Relay contact rating

[Phil Allison]

"John Fields = TROLL "


** **** off - you stupid, autistic wanker.

 

[[email protected]]

I believe the correct term is crest factor, dynamic range is something
entirely different


-Lasse

 

[Phil Allison]

I believe the correct term is crest factor, dynamic range is something
entirely different

** Correct.

Dynamic range of music programme refers to the difference ( in dBs ) between
the loudest and softest passages in a piece of music.

Highly compressed pop music has a very narrow dynamic rage ( maybe only 3
dB ) and closely resembles band limited pink noise in most other respects.

The crest factor of pink noise is about 13 dB, unless there has been some
deliberate tampering to get the figure lower - eg heavily clipping the peaks
brings it down to 6 dB.


..... Phil

 

[josephkk]

I did not say it would not work. I said that life would be poor. Big
difference.

?-)

 

[Syd Rumpo]

Dynamic range of music programme refers to the difference ( in dBs ) between
the loudest and softest passages in a piece of music.

Highly compressed pop music has a very narrow dynamic rage ( maybe only 3
dB ) and closely resembles band limited pink noise in most other respects.


.... Phil

I remember this being demonstrated in the earley seventies at the BBC
using 'Telstar'by the Tornados. The PPM needle barely moved.

Cheers

 

[Charlie E.]

---
Sorry, Charlie.

If the arc is left on its own, with unbounded resources, it'll live
forever.
---

I didn't say that! ;-)

Actually, it probably will, because it doesn't have unbounded
resources. The wear of the contacts from the hot arc will take care
of it in a minute or two... ;-)

Charlie

 

[Phil Allison]

"Syd Rumpo"

I remember this being demonstrated in the earley seventies at the BBC
using 'Telstar'by the Tornados. The PPM needle barely moved.

** Sounds bloody awful by modern standards:

..... Phil

 

[Phil Allison]

"Charlie E."

I didn't say that! ;-)

Actually, it probably will, because it doesn't have unbounded
resources. The wear of the contacts from the hot arc will take care
of it in a minute or two... ;-)

** No one was talking about continuous arcs, as they only occur when the DC
rating of the relay is exceeded.

Fields is an incorrigible context shifter, mainly because the fool has NO
FUCKING IDEA what the context is at any given point.



..... Phil

 

[John Devereux]

---
You wrote:

"** The arc has to quench itself as the gap between contacts increases
so 2A and 24VDC are the max conditions where this happens reliably
over a large number of operations."

To which I replied:

"The arc cannot quench itself,"

You, having been unhorsed, retaliated with your usual Philth:

"** Of course it does - you pedantic, autistic twat."

Finally, I explained the reason why an arc cannot quench itself:

"If the arc is left on its own, with unbounded resources, it'll live
forever."

Clearly, then, the context was explicit and only a modicum of
intelligence should have been required to understand that events
EXTERNAL to the arc would determine its lifetime.

Mor on context brings to mind that earlier in the discussion, when we
were discussing the positive temperature coefficient of resistance of
the metals used in relay contacts, you defended your position that the
net effect was one of a negative tempco because the rogue films that
form on the contact surfaces exhibit negative tempcos, albeit without
recognizing that by and large the films are INSULATORS!

How fucking stupid was that???

John, you delight in starting stupid, pedantic, pointless arguments
about *abolutely nothing*.

 

[Phil Allison]

"John Fields"

---
You wrote:

"** The arc has to quench itself as the gap between contacts increases
so 2A and 24VDC are the max conditions where this happens reliably
over a large number of operations."

To which I replied:

"The arc cannot quench itself,"

** Of course it does - you pedantic, autistic twat.

An arc forms as soon as the contacts seperate, then self extinguishes as
they open further.

Finally, I explained the reason why an arc cannot quench itself:

"If the arc is left on its own, with unbounded resources, it'll live
forever."

** That is where you BLATANTLY shifted the context !!!!

You fucking twat.

Mor on context brings to mind that earlier in the discussion, when we
were discussing the positive temperature coefficient of resistance of
the metals used in relay contacts,

** No discussion of that fact occurred.

DO NOT RE -WRITE what happens usenet !!

you defended your position that the
net effect was one of a negative tempco because the rogue films that
form on the contact surfaces exhibit negative tempcos,

** Absolutely false re-writing of what was actually said.

Sulphide film exhibits a negative resistance characteristic that is very
strong.

FOAD fool.



.... Phil