sci.electronics.repair - 25 new messages in 12 topics - digest

sci.electronics.repair
http://groups.google.com/group/sci.electronics.repair?hl=en

sci.electronics.repair@googlegroups.com

Today's topics:

==============================================================================
TOPIC: ReverbaMate, Sole Mate , spring reverb
http://groups.google.com/group/sci.electronics.repair/t/a2ecc5b273e20721?hl=en
==============================================================================

== 1 of 2 ==
Date: Tues, Jan 18 2011 12:59 am
From: "N_Cook"

Got back to the over-overdrive problem. Send side of the springline easily
driven into clipping , I will try reducing the gain of the send side amp and
increase the gain of the receive side and add some mechanical/acoustic
decoupling to the tank

== 2 of 2 ==
Date: Tues, Jan 18 2011 7:24 am
From: "N_Cook"

No longer clipping on large signal input. Originally the tank held by 4
large bolts , large enough to hold a 500W transformer, not a 2 ounce reverb
tank. Decoupled with 4 small bolts passing thru 4 of those floppy rubber CD
optical deck vibration decouplers, so no direct metal coupling now between
tank and case. Much the same throughput so hopefully a mod repeatable in
this generic fault area of external reverb boxes.

==============================================================================
TOPIC: replacing smps component
http://groups.google.com/group/sci.electronics.repair/t/29494d0ac0be614b?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Jan 18 2011 3:48 am
From: frank@notvalid.it

Wild_Bill <wb_wildbill@xspamyahoo.com> wrote:
> With that much damage obvious just by visual inspection, I'd suspect that
> the other boards also have damaged components.
>
> I might try to use some alternate power supplies to see if the monitor can
> display an image before attempting to locate parts for the SMPS.. even if
> the image might only be the OSD on-screen display stating "no input signal"
> could be considered a good sign, indicating that the other boards might not
> be damaged (a definite maybe).
>
> Many LCDs only need a couple of voltages to operate.. some may be minus (-)
> supplies, but other than correct polarity, fairly common voltages.

I just did it, the LCD requires only +5 and +12 and the HV for backlight.
Unfortunately the inverters for the backlight are on the smps board so the
screen remained dark but I coul see some activity in the dark.
Hard to tell if everything is ok, but there's some life.
I think I'll order a complete smps replacement board from china (which will
last a couple of years again).

Thanks

Frank IZ8DWF

==============================================================================
TOPIC: THE TRUTH TO MAKING $13,693.94 IN 48 HOURS
http://groups.google.com/group/sci.electronics.repair/t/57bb723e1561e384?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Jan 18 2011 3:55 am
From: superman

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==============================================================================
TOPIC: //free mobile software
http://groups.google.com/group/sci.electronics.repair/t/2777a6a23398767c?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Jan 18 2011 5:22 am
From: anjana

http://www.celebsimzs.com

==============================================================================
TOPIC: Sanyo TV
http://groups.google.com/group/sci.electronics.repair/t/9e4c8f5b72f9e8d7?hl=en
==============================================================================

== 1 of 2 ==
Date: Tues, Jan 18 2011 5:23 am
From: PeterD

On Mon, 17 Jan 2011 23:30:37 -0500, "Michael A. Terrell"
<mike.terrell@earthlink.net> wrote:

>
> Yawn. Phil is in Australia. It's also where you should be. They
>don't require you to have brains in the outback.

Gee, Michael, the guy was falling down drunk when he wrote that, give
the poor lush a break! <g>

== 2 of 2 ==
Date: Mon, Jan 17 2011 9:30 pm
From: Michael Gross

Michael A. Terrell wrote:

>
>
> Yawn. Phil is in Australia. It's also where you should be. They
> don't require you to have brains in the outback.
>
>

If I had a fucking pig here, I would fucking kill it right here on
camera. I don't give a fuck. I like to eat. Fuck him. I'll cut his
throat with a knife, I'll do it with my teeth. I don't give a shit. I
really don't give a fuck. That's what I think.

