sci.electronics.repair - 25 new messages in 10 topics - digest

sci.electronics.repair
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Today's topics:

==============================================================================
TOPIC: Strangely marked BUZ Mosfet
http://groups.google.com/group/sci.electronics.repair/t/aff797bedba2c908?hl=en
==============================================================================

== 1 of 12 ==
Date: Thurs, Apr 7 2011 12:52 am
From: "N_Cook"

Gareth Magennis <sound.service@btconnect.com> wrote in message
news:p-SdnRAdzr627QHQnZ2dnUVZ8oydnZ2d@bt.com...
> Hi,
>
> I have a Trace Elliot 300W bass amp here that uses 2 pairs of BUZ901/906
> mosfets. All output devices have been resoldered or replaced at some
point,
> and the amp now contains 2 x BUZ901 (SML) and 2 marked STUD1P.
>
> I've repaired a few of these in my time but never come across this
marking.
> Is it a Trace internal number, or have these been substituted in from
> elsewhere? Are they actually BUZ906?
>
> (One BUZ901 is blown, the other 3 check out OK on a PEAK component
tester).
>
>
> Cheers,
>
>
>
> Gareth.
>
>

perhaps obtained from these people
http://www.autogarduk.com/stock%20list%2027.htm
41 P and 274 N

What are the test parameters of a Peak?

== 2 of 12 ==
Date: Thurs, Apr 7 2011 2:14 am
From: "Gareth Magennis"

"N_Cook" <diverse@tcp.co.uk> wrote in message
news:ini43d$nfo$1@dont-email.me...
> Gareth Magennis <sound.service@btconnect.com> wrote in message
> news:p-SdnRAdzr627QHQnZ2dnUVZ8oydnZ2d@bt.com...
>> Hi,
>>
>> I have a Trace Elliot 300W bass amp here that uses 2 pairs of BUZ901/906
>> mosfets. All output devices have been resoldered or replaced at some
> point,
>> and the amp now contains 2 x BUZ901 (SML) and 2 marked STUD1P.
>>
>> I've repaired a few of these in my time but never come across this
> marking.
>> Is it a Trace internal number, or have these been substituted in from
>> elsewhere? Are they actually BUZ906?
>>
>> (One BUZ901 is blown, the other 3 check out OK on a PEAK component
> tester).
>>
>>
>> Cheers,
>>
>>
>>
>> Gareth.
>>
>>
>
>
> While at it toroidal mains Tx ? any inrush limitation ? no ken those
> markings.
> Trace Elliot GP12 SMX, 1998 300W bass amp last week PA was marked "Bipolar
> Bear" on overlay and devices under spring clips, not seen , but checked
> out
> as BCE npn & pnp devices
>
>

Toroid and no inrush limit device. The Bipolar Bear uses 2SA1695 and
2SC4468 devices.

Gareth.

== 3 of 12 ==
Date: Thurs, Apr 7 2011 2:17 am
From: "Phil Allison"

"Gareth Magennis"
>
>
> Doesn't display voltage information, it either says its a "* channel
> mosfet" and identifies the pins,

** IS THE *SOURCE* ON THE FUCKING CASE OR NOT !!!

You FUCKING MORON !!

.....Phil

== 4 of 12 ==
Date: Thurs, Apr 7 2011 2:21 am
From: "Gareth Magennis"

"Phil Allison" <phil_a@tpg.com.au> wrote in message
news:905dp7F62vU1@mid.individual.net...
>
> "Gareth Magennis"
>>
>>
>> Doesn't display voltage information, it either says its a "* channel
>> mosfet" and identifies the pins,
>
>
> ** IS THE *SOURCE* ON THE FUCKING CASE OR NOT !!!
>
> You FUCKING MORON !!
>
>
>
> .....Phil
>
>
>
>

Bye bye.

== 5 of 12 ==
Date: Thurs, Apr 7 2011 2:37 am
From: "Gareth Magennis"

"N_Cook" <diverse@tcp.co.uk> wrote in message
news:injqf8$vi8$1@dont-email.me...
> Gareth Magennis <sound.service@btconnect.com> wrote in message
> news:p-SdnRAdzr627QHQnZ2dnUVZ8oydnZ2d@bt.com...
>> Hi,
>>
>> I have a Trace Elliot 300W bass amp here that uses 2 pairs of BUZ901/906
>> mosfets. All output devices have been resoldered or replaced at some
> point,
>> and the amp now contains 2 x BUZ901 (SML) and 2 marked STUD1P.
>>
>> I've repaired a few of these in my time but never come across this
> marking.
>> Is it a Trace internal number, or have these been substituted in from
>> elsewhere? Are they actually BUZ906?
>>
>> (One BUZ901 is blown, the other 3 check out OK on a PEAK component
> tester).
>>
>>
>> Cheers,
>>
>>
>>
>> Gareth.
>>
>>
>
>
> perhaps obtained from these people
> http://www.autogarduk.com/stock%20list%2027.htm
> 41 P and 274 N
>
> What are the test parameters of a Peak?
>
>

Don't have a clue. It runs on a 9v battery.

