Root cause insight into the common BMW blower motor resistor

[Scott Dorsey]

Cydrome Leader <presence@MUNGEpanix.com> wrote:

In sci.electronics.repair Scott Dorsey <kludge@panix.com> wrote:
Nothing wrong with linear motor control, it's just inefficient and
produces a lot of heat. I used to work in a place with a 1.2 MW DC
motor whose field coil voltage was controlled by a couple rooms full
of cast-iron resistors. The resistance array lasted nearly 80 years
before the whole facility was taken down.

I've got ask- what was this motor used for?

pumping station? mining equipment steel mill?

You could call it a sort of wind tunnel. Now obsolete, in great part due
to computer modelling making analysis tools like that less important, and
in great part due to computer modelling of the tools making it possible to
make less turbulent tunnels.
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."

 

[Michael A. Terrell]

jim beam wrote:

On 03/28/2013 05:20 AM, Scott Dorsey wrote:
Leif Neland <leif@neland.dk> wrote:
F�lgende er skrevet af Nate Nagel:
On 03/25/2013 01:58 PM, Bimmer Owner wrote:
On Mon, 25 Mar 2013 07:55:03 -0700, jim beam wrote:

that reduces the probability of it being rohs

What does ROHS mean?

Restriction of Hazardous Substances; that is, no lead (among other things.)

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

This does not count the hazardous issue of the soldering failing,
causing hazards to the users of the equipment :-(

That's why there are exemptions for the military and telecom industry,
where it's actually important that stuff work properly.

What I find ironic is that the shorter lifespan of consumer gear caused by
the RoHS manufacturing has actually increased the amount of electronics
going into landfills, making worse the problem that it was intended to reduce.
--scott


and yet, some say that there can be increased reliability.

http://en.wikipedia.org/wiki/ROHS#Reliability_concerns_unfounded

btw, if you want /real/ reliability, you wire wrap.

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

Sure you do. That's why it's mostly been abandoned. It was bulky,
and had horrible crosstalk unless you resorted to twisted pair
signaling. It is crap at higher frequencies. If you want to go back to
<5 MHz hardware, it's perfect.


--

Politicians should only get paid if the budget is balanced, and there is
enough left over to pay them.

Sometimes Friday is just the fifth Monday of the week.

 

[Michael A. Terrell]

Jamie wrote:

Cydrome Leader wrote:

In sci.electronics.repair Scott Dorsey <kludge@panix.com> wrote:

In article <kigfbd$nq7$2@dont-email.me>, jim beam <me@privacy.net> wrote:

On 03/21/2013 07:23 PM, Nate Nagel wrote:

*why* is it overheating?

because it's linear, retard. if you don't know what they means, fuck
off until you find out.

Nothing wrong with linear motor control, it's just inefficient and
produces a lot of heat. I used to work in a place with a 1.2 MW DC
motor whose field coil voltage was controlled by a couple rooms full
of cast-iron resistors. The resistance array lasted nearly 80 years
before the whole facility was taken down.


I've got ask- what was this motor used for?

pumping station? mining equipment steel mill?

Just to blow a lot of HOT AIR around, and it seems to work!

You're the resident hot air expert, Maynard Philbrick.


--

Politicians should only get paid if the budget is balanced, and there is
enough left over to pay them.

Sometimes Friday is just the fifth Monday of the week.

 

[Michael A. Terrell]

jim beam wrote:

On 03/27/2013 09:33 PM, Michael A. Terrell wrote:

jim beam wrote:

i don't know who you think you're talking to, but i have consistently
advocated /not/ deconstructing this unit.


Apparently I'm talking to a blowhard troll.


it's not worth it when cost
of replacement isn't that high or you can build an alternate controller
that will be more reliable.


Ass. The first step in designing a replacement is to understand what
it is supposed to do, and how the original performed that function.

no???? really? are you /sure/ about that??? or doesn't sarcasm work
for you???



and credentials don't work on usenet - they're completely uncheckable
and many are bogus. what matters is whether you can walk the talk.