I'm trolling on USENET because I can and if I want to go fucking down
here in town to the meat shop, if I want to get a pig and if I want to
come home and butcher it in my front yard motherfucker I'm going to do
it. Fuck it. If I'm going to eat motherfucker I'm going to eat. As you
can see, I'm fat. I like to eat.

So, maybe I will. Maybe I'll make a video, just figure out the most
brutal way we can murder a pig so I can get me some bacon for tomorrow
for breakfast. I don't know but I'm going to do what the fuck I want to
do. You guys can keep talking shit, but I'm going to do what the fuck I
want to anyway.

You know, keep on hating. I'm going to keep on doing what the fuck I
want to do and it's whatever. So when it comes down to it, you ain't shit.

==============================================================================
TOPIC: Magnetized tools
http://groups.google.com/group/sci.electronics.repair/t/f3276f33a4102318?hl=en
==============================================================================

== 1 of 4 ==
Date: Tues, Jan 18 2011 9:16 am
From: Jeff Liebermann

On Mon, 17 Jan 2011 15:36:49 -0700, D Yuniskis
<not.going.to.be@seen.com> wrote:

>I'm wondering if there are any un-obvious (obscure?)
>cases where I might screw myself by using such a tool
>when I *shouldn't*?

I was demagnetizing all my tools (with a bulk tape eraser) for many
years. One day, I noticed that the typical 5.25" floppy disk drive
has a rather powerful rotating magnet positioned about 5mm away from
the floppy disk. If that didn't trash the floppy, I doubt that my
screwdriver would have any effect. So, I went the other direction and
started magnetizing all my tools, which turned out to be rather handy
for inserting screws in difficult locations. The only time these
tools caused a problem was when I accidentally placed a magnetized
screwdriver directly on top of a 5.25" floppy disk. Due to increased
spacing and protection provided by the plastic case in 3.5" floppies,
I haven't had any problems with those.

Unless you're working with magnetic compasses, magnetometers, flux
gate compasses, CRT's, or magnetic field measuring equipment, I don't
seem much danger or risk from magnetized tools. However, if you're
playing with the powerful magnets found inside most hard disk drives,
methinks you should probably exercise some concientious care in
keeping them away from any magnetic storage material. A "keeper" is
usually sufficient (such as my steel desk).

<http://www.wihatools.com/400seri/40010ser.htm>

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

== 2 of 4 ==
Date: Tues, Jan 18 2011 9:33 am
From: "William Sommerwerck"

> Unless you're working with magnetic compasses, magnetometers,
> flux gate compasses, CRT's, or magnetic field measuring equipment,
> I don't see much danger or risk from magnetized tools. However, if
> you're playing with the powerful magnets found inside most hard disk
> drives, methinks you should probably exercise some concientious
> care in keeping them away from any magnetic storage material.
> A "keeper" is usually sufficient (such as my steel desk).

I still wouldn't bring a magnetized tool near an analog tape recorder's play
head. However... as you'd demagnetize the head "as a matter of course" after
servicing the recorder, it probably doesn't matter.

== 3 of 4 ==
Date: Tues, Jan 18 2011 9:41 am
From: Meat Plow

On Tue, 18 Jan 2011 09:33:35 -0800, William Sommerwerck wrote:

>> Unless you're working with magnetic compasses, magnetometers, flux gate
>> compasses, CRT's, or magnetic field measuring equipment, I don't see
>> much danger or risk from magnetized tools. However, if you're playing
>> with the powerful magnets found inside most hard disk drives, methinks
>> you should probably exercise some concientious care in keeping them
>> away from any magnetic storage material. A "keeper" is usually
>> sufficient (such as my steel desk).
>
> I still wouldn't bring a magnetized tool near an analog tape recorder's
> play head. However... as you'd demagnetize the head "as a matter of
> course" after servicing the recorder, it probably doesn't matter.

Heads were always demagged before leaving my bench so it wasn't ever an
issue for me.

