999SPIE.3577..231B&ei=KGABUpvBMcuxigKerYGYBQ&usg=AFQjCNGo6VbeK6oJNF5fgJqLskCSOkp0pw&sig2=yRTeND8Oa0bHyC1wkOrdkw&bvm=bv.50310824,d.cGE


P2, col 1, 80 millisec response time to slew a reply weapon.

---
By then the target would have been eliminated, and the reply
unimportant.

\
--
JF

 

[Phil Hobbs]

On 8/6/2013 4:50 PM, John Larkin wrote:

On Tue, 06 Aug 2013 15:27:30 -0500, John Fields
jfields@austininstruments.com> wrote:

On Tue, 06 Aug 2013 10:35:49 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

On 08/05/2013 04:30 PM, Ian Field wrote:


"John Larkin" <jlarkin@highlandtechnology.com> wrote in message
news:3h0009pdat645kbjtq6lq97qe371tapgpj@4ax.com...
On Mon, 5 Aug 2013 20:12:11 +0100, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Larkin" <jlarkin@highlandtechnology.com> wrote in message
news:hvsvv8hgvg71og8q9sguaeavmqmdbcen9i@4ax.com...
On Sat, 03 Aug 2013 17:32:27 -0500, John Fields
jfields@austininstruments.com> wrote:

On Sat, 3 Aug 2013 20:49:36 +0100, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
message
news:j2kqv8h5o1ee7soju61guatk37gmmhrfv3@4ax.com...
On Sat, 3 Aug 2013 18:44:58 +0100, "Ian Field"
gangprobing.alien@ntlworld.com
wrote:



"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
message
news:b6bqv8demo1lahn0sbfcvdo6scpoqcdla9@4ax.com...
On Sat, 3 Aug 2013 16:26:06 +0100, "Ian Field"
gangprobing.alien@ntlworld.com
wrote:



"Jasen Betts" <jasen@xnet.co.nz> wrote in message
news:ktha04$ku1$1@gonzo.reversiblemaps.ath.cx...
On 2013-08-02, John Larkin <jlarkin@highlandtechnology.com
wrote:

The filament is a heated thermistor that makes its own
turbulence
in
the gas. Gotta be noisy.

Flashlight bulbs used to be "filled" with a vacuum, I think
they're
using krypton in some now.


Last time I checked - the only way you can buy a flashlight
bulb is
buy
a
flashlight with one in it.

You can buy spare Maglite bulbs.

I bought a Maglite - and quickly formed the conclusion that they're
overrated.

A 3W LED flashlight is brighter, uses less batteries and the 'bulb'
will
probably outlast me.

The Maglites are physically very rugged, sealed, waterproof. Lots of
LED
lights
are junk and *don't* last long. The Maglite bulbs last because such
lights
are
not used for weeks at a time. They usually have a spare inside, too.

I got stuck in the dark on a cliff-side hiking trail on the north
coast
of
Kauai. The sun goes down fast, splat-sizzle, at that latitude,
and then
the
killer frogs attack.

Have you been licking toads again!!!

(If you're playing sniper in the jungle - you can stick a frog on
the end
of
your rifle to quench the muzzle flash).

---
Quenching the muzzle flash is of no use at all when using a supersonic
projectile traversing a long distance, which is what snipers do, since
the flash will have died out long before the target is rendered meat
and the direction of the shot undiscernable.

You seem to assume that a single shot always takes out every enemy
resource, so advertising your location is no big deal.

---
On the contrary, my point was that with the advent of modern smokeless
powders and muzzle flash suppressors, a sniper's position won't be
betrayed whether or not he hits the target with the first round.

More than likely, though, as I understand it, he will. [hit the target
with the first round]
---

There are radar systems that track incoming rounds and fire on the
enemy guns even before the enemy rounds hit the ground.

---
Artillery or mortar rounds, perhaps, but certainly not small arms
fire.

Why not?

http://www.engadget.com/2011/03/17/us-army-to-deploy-individual-gunshot-detector-essentially-a-rad/

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=12&cad=rja&ved=0CDYQFjABOAo&url=http%3A%2F%2Fadsabs.harvard.edu%2Fabs%2F1999SPIE.3577..231B&ei=KGABUpvBMcuxigKerYGYBQ&usg=AFQjCNGo6VbeK6oJNF5fgJqLskCSOkp0pw&sig2=yRTeND8Oa0bHyC1wkOrdkw&bvm=bv.50310824,d.cGE

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=12&cad=rja&ved=0CDYQFjABOAo&url=http%3A%2F%2Fadsabs.harvard.edu%2Fabs%2F1999SPIE.3577..231B&ei=KGABUpvBMcuxigKerYGYBQ&usg=AFQjCNGo6VbeK6oJNF5fgJqLskCSOkp0pw&sig2=yRTeND8Oa0bHyC1wkOrdkw&bvm=bv.50310824,d.cGE


P2, col 1, 80 millisec response time to slew a reply weapon.




Those are actually even cooler than you'd think--they have to use a

bunch of near-field acoustics tricks to reduce the size of the
microphone array and keep the angular resolution. BBN was working on
that sort of stuff five years or so when I visited them in Cambridge MA.

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 USA
+1 845 480 2058

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