Toshiba TV29C90 problem; Image fades to black...

[CRaSH]

shred wrote:

if theres one thing i can't stand it's born again christians....if
theres someting else i can't stand it's born again christians in the
wrong place,,...keep it for church

Judging from the groups listed, the OP jacks off while working on his WIN-98
computer, in his Mustang........
Man, what a hand full (computer wise that is.. ..................

 

[kip]

Why not at least try the NTE,s they are cheap enough ,then go looking.

kip
"frontline@nospam" <frontline@email.com> wrote in message
news:1118505947.415758.292030@o13g2000cwo.googlegroups.com...

General subs and not available in matched pairs, thanks but thats not
the type of "sub" I am looking for, as of now all the info I have on
these parts is NPN/PNP and voltage and the gain group marks on the
parts but without datasheets I can not cross them to "good subs".
One other note on this amp, 50% of the caps on the driver board were
bad in both channels one was blown one was still working.
Maybe I should ask if anyone has datasheets on these S1375 and S1376
Toshiba transistors?
Thanks Kip,
Jeff

 

[NSM]

<jackbruce9999@yahoo.com> wrote in message
news:1118468615.019389.11380@f14g2000cwb.googlegroups.com...

Let me try this:

would you object to

"a sine wave which (net) results in a current that only flows in one
direction"

if you buy that, would you then accept it to be partially condensed
into:

"a sine wave which (net) results in a non-polarity-alternating current"

if you buy that, would you then accept this:

"a sine wave which (net) results in a direct current"

and then

"a (net) direct current sine wave"

I object to all of the above. Go read Scroggie's "Second thoughts on Radio
Theory".

N

 

[NSM]

"Michael Kennedy" <Mikek400@nearthlink.net> wrote in message
news:gbGdnQHVrcfT5zffRVn-jQ@comcast.com...

"William R. Walsh" <newsgroups1@saveyourspam.walshcomptech.com> wrote in
message news:UNuqe.35928$x96.3790@attbi_s72...
Hello all...

In my latest round of shopping at Curbside Discount I happened across a
very
interesting Zenith VCR. It's a Model VR-1380 and the way it takes a tape
is
rather unique. The tape is loaded "sideways". So far it looks to work
apart
from some moderately tired rubber.

http://greyghost.dyndns.org/zenithvcr/ has pictures, 640x480, 47~49Kb

Anyone ever seen another VCR that does this?

William

Thats Cool!

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5781329851

I own two of these - one working. The VCR is interesting but must be rather
complex.

N

 

[nobody]

Saw one at a flea market for $8 a few months ago. Just about bought it due
to novelty, but passed.

"William R. Walsh" <newsgroups1@saveyourspam.walshcomptech.com> wrote in
message news:UNuqe.35928$x96.3790@attbi_s72...

In my latest round of shopping at Curbside Discount I happened across a
very
interesting Zenith VCR. It's a Model VR-1380 and the way it takes a tape
is
rather unique. The tape is loaded "sideways". So far it looks to work
apart
from some moderately tired rubber.

 

[NSM]

"CRaSH" <sorry@aint-here.spam.com> wrote in message
news:UaEqe.6951$7s.1754@fed1read01...

shred wrote:
if theres one thing i can't stand it's born again christians....if
theres someting else i can't stand it's born again christians in the
wrong place,,...keep it for church

Judging from the groups listed, the OP jacks off while working on his
WIN-98
computer, in his Mustang........
Man, what a hand full (computer wise that is.. ..................

He's a notorious spammer who Google refuses to shut down.

N

 

[NSM]

"Mac" <foo@bar.net> wrote in message
newsan.2005.06.11.16.13.08.157543@bar.net...

Historically, I think what happened is that the terms originally were used
to describe two competing power sources (the war between those who wanted
a DC power grid and those who wanted an AC power grid was surprisingly
fierce). Later, the terms started getting used to describe signals, and
that is probably when the shift to the ZF- and NZF-meaning happened.

Pretty much. Even in other languages I believe that terminology is basic -
certainly German is the same (Gleichstrom. Wechselstrom.)