--
Live Fast, Die Young and Leave a Pretty Corpse

== 4 of 4 ==
Date: Tues, Jan 18 2011 1:33 pm
From: "hrhofmann@att.net"

On Jan 18, 11:41 am, Meat Plow <mhyw...@yahoo.com> wrote:
> On Tue, 18 Jan 2011 09:33:35 -0800, William Sommerwerck wrote:
> >> Unless you're working with magnetic compasses, magnetometers, flux gate
> >> compasses, CRT's, or magnetic field measuring equipment, I don't see
> >> much danger or risk from magnetized tools. However, if you're playing
> >> with the powerful magnets found inside most hard disk drives, methinks
> >> you should probably exercise some concientious care in keeping them
> >> away from any magnetic storage material. A "keeper" is usually
> >> sufficient (such as my steel desk).
>
> > I still wouldn't bring a magnetized tool near an analog tape recorder's
> > play head. However... as you'd demagnetize the head "as a matter of
> > course" after servicing the recorder, it probably doesn't matter.
>
> Heads were always demagged before leaving my bench so it wasn't ever an
> issue for me.
>
> --
> Live Fast, Die Young and Leave a Pretty Corpse

I use old microwave magnetrons a number of places around my workshop
and have never had any problems, I just keep them away from crt's and
anything that has a magnetic tape involved. They are very handy for
magnetizing tools, just draw the screwdriver across the surface and
you're done.

==============================================================================
TOPIC: PING Jeff Lierbermann
http://groups.google.com/group/sci.electronics.repair/t/46f79b8caaff41aa?hl=en
==============================================================================

== 1 of 4 ==
Date: Tues, Jan 18 2011 9:22 am
From: Meat Plow

Got this out of a Yahoo article today:

A group of more than 100 scientists and experts say in a new report that
California faces the risk of a massive "superstorm" that could flood a
quarter of the state's homes and cause $300 billion to $400 billion in
damage. Researchers point out that the potential scale of destruction in
this storm scenario is four or five times the amount of damage that could
be wrought by a major earthquake.

It sounds like the plot of an apocalyptic action movie, but scientists
with the U.S. Geological Survey warned federal and state emergency
officials that California's geological history shows such "superstorms"
have happened in the past, and should be added to the long list of
natural disasters to worry about in the Golden State.

--
Live Fast, Die Young and Leave a Pretty Corpse

== 2 of 4 ==
Date: Tues, Jan 18 2011 10:15 am
From: "tm"

"Meat Plow" <mhywatt@yahoo.com> wrote in message
news:pan.2011.01.18.17.21.41@lmao.lol.lol...
> Got this out of a Yahoo article today:
>
> A group of more than 100 scientists and experts say in a new report that
> California faces the risk of a massive "superstorm" that could flood a
> quarter of the state's homes and cause $300 billion to $400 billion in
> damage. Researchers point out that the potential scale of destruction in
> this storm scenario is four or five times the amount of damage that could
> be wrought by a major earthquake.
>
> It sounds like the plot of an apocalyptic action movie, but scientists
> with the U.S. Geological Survey warned federal and state emergency
> officials that California's geological history shows such "superstorms"
> have happened in the past, and should be added to the long list of
> natural disasters to worry about in the Golden State.
>
>
>
> --

More studies are needed!

== 3 of 4 ==
Date: Tues, Jan 18 2011 11:31 am
From: DarkwaterBlight

On Jan 18, 1:15 pm, "tm" <the_obamun...@whitehouse.gov> wrote:
> "Meat Plow" <mhyw...@yahoo.com> wrote in message
>
> news:pan.2011.01.18.17.21.41@lmao.lol.lol...
>
>
>
>
>
> > Got this out of a Yahoo article today:
>
> > A group of more than 100 scientists and experts say in a new report that
> > California faces the risk of a massive "superstorm" that could flood a
> > quarter of the state's homes and cause $300 billion to $400 billion in
> > damage. Researchers point out that the potential scale of destruction in
> > this storm scenario is four or five times the amount of damage that could
> > be wrought by a major earthquake.
>
> > It sounds like the plot of an apocalyptic action movie, but scientists
> > with the U.S. Geological Survey warned federal and state emergency
> > officials that California's geological history shows such "superstorms"
> > have happened in the past, and should be added to the long list of
> > natural disasters to worry about in the Golden State.
>
> > --
>
> More studies are needed!
>
> tm- Hide quoted text -
>
> - Show quoted text -

