Russ Andrews and Ben Duncan :-)
 

In article ,
UnsteadyKen wrote:
Can anyone explain what Kitty is on about? Why would you have a guy
'watching leads'?

The current draw when jump starting an HGV or coach is enough to
vaporise a standard set of jump leads.

Err, why would you use 'standard' jump leads to start something that takes
a great deal more current than a car? Unless you're Kitty, obviously.

Even using a set of super heavy
duty it is advisable to have somebody watching them to make sure that
they are not overheating, if the insulation melts and the cables sag
and touch metal then Bang!

Then they're not 'super heavy duty' enough. Or does the cable twixt
battery and starter routinely melt on such vehicles?

--
*When you've seen one shopping centre you've seen a mall*

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

Russ Andrews and Ben Duncan :-)
 

"Rob" wrote


That's pretty impressive - it'd take me a while (if ever) to get anything
as sharp.


You already did - see:

http://www.moirac.adsl24.co.uk/RobPhonos.jpg

I suspect your pic was a straightforward Jpeg and *unsharpened*?

Much as I prefer not to use any 'sharpening' it is advisable (if not
unavoidable) to apply a whiff of USM (Unsharp Mask)

http://en.wikipedia.org/wiki/Unsharp_masking

to counteract the blurring effects of the camera's 'anti-aliasing' filter:

http://en.wikipedia.org/wiki/Anti-aliasing

http://www.photographicworkflow.com/...liasing_Filter


The settings I used were very mild: Radius 2.00; Strength 100; Clipping 1

(Shooting RAW files is the answer but I CBA with all that myself - *yet*..!!
:-)


With a Canon macro lens (um - EF-S 60mm) this is
about the best I could come up with after about 10 minutes piddling about:

http://patchoulian.googlepages.com/photo

And I learnt the following: ignore the meter

Yep!

and use manual settings,

Yep!

use the flash,

Yep!

manual focus.

And yep!!

= A *perfect* shot in my book! :-)

Russ Andrews and Ben Duncan :-)
 

In article ,
Keith G wrote:
Can anyone explain what Kitty is on about? Why would you have a guy
'watching leads'?


You would have though he could have worked it out - without someone
watching the leads for overheating (and feeling them for when they have
cooled down between various attempts) it's all too easy to burn them
out especially when the guy on the starter can't hear anything over the
racket of a big diesel that's not playing ball...

Kitty, pet, all you're confirming is you used leads just not up to the
job. Did you disconnect all but one strand as you did with your speakers?

Back 'in the day' true *professional* thick, long, floppy jump leads for
HGVs and heavy plant cost a fortune - I just Googled and it seems it's
impossible to spend much over 200 quid for a pair of 'near miss' 50mm^2
these days...??

http://www0.uk.shopping.com/-jump+leads

This looks like a Russ Andrews site by the claims.

(Probably at least what they cost some 30 years ago - and some are as
little as 3 quid or so for a pair...???)

Yes Kitty. A jump lead is a jump lead. Sheeshe.

If you want to learn about vehicle battery cable ratings. try a site that
sells such things.

http://www.vehicle-wiring-products.e...tterycable.php

But for jump leads the length and just how good the connector is have to
be taken into consideration. Just like speakers...

--
*Virtual reality is its own reward *

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

Russ Andrews and Ben Duncan :-)
 

In article ,
Keith G wrote:

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

Can anyone explain what Kitty is on about? Why would you have a guy
'watching leads'?

The current draw when jump starting an HGV or coach is enough to
vaporise a standard set of jump leads. Even using a set of super heavy
duty it is advisable to have somebody watching them to make sure that
they are not overheating, if the insulation melts and the cables sag
and touch metal then Bang!


Bingo! (I wish I'd seen your post before I hit 'send' just now!! :-)

Even when the exercise is/was successful and went well it was often a
bugger to get the very hot leads off and out the way without a disaster
like starting a fire or losing part of a finger or thumb....

You've retired now? Thank gawd. Hope it's now left to professionals.

--
*Am I ambivalent? Well, yes and no.

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

Russ Andrews and Ben Duncan :-)
 

"Dave Plowman (News)" wrote in message
...
In article ,
David Looser wrote:
"Dave Plowman (News)" wrote in message
...
In article ,
Eiron wrote:
The photo looks like an inch of 0.2mm diameter wire from a 79 strand
2.5mm^2 cable. I think it would blow at less than 20 amps but the
voice coil would probably blow first.

0.2mm diameter is rated at 5 amps in open fuse terms.


And the chance of a 5A fuse in the speaker lead blowing under any
conceivable domestic listening situation is as close to zero as makes
very little difference.

It really depends on the speakers. amps and level you use.


Agreed. Take for example my experience of blowing a 5A standard blow fuse
with a 100 wpc amp driving a home speaker that was very similar to an AR3
woofer.

I was merely
trying to explain to Kitty that a short length of single strand wire might
well not make any audible difference under some circumstances. But might
well under others.

There's the well-known (at least to some of us) of IM due to a fuse in a
full-range system, mentioned in Greiner's classic JAES paper about speaker
cables, etc.


If a 5 amp fuse wouldn't ever blow I doubt few decent speakers could be
damaged through overdriving. But they can do and are.