N

 

[tlw]

Jeff,
I still have a copy of a service bulletin I received from SAE years ago
concerning these transistors. The S1375 subs to 2SC1913 and the S1376 to
2SA913. NOTE-the lead configuration is different!!! Hope this helps.
tlw

"frontline@nospam" <frontline@email.com> wrote in message
news:1118503038.916438.318450@o13g2000cwo.googlegroups.com...

Toshiba S1375 and S1376 used in this 1979 SAE 2200 amp do not seem to
be around anymore, anyone know some good subs for them?
Thanks, Jeff

 

[Ken Weitzel]

roamer wrote:

Our screen is all blue except for red and green orbs along the perimeter.
The repair shop said it was the "degouzing" and the cost is $190. Does
that sound right? Also he said the picture was fuzzy and the tube was
likely going out. He suggested buying a new tv. Anybody have thoughts on
that?

Hi...

The spelling for the word you're using is "degaussing", if
you'd like to google it. Ignore the entries that refer to
marine operations and you'll find some entries.

For what it's worth, what you describe sounds extreme for
a magnetized tube, but it's worth a shot at degaussing it.
Nothing much to lose. 190 dollars is insane, however.

Let us know if you'd like more.

Ken

 

[Fred Abse]

On Fri, 10 Jun 2005 20:47:59 -0700, jackbruce9999 wrote:

Again, is the term "DC Sine Wave" problematic because it is fundametnally
wrong OR is it problematic because it is at odds with conventional
terminology and nomenclature.

It is fundamentally meaningless. A sine wave is a defined mathematical
function:

y = a sin(x)


I think what you are talking about is a sine wave with an added DC
component:

y = (a sin(x) + b)


which is not purely a sine wave, nor is it purely DC. It's "a sine wave
plus DC" if you like.

Referring to "a DC sine wave" is analogous to referring to "a curved
straight line".

....if it is fundamentally wrong, then please
show how.....however, if we're just talking about convention,

No, not just convention, this is engineering. The language we speak is
mathematics. I think I just showed you why.

then why
break balls? (Wait, I'm sorry, I don't mean literally "breaking balls",
that's just nomenclature).....if you were given a piece of paper a week
ago with just the words "A Fully DC Sine Wave" on it and you were asked to
come up with as many possible things it could realistically mean, how many
things could you come up with? If you were being truthful I think you
could only think of one thing (and think of it very quickly)

I could only think of only one thing: "This guy is not an engineer, or
scientist, or mathematician!"


--
"Electricity is of two kinds, positive and negative. The difference
is, I presume, that one comes a little more expensive, but is more
durable; the other is a cheaper thing, but the moths get into it."
(Stephen Leacock)

 

[Fred Abse]

On Sat, 11 Jun 2005 01:46:35 -0400, John Popelish wrote:

So only those with a very primitive view of frequency and are bothered by
describing a non alternating but time varying signal as a kind of
frequency (and informally called AC). The simple minded terms, AC and DC
are just not up to the job of describing many waveforms, unless you are
willing to be quite flexible in the usage.

In this case, the OP actually used the words "sine wave", which would
appear to preclude any such flexibility, anyway.

Where it matters, I prefer the use of "steady" or "varying"

"AC" and "DC" have overtones of Edison, Tesla, Ol' George Westinghouse,
and the unfortunate Mr. Kemmler.


--
"Electricity is of two kinds, positive and negative. The difference
is, I presume, that one comes a little more expensive, but is more
durable; the other is a cheaper thing, but the moths get into it."
(Stephen Leacock)

 

[John Fields]

On 11 Jun 2005 00:12:53 -0700, jackbruce9999@yahoo.com wrote:

Thank you for your comment, but I respectfully disagree....I could
really care less if someone used the correct terminology in describing
something, as long as I could understand what they were talking
about....