You can't even crawl.

at least i can follow a thread without being a crotchety old fart.


Show us.

no, you're doing that.



as for having stuff in orbit, i don't have anything, but two of my best
friends do. the difference between them and you is that they're not
jaded and they're actually helpful.


Then tell them to reverse engineer it for you. Or can't they 'walk
the talk', either?

i don't /want/ to reverse engineer it any more than i want to repair
broken light bulbs. you were the one bragging about how easy it was. i
said it wasn't. and when it comes down to walking the talk, you won't.


Send me some defective modules, or quit trolling.

they're not my modules [again, you're not following the thread] and i
wouldn't replace them - i'd pwm the motor instead.

Without knowing how to interface it to the vehicle. What a lame ass
lying idiot. You demanded that I do the reverse engineering of said
modules, but you run in circles like chained animal. Hopefully you
don't change directions, before you choke yourself.

fact check required

You wouldn't know a fact, even if it walked up and puked on your
shoes.


--

Politicians should only get paid if the budget is balanced, and there is
enough left over to pay them.

Sometimes Friday is just the fifth Monday of the week.

 

[Michael A. Terrell]

jim beam wrote:

that's bogus. unless there's been a MAJOR screw-up, potting compounds
are carefully matched to the thermal and chemical application - they
serve to increase reliability, not degrade it.

How many deigns have you selected the proper potting compounds for?
What types of filler materials? How did you verify that no moisture
would be trapped inside the potting? Did you verify the temperature
coefficient of very component, the PC board material and the housing?
Test it for extended periods over the entire temperature, humidity and
barometric conditions that it can encounter in service. how about
vibration & impact testing? Or are you just blowing more smoke out your
ass.


--

Politicians should only get paid if the budget is balanced, and there is
enough left over to pay them.

Sometimes Friday is just the fifth Monday of the week.

 

[Michael A. Terrell]

Bimmer Owner wrote:

On Wed, 27 Mar 2013 08:35:09 -0700, jim beam wrote:

Bomarc has reverse engineered a lot of automotive modules:
http://www.bomarc.org/basement/viewtopic.php?f=1&t=6&sid=8ee707756ef37b24ff5aa633f1b4548a
that at least is vaguely useful

I wasn't sure how to cross reference using that list.
For example, it had only one BMW entry (camera module); and it did not have
GKR or Sitronic or Valeo brands; nor the keywords FSU, nor FSR; but it did
have things titled "blower motor controller), e.g.,

FORD F50F-19E624 heater blower motor controller ('97 L. CONNIE) 1

The lists are a partial offering of what they have done. I would ask
if they have done the specific board in the controller, or the estimated
costs to reverse engineer it. The website states a $20 per hour charge.

--

Politicians should only get paid if the budget is balanced, and there is
enough left over to pay them.

Sometimes Friday is just the fifth Monday of the week.

 

[Jamie]

Cydrome Leader wrote:

In sci.electronics.repair Scott Dorsey <kludge@panix.com> wrote:

In article <kigfbd$nq7$2@dont-email.me>, jim beam <me@privacy.net> wrote:

On 03/21/2013 07:23 PM, Nate Nagel wrote:

*why* is it overheating?

because it's linear, retard. if you don't know what they means, fuck
off until you find out.

Nothing wrong with linear motor control, it's just inefficient and
produces a lot of heat. I used to work in a place with a 1.2 MW DC
motor whose field coil voltage was controlled by a couple rooms full
of cast-iron resistors. The resistance array lasted nearly 80 years
before the whole facility was taken down.


I've got ask- what was this motor used for?

pumping station? mining equipment steel mill?

Just to blow a lot of HOT AIR around, and it seems to work!

Jamie

 

[jim beam]

On 03/28/2013 06:37 PM, Michael A. Terrell wrote:

jim beam wrote:

On 03/28/2013 05:20 AM, Scott Dorsey wrote:
Leif Neland <leif@neland.dk> wrote:
F�lgende er skrevet af Nate Nagel:
On 03/25/2013 01:58 PM, Bimmer Owner wrote:
On Mon, 25 Mar 2013 07:55:03 -0700, jim beam wrote:

that reduces the probability of it being rohs

What does ROHS mean?

