Toshiba TV29C90 problem; Image fades to black...

Jim Yanik <jyanik@abuse.gov> wrote:
Cydrome Leader <presence@MUNGEpanix.com> wrote in
news:j33cut$sm2$1@reader1.panix.com:

Jim Yanik <jyanik@abuse.gov> wrote:
Cydrome Leader <presence@MUNGEpanix.com> wrote in
news:j30scc$sj$1@reader1.panix.com:

sweden is good at carboard furniture and
not letting go of disco, not clever engineering.


Yet Sweden has fielded the SAAB/Scania Gripen,Viggen,and Draken jet
fighters,all excellent engineering projects,very advanced for their
eras.

the egyptians were good at stuff a long time ago too.


JAS 39 Gripen is modern.
Good enough that other nations are buying them,IIRC.
yeah, good enough for heavy hitters like the south african and hungarian air force.

ISTR that the US is buying some Swedish BOFORS weapons,too.
Those would be nice to play with.
 
Cydrome Leader <presence@MUNGEpanix.com> wrote in
news:j361na$1m9$1@reader1.panix.com:

Jim Yanik <jyanik@abuse.gov> wrote:
Cydrome Leader <presence@MUNGEpanix.com> wrote in
news:j33cut$sm2$1@reader1.panix.com:

Jim Yanik <jyanik@abuse.gov> wrote:
Cydrome Leader <presence@MUNGEpanix.com> wrote in
news:j30scc$sj$1@reader1.panix.com:

sweden is good at carboard furniture and
not letting go of disco, not clever engineering.


Yet Sweden has fielded the SAAB/Scania Gripen,Viggen,and Draken jet
fighters,all excellent engineering projects,very advanced for their
eras.

the egyptians were good at stuff a long time ago too.


JAS 39 Gripen is modern.
Good enough that other nations are buying them,IIRC.

yeah, good enough for heavy hitters like the south african and
hungarian air force.
yes,considering they are poor nations and still could have bought US or
Russian aircraft.
Gripen may fit their needs better than US/Russian AC.
It's designed to be field-maintainable,and have an ability use public roads
for runways.(after [or before] the usual bases are bombed out.)
OTOH,most other modern fighters must be maintained at and operated from
military bases.

Gripen is still a modern,high performance fighter.
ISTR that the US is buying some Swedish BOFORS weapons,too.

Those would be nice to play with.



--
Jim Yanik
jyanik
at
localnet
dot com
 
Jim Yanik <jyanik@abuse.gov> wrote:
Cydrome Leader <presence@MUNGEpanix.com> wrote in
news:j361na$1m9$1@reader1.panix.com:

Jim Yanik <jyanik@abuse.gov> wrote:
Cydrome Leader <presence@MUNGEpanix.com> wrote in
news:j33cut$sm2$1@reader1.panix.com:

Jim Yanik <jyanik@abuse.gov> wrote:
Cydrome Leader <presence@MUNGEpanix.com> wrote in
news:j30scc$sj$1@reader1.panix.com:

sweden is good at carboard furniture and
not letting go of disco, not clever engineering.


Yet Sweden has fielded the SAAB/Scania Gripen,Viggen,and Draken jet
fighters,all excellent engineering projects,very advanced for their
eras.

the egyptians were good at stuff a long time ago too.


JAS 39 Gripen is modern.
Good enough that other nations are buying them,IIRC.

yeah, good enough for heavy hitters like the south african and
hungarian air force.

yes,considering they are poor nations and still could have bought US or
Russian aircraft.
You really think the auth african air force can afford US made airplanes?
I'll give them credit when due though, nobody wants some russian shit
either. All russian planes are good for are crashing at airshows.

Gripen may fit their needs better than US/Russian AC.
It's designed to be field-maintainable,and have an ability use public roads
for runways.(after [or before] the usual bases are bombed out.)
Maybe they should just get some cessnas, or some retired news helicopters.
They'd be more fitting for such primitive places.

OTOH,most other modern fighters must be maintained at and operated from
military bases.
Did you just copy and paste this description of this plane from a
craiglist or yahoo auctions site, or wherever you'd buy a used kit
airplane?

Gripen is still a modern,high performance fighter.
sure it is.
 