---
That's because you want to excuse yourself for your faux pas by saying
that if someone else committed it you would ignore it as long as you
could understand what they were saying, so everyone should follow your
example. What you don't seem to understand is that unless they were
using the language properly, your take on what they meant to say might
be wrong. Your use of "DC sinewave" instead of "sinusoidally varying
DC" or "a sinusoidally varying unipolar voltage" is precisely that
sort of an occurrence and your use of "DC sinewave" was critcised
because there is no such thing as a DC sinewave. This is a technical
forum and, rather than argue with the people who have taken time out
of their lives to correct you, you should do as the Romans do and
adopt the language we use instead of trying to force us to try to
understand what you're trying to say on _your_ terms. Remember, it
was you who was looking for answers, not us.
---

in fact, I run into this situation alot

---
I'm sure you do.
---

- I never, ever,
correct the use of improper terminology (until the person is
finished)....I find it to be stifling of the other person and the point
they are trying to make.....

---
You may be relating to how you feel when you're corrected. I find
that many people accept correction graciously, and the sooner the
better in order to help them to keep from making fools of themselves
over and over again.
---

You may have noticed thousands of times per day, people (in
industry) with only high school diplomas (or less) in industry make
absolutely brilliant observations and suggestions, but well over 80% of
these are ignored, poo-pooed or brushed-aside, by people with advanced
college degrees....

---
I've never noticed that, and I doubt whether you have either or that
you have anything to prove that 80% number. Sounds more to me like
you have an axe to grind.
---

many times, in part, due to the unsophisticated way
in which the ideas are expressed.....it definitely is frustrating
trying to understand what someone is saying when they use unfamilar or
unconventional terminology, but it really can pay off big to suffer
through it......

---
And just what gifts do you have to offer us for suffering through
_your_ presentation?


--
John Fields
Professional Circuit Designer

 

[BFoelsch]

If you learn the math the definition of AC and DC is totally irrelevant.
Your original Question #1 indicates that you don't know the math. That is
fine; it is something you can learn, but no amount of quibbling over
semantics is going to change the principles of circuits.

Forget the encyclopedia, learn differential equations instead. Encyclopedia
are for junior high school kids.

<jackbruce9999@yahoo.com> wrote in message
news:1118469215.335373.322910@g47g2000cwa.googlegroups.com...

I will absolutely buy what you said, but understand the import of what
you're saying....you're saying that the language of "AC" and "DC" has
essentially been somewhat bastardized from its original meanings to
also mean zero-frequency and non-zero-frequency signals. Therefore, to
describe a 10Vpp signal with a 10VDC offset as an "AC" signal is
actually contrary to the original connation of "alternating current"
since it (net) results in a signal which yields only a mono-directional
(i.e. direct) current flow (albeit time variant). So in a sense, you
could say I am holding "pure" to the original (circa 1890's) definition
of AC/DC while its use has been "officially" corrupted to cover the
concepts of "zero frequency" and "non-zero-freuency".

Agree?

 

[TimPerry]

"Pooh Bear" <rabbitsfriendsandrelations@hotmail.com> wrote in message
news:42AAF052.9F7158DC@hotmail.com...

jackbruce9999@yahoo.com wrote:

.see also this previous thread where someone else uses the same
terminology ("DC sine wave")....

Just because someone else used the term doesn't make it right ! There's
plenty of rubbish spouted on the net.

Graham

Once in a while someone coins a new term like Heinleins' waldo... but I
don't think its going to happen here.

What has been described is similar to the waveform one would see on the grid
of a class A tube circuit. (but negative voltage of course)

There are a number of waveforms that go in only one direction relative to
ground such as sawtooth waves, square waves, and triangle waves. To refer
to these as say a "DC triangle wave" would be equally confusing without
further qualification.

The closest descriptor that I can think of offhand that might meet with
general acceptance would be "bias signal".

 

[roamer]

Thank you for your help. I've researched the degaussing and it sounds like
that is what happened. Just before it occured we had placed a new room
air purifier about 4' away from the TV. We'll see if it doesn't work
itself out and if it doesn't find a more reasonable repair shop.