Restriction of Hazardous Substances; that is, no lead (among other things.)

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

This does not count the hazardous issue of the soldering failing,
causing hazards to the users of the equipment :-(

That's why there are exemptions for the military and telecom industry,
where it's actually important that stuff work properly.

What I find ironic is that the shorter lifespan of consumer gear caused by
the RoHS manufacturing has actually increased the amount of electronics
going into landfills, making worse the problem that it was intended to reduce.
--scott


and yet, some say that there can be increased reliability.

http://en.wikipedia.org/wiki/ROHS#Reliability_concerns_unfounded

btw, if you want /real/ reliability, you wire wrap.

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


Sure you do. That's why it's mostly been abandoned. It was bulky,
and had horrible crosstalk unless you resorted to twisted pair
signaling. It is crap at higher frequencies. If you want to go back to
5 MHz hardware, it's perfect.

stop being so bent out of shape that you can't think straight old man -
i didn't say it was better at any of those things. i said it was more
reliable than solder. and it is.


--
fact check required

 

[jim beam]

On 03/28/2013 06:46 PM, Michael A. Terrell wrote:

jim beam wrote:

On 03/27/2013 09:33 PM, Michael A. Terrell wrote:

jim beam wrote:

i don't know who you think you're talking to, but i have consistently
advocated /not/ deconstructing this unit.


Apparently I'm talking to a blowhard troll.


it's not worth it when cost
of replacement isn't that high or you can build an alternate controller
that will be more reliable.


Ass. The first step in designing a replacement is to understand what
it is supposed to do, and how the original performed that function.

no???? really? are you /sure/ about that??? or doesn't sarcasm work
for you???



and credentials don't work on usenet - they're completely uncheckable
and many are bogus. what matters is whether you can walk the talk.


You can't even crawl.

at least i can follow a thread without being a crotchety old fart.


Show us.

no, you're doing that.



as for having stuff in orbit, i don't have anything, but two of my best
friends do. the difference between them and you is that they're not
jaded and they're actually helpful.


Then tell them to reverse engineer it for you. Or can't they 'walk
the talk', either?

i don't /want/ to reverse engineer it any more than i want to repair
broken light bulbs. you were the one bragging about how easy it was. i
said it wasn't. and when it comes down to walking the talk, you won't.


Send me some defective modules, or quit trolling.

they're not my modules [again, you're not following the thread] and i
wouldn't replace them - i'd pwm the motor instead.


Without knowing how to interface it to the vehicle.

??? if it were my vehicle, i'd be able to find it out now, wouldn't i!!!

What a lame ass
lying idiot.

whatever you say dude, but the fact is, i've done it before and i'd do
it again.

You demanded that I do the reverse engineering

i didn't demand any such thing, i pointed out that if you did, since you
were bragging about having done so much of it, you wouldn't be making
everyone have to listen to you piss and moan. but here you still are,
pissing and moaning since i guess it's so much easier, even for an
expert like yourself.

of said
modules, but you run in circles like chained animal. Hopefully you
don't change directions, before you choke yourself.


fact check required


You wouldn't know a fact, even if it walked up and puked on your
shoes.

--
fact check required

 

[jim beam]

On 03/28/2013 06:51 PM, Michael A. Terrell wrote:

jim beam wrote:

that's bogus. unless there's been a MAJOR screw-up, potting compounds
are carefully matched to the thermal and chemical application - they
serve to increase reliability, not degrade it.


How many deigns have you selected the proper potting compounds for?
What types of filler materials? How did you verify that no moisture
would be trapped inside the potting? Did you verify the temperature
coefficient of very component, the PC board material and the housing?
Test it for extended periods over the entire temperature, humidity and
barometric conditions that it can encounter in service. how about
vibration & impact testing? Or are you just blowing more smoke out your
ass.

wtf is eating your ass tonight? you're right that all those factors are
relevant. that's why i said potting compounds are "carefully matched".

as to moisture, you're attacking a straw man. i specifically didn't
list every possible application detail because it's common knowledge to
anyone doing that work. nobody specifies that any more than mechanical
drawings specify conventional right-hand threading on fasteners. /all/
fasteners are right hand threaded UNLESS left hand is specifically detailed.