Cydrome Leader <presence@MUNGEpanix.com> wrote in
news:j36hdc$ain$1@reader1.panix.com:

Jim Yanik <jyanik@abuse.gov> wrote:
Cydrome Leader <presence@MUNGEpanix.com> wrote in
news:j361na$1m9$1@reader1.panix.com:

Jim Yanik <jyanik@abuse.gov> wrote:
Cydrome Leader <presence@MUNGEpanix.com> wrote in
news:j33cut$sm2$1@reader1.panix.com:

Jim Yanik <jyanik@abuse.gov> wrote:
Cydrome Leader <presence@MUNGEpanix.com> wrote in
news:j30scc$sj$1@reader1.panix.com:

sweden is good at carboard furniture and
not letting go of disco, not clever engineering.


Yet Sweden has fielded the SAAB/Scania Gripen,Viggen,and Draken
jet fighters,all excellent engineering projects,very advanced for
their eras.

the egyptians were good at stuff a long time ago too.


JAS 39 Gripen is modern.
Good enough that other nations are buying them,IIRC.

yeah, good enough for heavy hitters like the south african and
hungarian air force.

yes,considering they are poor nations and still could have bought US
or Russian aircraft.

You really think the auth african air force can afford US made
airplanes? I'll give them credit when due though, nobody wants some
russian shit either. All russian planes are good for are crashing at
airshows.
Odd,India is buying a bunch of Russian fighters.
Of course,THEY have the technology base to maintain them.
Gripen may fit their needs better than US/Russian AC.
It's designed to be field-maintainable,and have an ability use public
roads for runways.(after [or before] the usual bases are bombed out.)

Maybe they should just get some cessnas, or some retired news
helicopters. They'd be more fitting for such primitive places.

OTOH,most other modern fighters must be maintained at and operated
from military bases.

Did you just copy and paste this description of this plane from a
craiglist or yahoo auctions site, or wherever you'd buy a used kit
airplane?

Gripen is still a modern,high performance fighter.

sure it is.
Shows what you know. zip.

--
Jim Yanik
jyanik
at
localnet
dot com
 
At 2011-05-05 1:48 pm Paul Jeroni wrote in sci.electronics.repair,
"You must connect the shields, the waveforms on the scope are all
noise."

OK. With the shield of the scope lead connected to the shield of
composite output on the Armada, these are the signals while the
BIOS setup is running and when X is running in Linux.
http://members.shaw.ca/peasthope/ArmadaBIOS.jpg
http://members.shaw.ca/peasthope/ArmadaWithX.jpg

Two details. Normally the Armada is not grounded.
The external power supply has a ground pin on the plug but,
as I understand, the DC output is isolated. Secondly, the
composite signal is very jumpy. The two traces were taken
using the digital storage capability of the scope.

In these images, the big wave is the vertical refresh and the
horizontal sweep isn't resolved at this speed of the scope? So
what can be done to dissect the composite signal enough to see
why the BIOS gives an image on the TV and X does not?

I haven't ruled out use of Windows and Powerstrip as suggested
by Adrian C. Just want to apply the scope effectively as a
first step.

Thanks, ... Peter E.
 
BIOS is usually at 640x480 but Windows sets it much higher.

I do video for a living and I have no idea what those scope traces
are.

 
On Sep 8, 9:10 pm, stratu...@yahoo.com wrote:
BIOS is usually at 640x480 but Windows sets it much higher.
It was back in 2011-03 or so that I connected the Panasonic TV
to the Armada and have forgotten some details. I did set X to
640x480 and find the display on the TV still not resolved.

How closely is the composite signal tied to the built-in video on
a laptop? I wonder whether software can control composite
output independently of *VGA. Even so I'd wonder what X could do
to make the TV image fail.

I do video for a living and I have no idea what those scope traces
are.
The sweep is set at 1 ms and trigger coupling is to TV-H. How
do you connect a scope to the composite output on a computer
and what is the usual display?

Thanks, ... Peter E.
peasthope.at.shaw.ca
 
On Sep 9, 9:25 am, Peter Easthope <peasth...@shaw.ca> wrote:
On Sep 8, 9:10 pm, stratu...@yahoo.com wrote:

BIOS is usually at 640x480 but Windows sets it much higher.

It was back in 2011-03 or so that I connected the Panasonic TV
to the Armada and have forgotten some details.  I did set X to
640x480 and find the display on the TV still not resolved.

How closely is the composite signal tied to the built-in video on
a laptop?  I wonder whether software can control composite
output independently of *VGA.  Even so I'd wonder what X could do
to make the TV image fail.

I do video for a living and I have no idea what those scope
traces
are.

The sweep is set at 1 ms and trigger coupling is to TV-H.  How
do you connect a scope to the composite output on a computer
and what is the usual display?