Well not inconceivable! Take a look at the doppler for today!
http://www.weather.com/maps/geography/pacific/pacificoceansatellite_large_animated.html

== 4 of 4 ==
Date: Tues, Jan 18 2011 11:51 am
From: Meat Plow

On Tue, 18 Jan 2011 11:31:57 -0800, DarkwaterBlight wrote:

> On Jan 18, 1:15 pm, "tm" <the_obamun...@whitehouse.gov> wrote:
>> "Meat Plow" <mhyw...@yahoo.com> wrote in message
>>
>> news:pan.2011.01.18.17.21.41@lmao.lol.lol...
>>
>>
>>
>>
>>
>> > Got this out of a Yahoo article today:
>>
>> > A group of more than 100 scientists and experts say in a new report
>> > that California faces the risk of a massive "superstorm" that could
>> > flood a quarter of the state's homes and cause $300 billion to $400
>> > billion in damage. Researchers point out that the potential scale of
>> > destruction in this storm scenario is four or five times the amount
>> > of damage that could be wrought by a major earthquake.
>>
>> > It sounds like the plot of an apocalyptic action movie, but
>> > scientists with the U.S. Geological Survey warned federal and state
>> > emergency officials that California's geological history shows such
>> > "superstorms" have happened in the past, and should be added to the
>> > long list of natural disasters to worry about in the Golden State.
>>
>> > --
>>
>> More studies are needed!
>>
>> tm- Hide quoted text -
>>
>> - Show quoted text -
>
> Well not inconceivable! Take a look at the doppler for today!
> http://www.weather.com/maps/geography/pacific/
pacificoceansatellite_large_animated.html

http://www.goes.noaa.gov/GSSLOOPS/wcwv.html

--
Live Fast, Die Young and Leave a Pretty Corpse

==============================================================================
TOPIC: Founs: Rich seam of schematics.
http://groups.google.com/group/sci.electronics.repair/t/359e8e96c660f891?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Jan 18 2011 9:36 am
From: "Ian Field"

A bit slow, and likely to be even more so if everyone wades in at once but
here's the link:

http://j.mdownload1.free.fr/Schemas/

==============================================================================
TOPIC: Simple Question about Thermal Cutoff (tco) & Fuses
http://groups.google.com/group/sci.electronics.repair/t/9522848ef646160c?hl=en
==============================================================================

== 1 of 3 ==
Date: Tues, Jan 18 2011 10:18 am
From: DarkwaterBlight

On Jan 17, 6:43 pm, j barnes <slywink...@gmail.com> wrote:
> I have a samovar (an electric tea kettle) with a bad thermal cut off fuse that runs immediately after the 120v input plug The TCO is rated at 4amp and 152C. I cannot locate this fuse anywhere but here:
>
> http://www.gift-centre.com/store/product/7450/Samovar-Fuse-SSFCHW-E4A00/
>
> $30 seems awfully steep for this part.
>
> Would it be safe for me to replace the 4AMP TCO with a 10amp 152C and simply add a 4amp fuse immediately before or after the TCO? Intuitively this seems like it would work, more than 152C the TCO burns, more than 4amps the other fuse blows.
>
> Thanks!

