Re: EOL's
- From: Robert L Bass <sales@xxxxxxxxxxxxxxxxxxxxx>
- Date: Sun, 19 Feb 2006 18:42:19 -0300
I don't mean to belittle you as you are obviously trying to do to me,
No, Al. I tried to explain politely why you are wrong. If you
consider that belittling, you've got a problem.
but you really show how little practical field or
bench repair experience you have when you say
that high temperatures, combined with high
humidity cannot affect resistance in a carbon
resistor.
Speaking of journalistic integrity (or lack thereof), that is
*not* what I said. I said that the temperature required to cause
such a significant change in the resistor's value would be enough
to ignite the house. I did not say that high temps and humidity
can't affect carbon film resistors. I did however point out that
the resistors are sealed make humidity a non-issue.
Although it may not be common for a field resistor
to change value based on high ambient heat and
high levels of humidity, it can and does happen in
the real world...
Not with the temperatures in a homes environment (unless you plan
to install the thing in the oven).
To tell anyone that this is not so is doing them a
disservice...
Actually, when you offered advice as to the cause without
understanding you did a disservice to everyone who reads this
newsgroup.
Also, perhaps this man's resistor suffered an induced
high current due to a nearby lighting strike, in which
case the excessive heat caused by the high current
could have super heated the carbon, causing its
properties to change.
Uh-huh. If that had happened there would have been much more
damage to the system than a changed resistor value. A lightning
hit that created that much heat would have blown the sensor to
Waco. Have you ever noticed how fragile magnetic contacts are
compared to a resistor?
What I've told him I stand behind from both my electronic
training and my experience in the field...
--- snip resume ---
Stand wherever you like. You're still wrong about resistor
tolerance. It does not mean what you said and switching to a
closer tolerance resistor would not protect against a recurrence.
I stand behind my statement 100% unless someone
else who has some real engineering knowledge can
step up and refer me to an on-line source of information
that says, as you have, that temperature and humidity,
combined with time, cannot change the value of a
carbon resistor.
That is not what I said. Stop trying to twist my statement into
something you can challenge. It makes you appear olsonic. I
merely corrected your error when you insisted that the resistor
tolerance indicates a propensity of the resistor to change over
time. It means nothing of the sort.
I also explained another fact of which you seem blissfully
unaware. Heat and current sufficient to significantly alter the
resistor's value would be enough to start a fire. The presence
of that much heat would be very apparent -- melted insulation,
vaporized of frozen magnetic contacts, etc.
That's my final word until that day comes.
That day was yesterday. Feel free to continue waiting for its
arrival.
--
Regards,
Robert L Bass
Bass Burglar Alarms
The Online DIY Store
http://www.BassBurglarAlarms.com
--
Never underestimate the power of very stupid people in large
groups.
.
- References:
- Prev by Date: Re: EOL's
- Next by Date: Re: FS: C&K SpreadNet Wireless
- Previous by thread: Re: EOL's
- Next by thread: Re: EOL's
- Index(es):
Relevant Pages
|