Thanks,                        ... Peter E.
peasthope.at.shaw.ca
I hunted up the Compaq Armada docs from HP and they are not really
clear on the TV output. They say the unit puts out composite TV. Here
is a link to a Tektronix page showing SMPTE NTSC color bars on a
waveform scope. The amplitude is 1 Volt p-p into a 75 Ohm termination.
Amplitude is typically 2 Volts without the termination. Bandwidth is
4.5 MHz for standard def. Line length from H sync to H sync 63.56 uS

http://www.tek.com/Measurement/App_Notes/NTSC_Video_Msmt/wfmmonitor.html

The actual picture on the monitor of SMPTE bars

http://en.wikipedia.org/wiki/File:SMPTE_Color_Bars.svg

BTW no standard def monitor ever looked exactly like that Wiki
picture. If you made that image full screen your scope should look
like the Tek waveform scope.

Since they say the output is composite I assume the connector is an
RCA but nowhere do they ever show the connector, just the closed door
on the front of the computer.

 
On Sep 9, 8:32 pm, stratu...@yahoo.com wrote:
I hunted up the Compaq Armada docs from HP and they are not really
clear on the TV output. They say the unit puts out composite TV.
Yes.

Here is a link to a Tektronix page showing SMPTE NTSC color bars on a
waveform scope. The amplitude is 1 Volt p-p into a 75 Ohm termination.
Amplitude is typically 2 Volts without the termination. Bandwidth is
4.5 MHz for standard def. Line length from H sync to H sync 63.56 uS
Thanks. I have only a plain old BK Precision 2522 Digital Storage
Oscilloscope.
No waveform monitor. The photos I posted are just the raw video going
to the
BK 2522. Without the demodulation capability of a waveform monitor,
an
oscilloscope can not display color bars. The BK 2522 might do a
little more
in this case but I have yet to learn the skills.

Thanks, ... Peter E.
 
On Sep 14, 7:31 am, Peter Easthope <peasth...@shaw.ca> wrote:
On Sep 9, 8:32 pm, stratu...@yahoo.com wrote:

I hunted up the Compaq Armada docs from HP and they are not
really
clear on the TV output. They say the unit puts out composite TV.

Yes.

Here is a link to a Tektronix page showing SMPTE NTSC color bars
on a
waveform scope. The amplitude is 1 Volt p-p into a 75 Ohm
termination.
Amplitude is typically 2 Volts without the termination. Bandwidth
is
4.5 MHz for standard def. Line length from H sync to H sync 63.56
uS

Thanks.  I have only a plain old BK Precision 2522 Digital Storage
Oscilloscope.
No waveform monitor.  The photos I posted are just the raw video
going
to the
BK 2522.  Without the demodulation capability of a waveform
monitor,
an
oscilloscope can not display color bars.  The BK 2522 might do a
little more
in this case but I have yet to learn the skills.

Thanks,                        ... Peter E.
A waveform monitor is nothing more than a specialized scope with
preselected gains and sweep rates and a graticle in IRE units
vertically and uS horizontally rather than cm.. Your scope (and my old
Tek 475) will be just fine. I wanted you to see what the video
waveform should look like and Tektronix has excellent info on TV. The
vector scope is a different animal and is not needed for now but by
probing the chroma demodulators in a monitor could you display vectors
on your scope as well.

Bottom line: if you displayed color bars on the Compaq the scope photo
from Tek will be close to what you see on your scope once you get the
sweep and gains set up. The trickiest part of TV is triggering the
scope but many scopes have a TV mode to make it easier.

 
Has anyone here tried retrofitting low ESR capacitors to CFLs with a
view to improving their turn-on performance - i.e. so that they reach
full brightness quickly?

Sylvia.
 
Sylvia Else wrote:

Has anyone here tried retrofitting low ESR capacitors to CFLs with a
view to improving their turn-on performance - i.e. so that they reach
full brightness quickly?

Sylvia.
If you're referring to the inverter supply? I think those caps are
already of low ESR types. If not, they should be.

Jamie
 
Sylvia Else wrote:
Has anyone here tried retrofitting low ESR capacitors to CFLs with a
view to improving their turn-on performance - i.e. so that they reach
full brightness quickly?

Sylvia.
**The full brightness thing is not associated with the electronics. It's an
issue with the gas in the tube and, to a lesser extent, the phosphor
coating. You can prove this for yourself, by measuring the light output of a
standard (iron ballast) fluoro. Light output gradually increases over a few
seconds (or minutes, depending on ambient temperature).