 

[Tom MacIntyre]

On Sat, 11 Jun 2005 13:49:05 -0400, "roamer" <smasters916@cox.net>
wrote:

Our screen is all blue except for red and green orbs along the perimeter.
The repair shop said it was the "degouzing" and the cost is $190. Does
that sound right? Also he said the picture was fuzzy and the tube was
likely going out. He suggested buying a new tv. Anybody have thoughts on
that?

Is there any video at all. Sony aperture grill CRT's don't take well
to strong degaussing, if my memory of Sony training manuals is
correct. Was the shop you took it to Sony-authorized? Sometimes that
can make a difference.

Tom

 

[NSM]

"Captain Mooboy" <mooboynyc@gmail.com> wrote in message
news:1118521774.459465.147580@z14g2000cwz.googlegroups.com...

Hi,

I have a new (< 1 month) Canon ZR200, and the other day, the camcorder
stopped working with the battery. The camera works fine with the AC
adapter plugged in, but it seems as if the connection to the battery
has been severed (something loose from the shipping?) because:
1) there's no power with just the battery, and
2) the red recharge light doesn't go on when I plug in the AC adaptor

I know I could send this in to Canon for repair, but I was hoping to
avoid the two weeks plus without it if there's an easy fix. Does
anyone have any pointers?

Ask your dealer to try a new battery.

N

 

[R. Steve Walz]

jackbruce9999@yahoo.com wrote:

Again, is the term "DC Sine Wave" problematic because it is
fundametnally wrong OR is it problematic because it is at odds with
conventional terminology and nomenclature.....if it is fundamentally
wrong, then please show how.....however, if we're just talking about
convention, then why break balls? (Wait, I'm sorry, I don't mean
literally "breaking balls", that's just nomenclature).....if you were
given a piece of paper a week ago with just the words "A Fully DC Sine
Wave" on it and you were asked to come up with as many possible things
it could realistically mean, how many things could you come up with?
If you were being truthful I think you could only think of one thing
(and think of it very quickly).

If you think that the term "fully DC Sine Wave" even means anything,
then you have not understood the coursework.
-------------

Don't freak out, a sine wave with a DC offset so that it is all
pulsating DC is not at all unusual, every transistor amp has one
since transistors can only accomodate one polarity of current.

-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public

 

[Bob Penoyer]

On Sat, 11 Jun 2005 10:36:54 -0400, "Tam/WB2TT"
<t-tammaru@c0mca$t.net> wrote:

<snip>

Yes. DC by definition is zero frequency.

Um, no. DC is Direct Current, i.e., current that flows in one
direction. For example, the output from a rectifier is DC but it
certainly isn't "zero frequency."

The output of a rectifier contains both AC and DC. You put a filter on it to
get close to pure DC.

A rectified AC waveform contains DC and AC components but if the
current isn't changing direction, it isn't alternating current. And,
if it isn't AC, it's DC.

 

[Don Kelly]

You have a 10V Dc ssignal with a superimposed 5V p-p signal.
The load's impedance to DC is determined by the load's DC resistance (steady
state )
The load's impedance to AC will be determined by its R (ac not Dc) ,L,C
combination (steady state)
The two are different and independent values.

--
Don Kelly
dhky@peeshaw.ca
remove the urine to answer
<jackbruce9999@yahoo.com> wrote in message
news:1118440502.677562.89730@g43g2000cwa.googlegroups.com...

2 questions about a fully DC Sine Wave....let's suppose you have a DC
Sine wave which varies from +5V to +15V peak-to-peak going into a load
with R, L, and C components.....

Question #1:
Is the load's impedance a function of R, L, and C (and wave frequency)
or is it simply just R (i.e. Z=R)? In other words does non-resistive
impedance (L + C) really only matter with an AC signal OR anytime
voltage varies periodically (even if it is all DC)?


Question #2:
Would a "regular" negative peak detector ciruit, like shown here:


http://www.elektroda.net/cir/index/Detector%20Circuits/NEGATIVE%20PEAK%20DETECTOR.htmgative


work for the DC Wave described? Will it output +5V or do negative peak
detectors only work for AC signals?

Thank you.