[modeleng] Re: it's a bit quiet here...

Andy thanks point taking just posted as was sent to me
cheers
kenny

----- Original Message ----- 
From: "Andrew Houston" <andrew@xxxxxxxxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Wednesday, March 29, 2006 6:59 PM
Subject: [modeleng] Re: it's a bit quiet here...


> Kenny
>
> Thinks ! Perhaps you can buy them at the dummy rivet head suppliers ?
>
> Seriously.  Every time I see terms like "real butter", I think, "what's
> un-real butter ?" or in other words, butter is butter - so the word "real"
> is not necessary.  Ditto "real leather"
>
> So is "a dummy rivet head" a dummy head for a real rivet or a dummy rivet
> with a real head.  Strange how the mind wanders when there's not too much
> traffic on the DL.
>
> On A. N. Other subject, someone on this DL - or maybe another one (see
> previous comment about "mind wandering") - asked why their lathe speed
> controls don't work at low temperatures.  Simple answer is that they 
> weren't
> designed correctly for the range of temperatures in which they are 
> operated
> by the typical buyers.  Someone got the Customer requirements wrong !
>
> Some components, for example electrolytic capacitors and batteries, suffer
> considerable reduction in their "capacity" as temperature falls.  Some
> components have an increase in value as the temperature falls.  In
> consequence, it's not that the circuit "actually fails", it's just that
> parts of it may not produce a high enough signal to operate the next part
> so, in effect the circuit stops operating correctly at a particular
> temperature.
>
> Try looking at the specification and you may find it has an operating
> temperature range - eg minus 10 to plus 40 degrees C.  That would be about
> right for a model engineer since he wouldn't want to be in a workshop 
> colder
> than minus 10 or hotter than plus 40.  I would suspect that the actual 
> spec
> is plus 10 to ????
>
> Good equipment - like what I've designed in the past - usually quotes
> storage temperature & humidity range and operating temp & humidity range.
> Sometimes the latter is extended by stating that a particular function
> cannot be used - or other factors such as "the equipment will operate
> between minus 10 and minus 20 degrees C, but battery life will be halved"
>
> More technical explanations can be provided on receipt of a good copy of 
> the
> circuit diagram and the usual consultancy fee - cash, no personal cheques.
>
> Keep steaming folks
> Andy
>
> -----Original Message-----
> From: modeleng-bounce@xxxxxxxxxxxxx [mailto:modeleng-bounce@xxxxxxxxxxxxx]
> On Behalf Of kenny
> Sent: 29 March 2006 17:33
> To: modeleng@xxxxxxxxxxxxx
> Subject: [modeleng] Re: it's a bit quiet here...
>
> Hello a friend of mines is looking for dummy copper rivet heads for gluing
> to the water tanks of his 3 1/2 gauge loco for detail anybody know where 
> to
> buy them
> Kenny
> Skye
>
>
>
> ----- Original Message ----- 
> From: "John Buckley" <jbuckley@xxxxxxxxxxxxxxxxx>
> To: <modeleng@xxxxxxxxxxxxx>
> Sent: Wednesday, March 29, 2006 5:18 PM
> Subject: [modeleng] it's a bit quiet here...
>
>
>> Cutting gear blanks for an IC engine that is "under" way. Also some
>> teachings at tafe (I need the money).
>> John
>>
>>
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>
>
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