A 22QBP152 is the same part and retails for about $7

== 2 of 3 ==
Date: Tues, Jan 18 2011 1:55 pm
From: nesesu

On Jan 17, 6:05 pm, "Phil Allison" <phi...@tpg.com.au> wrote:
> "j barnes"
>
> > Would it be safe for me to replace the 4AMP TCO with a 10amp 152C
>
> ** Yes.
>
> The amp rating is not important long as it is more than 4.
>
> .... Phil

FWIW, I have delved into several of my wife's sewing appliances that
were originally designed for European countries and they seem to
forget the current issue in adapting from 240V to 120V for the NA
market. Her two irons both failed from the overtemperature safety
cutout [self resetting thermal breaker] contacts burning, even through
the cutout should never have tripped. They were rated for 6A and the
irons draw about 12A at 120V. In both cases the cutout is spot welded
to the base assembly and not replaceable. New plate $85.
Similar with the old foot controllers for sewing machines where the
contacts look to have ample voltage clearances, but marginal contact
area. One Bernina has actually burnt one contact half away over the
last 50 odd years.
I cannot see a Samovar taking much less than 1000-1200watts, like most
kettles, so I would, myself, use a 10A rated cutout. Naturally, when
installing it, it is best to crimp the connections or spot weld but,
in any case, you must wrap the new one time thermal fuse in a wet rag
to keep it cool while attaching it.

Neil S.

== 3 of 3 ==
Date: Tues, Jan 18 2011 2:06 pm
From: "Phil Allison"

"nesesu"
"Phil Allison"
> "j barnes"
>
> > Would it be safe for me to replace the 4AMP TCO with a 10amp 152C
>
> ** Yes.
>
> The amp rating is not important long as it is more than 4.
>

** The device in question here is a "one shot" thermal fuse.

There are no contacts inside.

I cannot see a Samovar taking much less than 1000-1200watts, like most
kettles, so I would, myself, use a 10A rated cutout. Naturally, when
installing it, it is best to crimp the connections or spot weld but,
in any case, you must wrap the new one time thermal fuse in a wet rag
to keep it cool while attaching it.

** Hardly necessary if you crimp the wires - and anyone with reasonable
soldering skills can solder the lead ends quickly without heating the body
to 152C.

..... Phil

==============================================================================
TOPIC: How to repair an invisible machine from the 23rd century?
http://groups.google.com/group/sci.electronics.repair/t/e431feeea64c740f?hl=en
==============================================================================

== 1 of 4 ==
Date: Tues, Jan 18 2011 11:40 am
From: "Lloyd Hearsewave"

I've found an invisible machine from the 23rd century, but it's not working.

How can I repair it?

== 2 of 4 ==
Date: Tues, Jan 18 2011 11:48 am
From: David Nebenzahl

On 1/18/2011 11:40 AM Lloyd Hearsewave spake thus:

> I've found an invisible machine from the 23rd century, but it's not working.
>
> How can I repair it?

Shoot, why do we always have to answer these newbie questions? Use your
time machine, of course. Everyone knows that!

--
Comment on quaint Usenet customs, from Usenet:

To me, the *plonk...* reminds me of the old man at the public hearing
who stands to make his point, then removes his hearing aid as a sign
that he is not going to hear any rebuttals.

== 3 of 4 ==
Date: Tues, Jan 18 2011 12:18 pm
From: news@jecarter.us

On Tue, 18 Jan 2011 20:40:29 +0100, "Lloyd Hearsewave"
<sore_printer@yahoo.com> wrote:

>I've found an invisible machine from the 23rd century, but it's not working.
>
>How can I repair it?
>

That requires specific test equipment:

Revisible Variable Intensity UV/IR Worklight: $2,399 (Availablity
50 years)

Revisible Digital Voltmeter (w/sub-micro probes): $11,999

Revisible Digital Oscilloscope and Locic Analyzer: $239,999

Revisible Solder Sucker (with sub-micro tip): $9,499 (Availablity
50 years)

Revisible Soldering Station: $23,999
(with Temperature and Visibility Controls)

Revisible Lead/Mercury/Arsenic Solder (1 oz.) $535 (Availablity 50
years)
(EPA permit to use solder $35,000/year)

Revisible Protetive Suit, Mask, Gloves for one person: $47,395

Revisible Moble Clean Room (with 4 suit air supply, negative pressure
air exchanger, 40KW UPS (2 hours): $1,345,495

More information available at www.revisible.com
Interest-free payment plan: 5% down, 2%/year until delivery.

