Digest for sci.electronics.repair@googlegroups.com - 11 updates in 4 topics

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"Michael A. Terrell" <mike.terrell@earthlink.net>: Oct 31 07:34PM -0400


> Less interruption? How so? When we were in high school (long before)
> there were no "bathroom passes". Classes were 50 minutes with 10
> minutes between. Young adults were expected to be potty trained.
 
By letting them get up and use it quickly without interrupting the
class to ask for the pass and the time it took to return it. Some people
have medical problems, and the need arises without much warning.
 
 
We had five minutes between classes. Then the principal retired. His
replacement cut it to three minutes between classes and turned off the
bells even though the clock system needed a lot of work. It turned into
a real mess when hundreds of kids were sent to the principal's office
for being tardy for each class. The teachers used whatever their watch
said, and no two were the same.
 
 
--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.
"Michael A. Terrell" <mike.terrell@earthlink.net>: Oct 31 08:38PM -0400


> Your principal and the entire faculty, in fact, were morons. Maybe
> they were just ahead of their time. It also must have been a very
> small high school.
 
1400
--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.
josephkk <joseph_barrett@sbcglobal.net>: Nov 03 05:37PM -0800

On Thu, 30 Oct 2014 17:17:07 -0400, "Mike Marlow"
>you the best - deal with the problems you are creating.
 
>> One teacher uses a bathroom plunger, as his bathroom pass.
 
>Brilliant! Shear stupidity - so why shouldn't everyone else follow suit?
 
Mikw Marlow:
If you are so wise let's hear your solutions to each case where you
kvetched. There are several, let's hear what you would have the
teacher/school do.
 
?-/
 
josephkk <joseph_barrett@sbcglobal.net>: Nov 03 05:47PM -0800

On Fri, 31 Oct 2014 08:52:10 -0400, Stormin Mormon <cayoung61@hotmail.com>
wrote:
 
>self esteem, and fragile feelings, instead of old
>fashioned tried and true.
 
>-
 
It largely is/was since the 1970s. I saw it, i was there. About mid 2001
decade the parental rebellion about no schools for performance started to
get results. So far only tokenism such as charter schools. Real reform
won't happen until the teachers unions are broken. Which requires a
society of responsibility for your actions. Not something to hold your
breath for.
 
?-)
"Mike Marlow" <mmarlowREMOVE@windstream.net>: Nov 03 11:15PM -0500

josephkk wrote:
 
> If you are so wise let's hear your solutions to each case where you
> kvetched. There are several, let's hear what you would have the
> teacher/school do.
 
No need. If one cannot come up with anything more appropriate than a
bathroom plunger for a hall pass, then the same person would not understand
any higher level of thinking. Just let them go on with their foolishness.
 
BTW - learn how to trim a post instead of re-posting a ton of lines with
your own comment inserted within the first few lines.
 
--
 
-Mike-
mmarlowREMOVE@windstream.net
josephkk <joseph_barrett@sbcglobal.net>: Nov 03 08:11PM -0800

josephkk <joseph_barrett@sbcglobal.net>: Nov 03 08:19PM -0800


>The NEC did not require them to.
 
>Water pipes (10 or more ft of metal in contact with the earth) must
>still be used as one of the power system earthing electrodes.
 
I don't know what version of NFPA 70 (NEC) you are talking about; but
recent editions of the NEC requires a grounding electrode (rod) with at
least 10 feet in direct earth contact; plus bonding to water pipe and gas
pipe when metallic. Also bonding to the structural steel if there is
significant steel above ground. Enforcing article 250 et seq. has been
part of my job for the past 8 years.
 
Phil Allison <pallison49@gmail.com>: Nov 03 03:56PM -0800

Leif Neland
 
 
> What was your bill?
> What is the cost of a new one?
 
 
** Been in the repair game long enough not to make that sort of mistake.
 
My bill is well below the price one pays on eBay for similar examples.
 
 
> Was the customer ensured?
 
** Not my problem.
 
> What warranty do you offer on the repair?
 
 
** Same as ever - that my workmanship was without fault.
 
No new parts were used.
 
 
> Will it ruin the show if this speaker dies during a performance?
 
 
** That is always a risk, any time you rely on a piece of gear.
 

> In short, while the repair was heroic, I would have turned down the
> customer, or at least informed of the risk of future failure.
 
 
** A lot of tech may have done that - cos they have simply not my experience with recovering water soaked audio gear.
 
I have seen and restored far worse.
 
 
 
 
.... Phil
Phil Allison <pallison49@gmail.com>: Nov 03 03:59PM -0800

N_Cook wrote:
 
 
 
> Seawater or tap/rain water?
 
** Clean water by the look of it - Sydney had a big storm a couple of weeks back.
 
 
> Powered up or on standby when flooded?
 
** In storage, far as I know.
 
The owner was smart enough NOT to try powering it up wet.
 
 
.... Phil
sonnichjensen@gmail.com: Nov 03 12:55PM -0800

Hi all
 
I have got this small monitor (and TV which I dont use). It only shows a green picture.
Sometimes, it get blueish but I cannot keep that or measure on that. But that and that all 3 filaments work makes me think that the CRT is ok
The picture is sharp and nice, but only green.
 
It is build on TDA4505 and TDA3565 (pal and colour decoder).
 
The TDA3565 has its frequencies (but the 8.8Mhz seems a bit higher), and I can adjust pin 5 (color) 1.5-2.2V which is clearly visible on the RGB outputs. A wild guess is that it is somewhat working.
 
From the TDA3565 3 transistors are driveing the CRT. Both TDA3565 and transistors are replaced, but I still have this problem. All eletrolytes are replaced.
 
Since I find it hard to believe that the CRT is broken, what could it possible be?
The set is so simple that I cannot see what it can be.
 
WBR
Sonnich
jurb6006@gmail.com: Nov 03 01:17PM -0800

You mean missing red ?
 
Cathode voltages. If the red cathode voltage is higher, it is in the circuitry. If it is lower it is the CRT.
 
It is less likely for the color decoder to cause the loss of a color than something in the video output circuitry, usually mounted on a board right on the CRT socket. That is the main place to check. If you do not have information on it, you can see there ar three identical things going to three of the pins. Those will be the cathodes. You should see eacj go through a resistor or sometning to a pin on an IC or transistor. If there are three ICs you can swap them to ind the fault, but alot of them use one IC for all colors. Or it could have three transistors. If you can get a good picture of the CRT board (where the socket is), I can probably sort out what's what if you don't do well at reverse engineering.
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