It does claim to measure hfe, but again I don't know with which parameters.
I don't think its meant to be a precision instrument but I find it very
useful, mostly for finding dead mosfets and possible good ones, and
identifying pinouts of bipolars.

I once had terrible problems with a C-audio amp that I just couldn't get
working. They had loads of BC184 (I think) doing the bias and stuff. I
replaced the lot with BC184L, not realising that the "L" meant the pinout
was different. Took me a looong time to suss that one out.
Now I always double check with the Peak when replacing any signal
transistor, just in case.

Likewise Farnell once sold me some resistors that were a decade lower than
marked on the packaging. Again took me a while to suss out the problem, and
I now always meter EVERY resistor before soldering it in.

Cheers,

Gareth.

== 6 of 12 ==
Date: Thurs, Apr 7 2011 5:05 am
From: "Phil Allison"

"Gareth Magennis"
>
>>> Doesn't display voltage information, it either says its a "* channel
>>> mosfet" and identifies the pins,
>>
>>
>> ** IS THE *SOURCE* ON THE FUCKING CASE OR NOT !!!
>>
>> You FUCKING MORON !!

>
> Bye bye.

** FFS - asshole !!

What the FUCKING HELL is wrong with you ????

Is it gonna KILL YOU to post a simple, factual reply ???

The ANSWER to MY question is the ANSWER to YOUR question !!

Did your mom refuse to breast feed you ? ?

Did your dad fuck you up the arse when you were two?? ??

JESUS FUCKING CHRIST alive ...............

You gotta be the most RETARDED autistic pommy cunt ALIVE !!

..... Phil

== 7 of 12 ==
Date: Thurs, Apr 7 2011 3:47 am
From: "N_Cook"

Gareth Magennis <sound.service@btconnect.com> wrote in message
news:ANidnUiZgbJ9GADQnZ2dnUVZ8mCdnZ2d@bt.com...
>
> "N_Cook" <diverse@tcp.co.uk> wrote in message
> news:injqf8$vi8$1@dont-email.me...
> > Gareth Magennis <sound.service@btconnect.com> wrote in message
> > news:p-SdnRAdzr627QHQnZ2dnUVZ8oydnZ2d@bt.com...
> >> Hi,
> >>
> >> I have a Trace Elliot 300W bass amp here that uses 2 pairs of
BUZ901/906
> >> mosfets. All output devices have been resoldered or replaced at some
> > point,
> >> and the amp now contains 2 x BUZ901 (SML) and 2 marked STUD1P.
> >>
> >> I've repaired a few of these in my time but never come across this
> > marking.
> >> Is it a Trace internal number, or have these been substituted in from
> >> elsewhere? Are they actually BUZ906?
> >>
> >> (One BUZ901 is blown, the other 3 check out OK on a PEAK component
> > tester).
> >>
> >>
> >> Cheers,
> >>
> >>
> >>
> >> Gareth.
> >>
> >>
> >
> >
> > perhaps obtained from these people
> > http://www.autogarduk.com/stock%20list%2027.htm
> > 41 P and 274 N
> >
> > What are the test parameters of a Peak?
> >
> >
>
> Don't have a clue. It runs on a 9v battery.
>
> It does claim to measure hfe, but again I don't know with which
parameters.
> I don't think its meant to be a precision instrument but I find it very
> useful, mostly for finding dead mosfets and possible good ones, and
> identifying pinouts of bipolars.
>
> I once had terrible problems with a C-audio amp that I just couldn't get
> working. They had loads of BC184 (I think) doing the bias and stuff. I
> replaced the lot with BC184L, not realising that the "L" meant the pinout
> was different. Took me a looong time to suss that one out.
> Now I always double check with the Peak when replacing any signal
> transistor, just in case.
>
> Likewise Farnell once sold me some resistors that were a decade lower than
> marked on the packaging. Again took me a while to suss out the problem,
and
> I now always meter EVERY resistor before soldering it in.
>
> Cheers,
>
> Gareth.
>
>

If mains fuse is designated T3.15 amp, it wil probably need an inrush
fitting sometime in the near future , see thread here last week T-E GP12 SMX
and Studiomaster comparison

Dealt with a heap of C-audio Pulse 2 1100 last year. Stored outdoors (open
sided barn) with the thinking that plastic tarpaulin over the rack with a
pack of silica gel (as found, not activated) inside it in the autumn would
keep them ok over a GB winter.