Products without an availability date have an estimated lead time of
200 years.

John

== 4 of 4 ==
Date: Tues, Jan 18 2011 1:05 pm
From: David Nebenzahl

On 1/18/2011 12:18 PM news@jecarter.us spake thus:

> On Tue, 18 Jan 2011 20:40:29 +0100, "Lloyd Hearsewave"
> <sore_printer@yahoo.com> wrote:
>
>> I've found an invisible machine from the 23rd century, but it's not
>> working.
>>
>> How can I repair it?
>
> That requires specific test equipment:
>
> Revisible Variable Intensity UV/IR Worklight: $2,399 (Availablity
> 50 years)
>
> Revisible Digital Voltmeter (w/sub-micro probes): $11,999
>
> Revisible Digital Oscilloscope and Locic Analyzer: $239,999

[snip]

> More information available at www.revisible.com

OMG; do you realize that domain is available? For $1.495?

I'm not shitting you. Check it out. (If you're worried, the URL above
redirects to
http://www.hugedomains.com/domain_profile.cfm?d=revisible&e=com)

--
Comment on quaint Usenet customs, from Usenet:

To me, the *plonk...* reminds me of the old man at the public hearing
who stands to make his point, then removes his hearing aid as a sign
that he is not going to hear any rebuttals.

==============================================================================
TOPIC: TV picture distorted
http://groups.google.com/group/sci.electronics.repair/t/ec61658f4376abe1?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Jan 18 2011 1:34 pm
From: "hrhofmann@att.net"

On Jan 17, 1:10 am, "``ZACK``" <youwillfine...@home.com.au> wrote:
> "PE" <p...@ix.netcom.com> wrote in message
>
> news:_PednQsdJv8fOK7QnZ2dnUVZ_tOdnZ2d@earthlink.com...> Hi all: My 15-yr old Toshiba 27" crt television has recently developed a
> > problem which is that approx 15 minutes after being turned on, the picture
> > bows inward on the left and right sides. Then, after a few more minutes,
> > the picture resolves and returns to normal and remains perfect for the
> > remaining time the tv is on. If the symptom described above means the crt
> > is wearing out, so be it, the set will soon be history. However, I'm
> > wondering whether some other, replaceable part, might be going bad and
> > causing the temporarily distorted picture.
>
> > Would appreciate any suggestions re. probable cause(s) of symptom
> > described above. Am basically novice, but handy and with soldering
> > skills, and have done a few simple tv repairs in the past. Thanks for
> > your replies!
>
> horizontal coupling cap
> faulty yoke
> or flyback tranformer circuit
> pincushion transformer circuit
> or try herehttp://www.devileye.net/catalog/boiling_liquefied_gas/side_pincushion...
>
> orhttp://www.google.com.au/search?hl=en&client=firefox-a&hs=bCP&rls=org...

DIdn't you get enough relies on alt.home.repair????

==============================================================================
TOPIC: Electronic curiosities
http://groups.google.com/group/sci.electronics.repair/t/92fb1a53d8547e80?hl=en
==============================================================================

== 1 of 1 ==
Date: Tues, Jan 18 2011 1:44 pm
From: "hrhofmann@att.net"

On Jan 17, 7:14 am, "William Sommerwerck" <grizzledgee...@comcast.net>
wrote:
> "David Nebenzahl" <nob...@but.us.chickens> wrote in message
>
> news:4d33a563$0$2370$822641b3@news.adtechcomputers.com...
>
> > On 1/16/2011 3:14 PM William Sommerwerck spake thus:
> >> You also need to learn about Laplace transforms. They make
> >> it possible to analyze circuits with simple algebra, rather than
> >> differential equations. Very, very handy.
> > No doubt. Wouldn't hurt to know Fourier analysis either, and I'm
> > sure a bunch of other techniques.
>
> Fourier analysis is worth understanding on a theoretical level, but actually
> performing the analysis is something that's commonly left to computers.

Thank God for computers!!

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