--
fact check required

 

[Michael A. Terrell]

jim beam wrote:

stop being so bent out of shape that you can't think straight old man -
i didn't say it was better at any of those things. i said it was more
reliable than solder. and it is.

Yawn..............................................................


--

Politicians should only get paid if the budget is balanced, and there is
enough left over to pay them.

Sometimes Friday is just the fifth Monday of the week.

 

[Michael A. Terrell]

jim beam wrote:

On 03/28/2013 06:46 PM, Michael A. Terrell wrote:

jim beam wrote:

On 03/27/2013 09:33 PM, Michael A. Terrell wrote:

jim beam wrote:

i don't know who you think you're talking to, but i have consistently
advocated /not/ deconstructing this unit.


Apparently I'm talking to a blowhard troll.


it's not worth it when cost
of replacement isn't that high or you can build an alternate controller
that will be more reliable.


Ass. The first step in designing a replacement is to understand what
it is supposed to do, and how the original performed that function.

no???? really? are you /sure/ about that??? or doesn't sarcasm work
for you???



and credentials don't work on usenet - they're completely uncheckable
and many are bogus. what matters is whether you can walk the talk.


You can't even crawl.

at least i can follow a thread without being a crotchety old fart.


Show us.

no, you're doing that.



as for having stuff in orbit, i don't have anything, but two of my best
friends do. the difference between them and you is that they're not
jaded and they're actually helpful.


Then tell them to reverse engineer it for you. Or can't they 'walk
the talk', either?

i don't /want/ to reverse engineer it any more than i want to repair
broken light bulbs. you were the one bragging about how easy it was. i
said it wasn't. and when it comes down to walking the talk, you won't.


Send me some defective modules, or quit trolling.

they're not my modules [again, you're not following the thread] and i
wouldn't replace them - i'd pwm the motor instead.


Without knowing how to interface it to the vehicle.

??? if it were my vehicle, i'd be able to find it out now, wouldn't i!!!

What a lame ass
lying idiot.

whatever you say dude, but the fact is, i've done it before and i'd do
it again.

You demanded that I do the reverse engineering

i didn't demand any such thing, i pointed out that if you did, since you
were bragging about having done so much of it, you wouldn't be making
everyone have to listen to you piss and moan. but here you still are,
pissing and moaning since i guess it's so much easier, even for an
expert like yourself.

Yawn..............................................................


--

Politicians should only get paid if the budget is balanced, and there is
enough left over to pay them.

Sometimes Friday is just the fifth Monday of the week.

 

[Michael A. Terrell]

jim beam wrote:

On 03/28/2013 06:51 PM, Michael A. Terrell wrote:

jim beam wrote:

that's bogus. unless there's been a MAJOR screw-up, potting compounds
are carefully matched to the thermal and chemical application - they
serve to increase reliability, not degrade it.


How many deigns have you selected the proper potting compounds for?
What types of filler materials? How did you verify that no moisture
would be trapped inside the potting? Did you verify the temperature
coefficient of very component, the PC board material and the housing?
Test it for extended periods over the entire temperature, humidity and
barometric conditions that it can encounter in service. how about
vibration & impact testing? Or are you just blowing more smoke out your
ass.

wtf is eating your ass tonight? you're right that all those factors are
relevant. that's why i said potting compounds are "carefully matched".

as to moisture, you're attacking a straw man. i specifically didn't
list every possible application detail because it's common knowledge to
anyone doing that work. nobody specifies that any more than mechanical
drawings specify conventional right-hand threading on fasteners. /all/
fasteners are right hand threaded UNLESS left hand is specifically detailed.

Yawn..............................................................

--

Politicians should only get paid if the budget is balanced, and there is
enough left over to pay them.