Bingo!

Russ Andrews and Ben Duncan :-)
 

"Arny Krueger" wrote in message
...



Agreed. Take for example my experience of blowing a 5A standard blow fuse
with a 100 wpc amp driving a home speaker that was very similar to an AR3
woofer.


100W *sine wave* into 4 ohm is 5A rms. So even driving the amp to clipping
with a sine wave, and leaving it there, you won't blow a 5A fuse, With music
the rms current will be a lot lower even with the amp running into clipping
on thre peaks. So quite what abuse you were inflicting on the poor thing to
make it blow that fuse I don't know, but abuse it most certainly was. It
wouldn't have protected the speaker unless the speaker was hugely overated,
nor the amp come to that (semiconductors fuse far more quickly than fuses
do).

David.

Russ Andrews and Ben Duncan :-)
 

"Dave Plowman (News)" wrote in message
...
In article ,
Keith G wrote:
Can anyone explain what Kitty is on about? Why would you have a guy
'watching leads'?


You would have though he could have worked it out - without someone
watching the leads for overheating (and feeling them for when they have
cooled down between various attempts) it's all too easy to burn them
out especially when the guy on the starter can't hear anything over the
racket of a big diesel that's not playing ball...

Kitty, pet,


Gawd, he's going *gay* now....



all you're confirming is you used leads just not up to the
job. Did you disconnect all but one strand as you did with your speakers?

Back 'in the day' true *professional* thick, long, floppy jump leads for
HGVs and heavy plant cost a fortune - I just Googled and it seems it's
impossible to spend much over 200 quid for a pair of 'near miss' 50mm^2
these days...??

http://www0.uk.shopping.com/-jump+leads

This looks like a Russ Andrews site by the claims.

(Probably at least what they cost some 30 years ago - and some are as
little as 3 quid or so for a pair...???)

Yes Kitty. A jump lead is a jump lead. Sheeshe.

If you want to learn about vehicle battery cable ratings. try a site that
sells such things.

http://www.vehicle-wiring-products.e...tterycable.php

But for jump leads the length and just how good the connector is have to
be taken into consideration. Just like speakers...



The endless/meaningless/irrelevant blather from this arrogant **** who
thinks he knows more than the professionals did *decades* ago is no longer
worth looking at and/or commenting on - even *obliquely*....



--
*Virtual reality is its own reward *

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

Russ Andrews and Ben Duncan :-)
 

Dave Plowman (News) wrote..

Err, why would you use 'standard' jump leads to start something that takes
a great deal more current than a car? Unless you're Kitty, obviously.

Because you've stopped at Scratchwood services with a coach load of
half ****ed punters gasping for a pee, the bloody coach wont start,
that's all they've got in the shop, nobody in the HGV park has got any
it's one in the morning and yer desperate. A very helpful Dutch chap
dropped his trailer and gave us a tow start in the end.

[quoted text muted]
they are not overheating, if the insulation melts and the cables sag
and touch metal then Bang!

Then they're not 'super heavy duty' enough. Or does the cable twixt
battery and starter routinely melt on such vehicles?

Tell that to Boss Skinflint.

--
Ken
http://unsteadyken.110mb.com/

Russ Andrews and Ben Duncan :-)
 

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

Err, why would you use 'standard' jump leads to start something that
takes
a great deal more current than a car? Unless you're Kitty, obviously.

Because you've stopped at Scratchwood services with a coach load of
half ****ed punters gasping for a pee, the bloody coach wont start,
that's all they've got in the shop, nobody in the HGV park has got any
it's one in the morning and yer desperate. A very helpful Dutch chap
dropped his trailer and gave us a tow start in the end.

[quoted text muted]
they are not overheating, if the insulation melts and the cables sag
and touch metal then Bang!

Then they're not 'super heavy duty' enough. Or does the cable twixt
battery and starter routinely melt on such vehicles?

Tell that to Boss Skinflint.


Waste of time talking to Pucci about the *real world* Ken - he's spent most
his life mincing up and down Bull**** Boulevard with a jack plug in one hand
and a 13 amp fuse in the other looking for someone with a 'GSOH' and 'own
flat', from what I can see of it....

;-)

Russ Andrews and Ben Duncan :-)
 

In article ,
UnsteadyKen wrote:
Dave Plowman (News) wrote..

Err, why would you use 'standard' jump leads to start something that
takes a great deal more current than a car? Unless you're Kitty,
obviously.

Because you've stopped at Scratchwood services with a coach load of
half ****ed punters gasping for a pee, the bloody coach wont start,
that's all they've got in the shop, nobody in the HGV park has got any
it's one in the morning and yer desperate. A very helpful Dutch chap
dropped his trailer and gave us a tow start in the end.

And this proves what? Other than cables need to be up to the job?

[quoted text muted]
they are not overheating, if the insulation melts and the cables sag
and touch metal then Bang!

Then they're not 'super heavy duty' enough. Or does the cable twixt
battery and starter routinely melt on such vehicles?

Tell that to Boss Skinflint.

Not really an answer to the point.

--
*Why do the two "sanction"s (noun and verb) mean opposites?*

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