Except for a few colateral damage burnt out 1/3W R , all the problems were
those TO92 , gone slightly ohmic presumably from damp ingress. Throws out
the bias and then amp always goes into protect.

== 8 of 12 ==
Date: Thurs, Apr 7 2011 6:03 am
From: "Gareth Magennis"

Just realised I've got the old version of the Peak. The new one does more
things than mine, like gate threshold voltage.

http://www.rapidonline.com/Tools-Fasteners-Production-Equipment/Test-Equipment/Analysers-Testers-Counter/Atlas-DCA-Semiconductor-component-analyser/36637/kw/85-2514?source=googleps&utm_source=googleps

Gareth.

== 9 of 12 ==
Date: Thurs, Apr 7 2011 6:11 am
From: "Gareth Magennis"

"N_Cook" <diverse@tcp.co.uk> wrote in message
news:inkci4$p1i$1@dont-email.me...
> Gareth Magennis <sound.service@btconnect.com> wrote in message
> news:ANidnUiZgbJ9GADQnZ2dnUVZ8mCdnZ2d@bt.com...
>>
>> "N_Cook" <diverse@tcp.co.uk> wrote in message
>> news:injqf8$vi8$1@dont-email.me...
>> > Gareth Magennis <sound.service@btconnect.com> wrote in message
>> > news:p-SdnRAdzr627QHQnZ2dnUVZ8oydnZ2d@bt.com...
>> >> Hi,
>> >>
>> >> I have a Trace Elliot 300W bass amp here that uses 2 pairs of
> BUZ901/906
>> >> mosfets. All output devices have been resoldered or replaced at some
>> > point,
>> >> and the amp now contains 2 x BUZ901 (SML) and 2 marked STUD1P.
>> >>
>> >> I've repaired a few of these in my time but never come across this
>> > marking.
>> >> Is it a Trace internal number, or have these been substituted in from
>> >> elsewhere? Are they actually BUZ906?
>> >>
>> >> (One BUZ901 is blown, the other 3 check out OK on a PEAK component
>> > tester).
>> >>
>> >>
>> >> Cheers,
>> >>
>> >>
>> >>
>> >> Gareth.
>> >>
>> >>
>> >
>> >
>> > perhaps obtained from these people
>> > http://www.autogarduk.com/stock%20list%2027.htm
>> > 41 P and 274 N
>> >
>> > What are the test parameters of a Peak?
>> >
>> >
>>
>> Don't have a clue. It runs on a 9v battery.
>>
>> It does claim to measure hfe, but again I don't know with which
> parameters.
>> I don't think its meant to be a precision instrument but I find it very
>> useful, mostly for finding dead mosfets and possible good ones, and
>> identifying pinouts of bipolars.
>>
>> I once had terrible problems with a C-audio amp that I just couldn't get
>> working. They had loads of BC184 (I think) doing the bias and stuff. I
>> replaced the lot with BC184L, not realising that the "L" meant the pinout
>> was different. Took me a looong time to suss that one out.
>> Now I always double check with the Peak when replacing any signal
>> transistor, just in case.
>>
>> Likewise Farnell once sold me some resistors that were a decade lower
>> than
>> marked on the packaging. Again took me a while to suss out the problem,
> and
>> I now always meter EVERY resistor before soldering it in.
>>
>> Cheers,
>>
>> Gareth.
>>
>>
>
> If mains fuse is designated T3.15 amp, it wil probably need an inrush
> fitting sometime in the near future , see thread here last week T-E GP12
> SMX
> and Studiomaster comparison

I contributed to that thread. I'll be sticking a T4 in it instead. ;-)
4 new Mosfets and labour is almost an uneconomical repair as it is.

>
> Dealt with a heap of C-audio Pulse 2 1100 last year. Stored outdoors (open
> sided barn) with the thinking that plastic tarpaulin over the rack with a
> pack of silica gel (as found, not activated) inside it in the autumn would
> keep them ok over a GB winter.
>
> Except for a few colateral damage burnt out 1/3W R , all the problems were
> those TO92 , gone slightly ohmic presumably from damp ingress. Throws out
> the bias and then amp always goes into protect.

I looked inside 2 of these C audio pulse (nothing to do with C audio really)
and quickly put them back together again and gave them straight back. Fist
time I'd ever done anything like that.

Gareth.