Sometimes Friday is just the fifth Monday of the week.

 

[AMuzi]

On 3/29/2013 12:18 PM, Cydrome Leader wrote:

In sci.electronics.repair Scott Dorsey <kludge@panix.com> wrote:
Cydrome Leader <presence@MUNGEpanix.com> wrote:
In sci.electronics.repair Scott Dorsey <kludge@panix.com> wrote:
Nothing wrong with linear motor control, it's just inefficient and
produces a lot of heat. I used to work in a place with a 1.2 MW DC
motor whose field coil voltage was controlled by a couple rooms full
of cast-iron resistors. The resistance array lasted nearly 80 years
before the whole facility was taken down.

I've got ask- what was this motor used for?

pumping station? mining equipment steel mill?

You could call it a sort of wind tunnel. Now obsolete, in great part due
to computer modelling making analysis tools like that less important, and
in great part due to computer modelling of the tools making it possible to
make less turbulent tunnels.
--scott

so there was an 80 year old giant windtunnel somewhere?

You're joking, right?

1901:
http://airandspace.si.edu/wrightbrothers/fly/1901/wind.cfm

very modern 1935:
http://www.youtube.com/watch?v=5gqAyEwCmcA


--
Andrew Muzi
<www.yellowjersey.org/>
Open every day since 1 April, 1971

 

[Nate Nagel]

On 03/29/2013 01:18 PM, Cydrome Leader wrote:

In sci.electronics.repair Scott Dorsey <kludge@panix.com> wrote:
Cydrome Leader <presence@MUNGEpanix.com> wrote:
In sci.electronics.repair Scott Dorsey <kludge@panix.com> wrote:
Nothing wrong with linear motor control, it's just inefficient and
produces a lot of heat. I used to work in a place with a 1.2 MW DC
motor whose field coil voltage was controlled by a couple rooms full
of cast-iron resistors. The resistance array lasted nearly 80 years
before the whole facility was taken down.

I've got ask- what was this motor used for?

pumping station? mining equipment steel mill?

You could call it a sort of wind tunnel. Now obsolete, in great part due
to computer modelling making analysis tools like that less important, and
in great part due to computer modelling of the tools making it possible to
make less turbulent tunnels.
--scott

so there was an 80 year old giant windtunnel somewhere?

well, 80 years ago would be 1933; definitely into the era of commercial
flight, so it's entirely possible. Hell, the Germans might have been
working on jet engines by that point, or at least thinking about them.

nate

--
replace "roosters" with "cox" to reply.
http://members.cox.net/njnagel

 

[Cydrome Leader]

In sci.electronics.repair Scott Dorsey <kludge@panix.com> wrote:

Cydrome Leader <presence@MUNGEpanix.com> wrote:
In sci.electronics.repair Scott Dorsey <kludge@panix.com> wrote:
Nothing wrong with linear motor control, it's just inefficient and
produces a lot of heat. I used to work in a place with a 1.2 MW DC
motor whose field coil voltage was controlled by a couple rooms full
of cast-iron resistors. The resistance array lasted nearly 80 years
before the whole facility was taken down.

I've got ask- what was this motor used for?

pumping station? mining equipment steel mill?

You could call it a sort of wind tunnel. Now obsolete, in great part due
to computer modelling making analysis tools like that less important, and
in great part due to computer modelling of the tools making it possible to
make less turbulent tunnels.
--scott

so there was an 80 year old giant windtunnel somewhere?

 

[Jamie]

jim beam wrote:

On 03/28/2013 06:51 PM, Michael A. Terrell wrote:


jim beam wrote:


that's bogus. unless there's been a MAJOR screw-up, potting compounds
are carefully matched to the thermal and chemical application - they
serve to increase reliability, not degrade it.