Don't sweat it anyway, LEDs will replace them in most applications very
soon. I've been mucking about with a couple of these recently:

http://www.dealextreme.com/p/12w-3500k-800lm-warm-white-led-emitter-metal-strip-12-14v-80310

It delivers almost double the light output of an 11 Watt T5 fluoro and is
far more compact, dimmable and has nicer colour temperature.

--
Trevor Wilson
www.rageaudio.com.au
 
The low brighness when cold is not due to low PS voltages or current,
it is due to the fact that it takes time for the gas to get it up
completely. It may be possible to overshoot the target current/power
when first started to accelerate the process but this is very likely
to decrease the overall life of the CFLs.

Newr units do seem to perform better in that respect, but short of
replacing things with newer versions I think you will just have to be
patient.

J
 
On Sep 19, 6:00 pm, Sylvia Else <syl...@not.here.invalid> wrote:
Has anyone here tried retrofitting low ESR capacitors to CFLs with a
view to improving their turn-on performance - i.e. so that they reach
full brightness quickly?
I don't think capacitors are the reason for the brightness change
because even many brand-new CFLs take time to reach full brightness,
especially when in the cold (even 75F). More likely, the circuitry
just doesn't compensate for the temperature of the fluorescent tube.
For example, here's the circuit board from the base of a failed
Maxlife brand CFL. The fluorescent tube connects at F1, F2, F3, and
F4, and notice on the far right is a space for a thermistor (PTC) that
connects between F1 and F4 on the other side, through a capacitor, C8,
that's also missing. The circuit board was built so it shorts across
C8. The big capacitor in the middle is rated 22uF, 200V, and Aishi is
considered a junk brand.

Another problem is opening up the CFL to get to the circuit board and
reattaching the cover because regular glues don't work, and you want a
strong bond that won't fail at high temperature.

..

http://imageshack.us/f/62/cflinside.jpg/
 
"Jamie" = Maynard A. Philbrook, radio ham KA1LPH and total fuckwit


If you're referring to the inverter supply? I think those caps are
already of low ESR types. If not, they should be.

** Wot absurd craplogy.





..... Phil
 
"Stupider than Anyone Else on Earth "
Has anyone here tried retrofitting low ESR capacitors to CFLs with a view
to improving their turn-on performance - i.e. so that they reach full
brightness quickly?

** There are no fairies left at the bottom of this mad bitch's garden.

They all vacated decades ago in acute embarrassment.





..... Phil
 
"larry moe 'n curly"

Another problem is opening up the CFL to get to the circuit board and
reattaching the cover because regular glues don't work, and you want a
strong bond that won't fail at high temperature.


** Most CFLs use no glue at all, the halves snap fit together.

Silicone adhesive ( eg Silastic) will handle the case temp easily - can be
used to secure loose glass tubes in the case too.




..... Phil
 
On 20/09/2011 1:11 PM, Trevor Wilson wrote:
Sylvia Else wrote:
Has anyone here tried retrofitting low ESR capacitors to CFLs with a
view to improving their turn-on performance - i.e. so that they reach
full brightness quickly?

Sylvia.

**The full brightness thing is not associated with the electronics. It's an
issue with the gas in the tube and, to a lesser extent, the phosphor
coating. You can prove this for yourself, by measuring the light output of a
standard (iron ballast) fluoro. Light output gradually increases over a few
seconds (or minutes, depending on ambient temperature).

Don't sweat it anyway, LEDs will replace them in most applications very
soon. I've been mucking about with a couple of these recently:

http://www.dealextreme.com/p/12w-3500k-800lm-warm-white-led-emitter-metal-strip-12-14v-80310

It delivers almost double the light output of an 11 Watt T5 fluoro and is
far more compact, dimmable and has nicer colour temperature.
Having got used to the higher colour temperatures of CFLs, I find that I
prefer them.

Incandescents weren't given a lower colour temperature because people
preferred them, it was just the way they came out. If the first
practical domestic electric lights had been of daylight colour
temperature, I imagine that's what everyone would always have wanted,
and people would have given short shrift to this yellow rubbish.

However, I note that the led emitter strips are available in higher
colour temperatures.

Sylvia.
 
On 20/09/2011 10:00 PM, Phil Allison wrote:
"Stupider than Anyone Else on Earth"

Has anyone here tried retrofitting low ESR capacitors to CFLs with a view
to improving their turn-on performance - i.e. so that they reach full
brightness quickly?


** There are no fairies left at the bottom of this mad bitch's garden.

They all vacated decades ago in acute embarrassment.





..... Phil
What ever you think of the question (stupid, incomplete, a waste of time
etc), she did NOT ask you. A question is not an excuse for you to insult
anyone. If you don't like it don't answer
 

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