How many deigns have you selected the proper potting compounds for?
What types of filler materials? How did you verify that no moisture
would be trapped inside the potting? Did you verify the temperature
coefficient of very component, the PC board material and the housing?
Test it for extended periods over the entire temperature, humidity and
barometric conditions that it can encounter in service. how about
vibration & impact testing? Or are you just blowing more smoke out your
ass.


wtf is eating your ass tonight? you're right that all those factors are
relevant. that's why i said potting compounds are "carefully matched".

as to moisture, you're attacking a straw man. i specifically didn't
list every possible application detail because it's common knowledge to
anyone doing that work. nobody specifies that any more than mechanical
drawings specify conventional right-hand threading on fasteners. /all/
fasteners are right hand threaded UNLESS left hand is specifically
detailed.

Let me offer you some good advice, put him on your black list so it
won't eat you up. I only see him in replies now, like yours here because
I have block him out of my reader.

He's nothing but an old bickering dried up prone. In his younger
years he most likely good off on little kids learning the field and made
him
feel like he was something else when he offered any knowledge that he
thought was useful to them. These days, the little kids have grown
up and most likely found out that half the information he fed them was
bogus!

Don't worry about what he has to say, he's one of those that wants
every one like you, to kiss is feet and say how much of a god he is.

It should be obviously that will never happen from this end

Jamie

 

[Michael A. Terrell]

Jamie wrote:

jim beam wrote:

On 03/28/2013 06:51 PM, Michael A. Terrell wrote:


jim beam wrote:


that's bogus. unless there's been a MAJOR screw-up, potting compounds
are carefully matched to the thermal and chemical application - they
serve to increase reliability, not degrade it.



How many deigns have you selected the proper potting compounds for?
What types of filler materials? How did you verify that no moisture
would be trapped inside the potting? Did you verify the temperature
coefficient of very component, the PC board material and the housing?
Test it for extended periods over the entire temperature, humidity and
barometric conditions that it can encounter in service. how about
vibration & impact testing? Or are you just blowing more smoke out your
ass.


wtf is eating your ass tonight? you're right that all those factors are
relevant. that's why i said potting compounds are "carefully matched".

as to moisture, you're attacking a straw man. i specifically didn't
list every possible application detail because it's common knowledge to
anyone doing that work. nobody specifies that any more than mechanical
drawings specify conventional right-hand threading on fasteners. /all/
fasteners are right hand threaded UNLESS left hand is specifically
detailed.



Let me offer you some good advice, put him on your black list so it
won't eat you up. I only see him in replies now, like yours here because
I have block him out of my reader.

He's nothing but an old bickering dried up prone. In his younger
years he most likely good off on little kids learning the field and made
him
feel like he was something else when he offered any knowledge that he
thought was useful to them. These days, the little kids have grown
up and most likely found out that half the information he fed them was
bogus!

Keep up the slander Maynard. I taught first year high school
electronics while I was still a Junior in that school. After that, I
trained new techs to use what they learned in school on the repair
benchg so they could earn a living. I was still doing this at
Microdyne, till the closed the local telemetry 'engineer to order'
facility.

The rest of my work history is online, along with my military service
with AFRTSwhich is availible to anyone with the DOD records database.
Maynard refuses to tell anyone where he works. He just damns everyone
else.

Don't worry about what he has to say, he's one of those that wants
every one like you, to kiss is feet and say how much of a god he is.

It should be obviously that will never happen from this end

The irony! I was 'black list' by an illiterate troll. All I can do
is laugh at the nonsense writing 'style' of someone who consistently
makes a fool of himself on news:sci.electronics.design He thinks an
'Electret' microphone is a 'crystal' microphone. His real name is
Maynard Philbrick. A typical appliance operator 'ham' with the call of
KA1LPA. look at his website to see what a sick individual he is.
http://webpages.charter.net/jamie_5/ if you have the stomach for
childish dirvel.


--

Politicians should only get paid if the budget is balanced, and there is
enough left over to pay them.

Sometimes Friday is just the fifth Monday of the week.

 

[jim beam]

On 03/29/2013 10:22 PM, Michael A. Terrell wrote:

Jamie wrote:

jim beam wrote:

On 03/28/2013 06:51 PM, Michael A. Terrell wrote:


jim beam wrote:


that's bogus. unless there's been a MAJOR screw-up, potting compounds
are carefully matched to the thermal and chemical application - they
serve to increase reliability, not degrade it.



How many deigns have you selected the proper potting compounds for?
What types of filler materials? How did you verify that no moisture
would be trapped inside the potting? Did you verify the temperature
coefficient of very component, the PC board material and the housing?
Test it for extended periods over the entire temperature, humidity and
barometric conditions that it can encounter in service. how about
vibration & impact testing? Or are you just blowing more smoke out your
ass.


wtf is eating your ass tonight? you're right that all those factors are
relevant. that's why i said potting compounds are "carefully matched".

as to moisture, you're attacking a straw man. i specifically didn't
list every possible application detail because it's common knowledge to
anyone doing that work. nobody specifies that any more than mechanical
drawings specify conventional right-hand threading on fasteners. /all/
fasteners are right hand threaded UNLESS left hand is specifically
detailed.



Let me offer you some good advice, put him on your black list so it
won't eat you up. I only see him in replies now, like yours here because
I have block him out of my reader.

He's nothing but an old bickering dried up prone. In his younger
years he most likely good off on little kids learning the field and made
him
feel like he was something else when he offered any knowledge that he
thought was useful to them. These days, the little kids have grown
up and most likely found out that half the information he fed them was
bogus!


Keep up the slander Maynard. I taught first year high school
electronics while I was still a Junior in that school. After that, I
trained new techs to use what they learned in school on the repair
benchg so they could earn a living. I was still doing this at
Microdyne, till the closed the local telemetry 'engineer to order'
facility.

The rest of my work history is online, along with my military service
with AFRTSwhich is availible to anyone with the DOD records database.
Maynard refuses to tell anyone where he works. He just damns everyone
else.


Don't worry about what he has to say, he's one of those that wants
every one like you, to kiss is feet and say how much of a god he is.

It should be obviously that will never happen from this end


The irony! I was 'black list' by an illiterate troll. All I can do
is laugh at the nonsense writing 'style' of someone who consistently
makes a fool of himself on news:sci.electronics.design He thinks an
'Electret' microphone is a 'crystal' microphone. His real name is
Maynard Philbrick. A typical appliance operator 'ham' with the call of
KA1LPA. look at his website to see what a sick individual he is.
http://webpages.charter.net/jamie_5/ if you have the stomach for
childish dirvel.

it's drivel, not "dirvel".

as to your apparent feud, i don't know either you or jamie - i only read
r.a.t and neither of you are regular contributors. i will say though
that given my interactions so far, he's fine. you're not. and fyi,
publishing someone else's personal details on usenet is seriously huge
asshole behavior. you can be a retard and publish your own personals
all you want, but someone else's is /WAY/ out of line.


--
fact check required

 

[Cydrome Leader]

In sci.electronics.repair AMuzi <am@yellowjersey.org> wrote:

On 3/29/2013 12:18 PM, Cydrome Leader wrote:
In sci.electronics.repair Scott Dorsey <kludge@panix.com> wrote:
Cydrome Leader <presence@MUNGEpanix.com> wrote:
In sci.electronics.repair Scott Dorsey <kludge@panix.com> wrote:
Nothing wrong with linear motor control, it's just inefficient and
produces a lot of heat. I used to work in a place with a 1.2 MW DC
motor whose field coil voltage was controlled by a couple rooms full
of cast-iron resistors. The resistance array lasted nearly 80 years
before the whole facility was taken down.

I've got ask- what was this motor used for?

pumping station? mining equipment steel mill?

You could call it a sort of wind tunnel. Now obsolete, in great part due
to computer modelling making analysis tools like that less important, and
in great part due to computer modelling of the tools making it possible to
make less turbulent tunnels.
--scott

so there was an 80 year old giant windtunnel somewhere?

You're joking, right?

1901:
http://airandspace.si.edu/wrightbrothers/fly/1901/wind.cfm

very modern 1935:
http://www.youtube.com/watch?v=5gqAyEwCmcA

even elevators lasting 80 years is pushing it for keeping old stuff
around.