== 10 of 12 ==
Date: Thurs, Apr 7 2011 8:26 am
From: "Arfa Daily"

"Phil Allison" <phil_a@tpg.com.au> wrote in message
news:905njjFg5aU1@mid.individual.net...
>
> "Gareth Magennis"
>>
>>>> Doesn't display voltage information, it either says its a "* channel
>>>> mosfet" and identifies the pins,
>>>
>>>
>>> ** IS THE *SOURCE* ON THE FUCKING CASE OR NOT !!!
>>>
>>> You FUCKING MORON !!
>
>>
>> Bye bye.
>
>
> ** FFS - asshole !!
>
> What the FUCKING HELL is wrong with you ????
>
> Is it gonna KILL YOU to post a simple, factual reply ???
>
> The ANSWER to MY question is the ANSWER to YOUR question !!
>
> Did your mom refuse to breast feed you ? ?
>
> Did your dad fuck you up the arse when you were two?? ??
>
>
> JESUS FUCKING CHRIST alive ...............
>
> You gotta be the most RETARDED autistic pommy cunt ALIVE !!
>
>
>
>
>
> ..... Phil
>
>

I thought you told me a couple of weeks ago, that that was me Philip ...
:-)

Arfa

== 11 of 12 ==
Date: Thurs, Apr 7 2011 9:03 am
From: "Ian Field"

"Arfa Daily" <arfa.daily@ntlworld.com> wrote in message
news:WIknp.6238$2o1.4811@newsfe18.ams2...
>
>
> "Phil Allison" <phil_a@tpg.com.au> wrote in message
> news:905njjFg5aU1@mid.individual.net...
>>
>> "Gareth Magennis"
>>>
>>>>> Doesn't display voltage information, it either says its a "* channel
>>>>> mosfet" and identifies the pins,
>>>>
>>>>
>>>> ** IS THE *SOURCE* ON THE FUCKING CASE OR NOT !!!
>>>>
>>>> You FUCKING MORON !!
>>
>>>
>>> Bye bye.
>>
>>
>> ** FFS - asshole !!
>>
>> What the FUCKING HELL is wrong with you ????
>>
>> Is it gonna KILL YOU to post a simple, factual reply ???
>>
>> The ANSWER to MY question is the ANSWER to YOUR question !!
>>
>> Did your mom refuse to breast feed you ? ?
>>
>> Did your dad fuck you up the arse when you were two?? ??
>>
>>
>> JESUS FUCKING CHRIST alive ...............
>>
>> You gotta be the most RETARDED autistic pommy cunt ALIVE !!
>>
>>
>>
>>
>>
>> ..... Phil
>>
>>
>
> I thought you told me a couple of weeks ago, that that was me Philip ...

There's one for every one of his split personalities.

== 12 of 12 ==
Date: Thurs, Apr 7 2011 11:43 am
From: Meat Plow

On Thu, 07 Apr 2011 16:26:44 +0100, Arfa Daily wrote:

> "Phil Allison" <phil_a@tpg.com.au> wrote in message
> news:905njjFg5aU1@mid.individual.net...
>>
>> "Gareth Magennis"
>>>
>>>>> Doesn't display voltage information, it either says its a "* channel
>>>>> mosfet" and identifies the pins,
>>>>
>>>>
>>>> ** IS THE *SOURCE* ON THE FUCKING CASE OR NOT !!!
>>>>
>>>> You FUCKING MORON !!
>>
>>
>>> Bye bye.
>>
>>
>> ** FFS - asshole !!
>>
>> What the FUCKING HELL is wrong with you ????
>>
>> Is it gonna KILL YOU to post a simple, factual reply ???
>>
>> The ANSWER to MY question is the ANSWER to YOUR question !!
>>
>> Did your mom refuse to breast feed you ? ?
>>
>> Did your dad fuck you up the arse when you were two?? ??
>>
>>
>> JESUS FUCKING CHRIST alive ...............
>>
>> You gotta be the most RETARDED autistic pommy cunt ALIVE !!
>>
>>
>>
>>
>>
>> ..... Phil
>>
>>
>>
> I thought you told me a couple of weeks ago, that that was me Philip ...
> :-)
>
> Arfa

It's everyone who isn't Phil "fucking insane" Allison.

--
Live Fast Die Young, Leave A Pretty Corpse

==============================================================================
TOPIC: Black and While programs on Color Tv
http://groups.google.com/group/sci.electronics.repair/t/4832decd7595bba7?hl=en
==============================================================================

== 1 of 3 ==
Date: Thurs, Apr 7 2011 3:53 am
From: "William Sommerwerck"

> We were watching TCM last Sunday when they were running
> fragments (because that's all that remains) of silent B/W movies...

Although about 90% of all silent films have been lost, many exist in full
versions. (Believe it or not, 50% of all sound films are believed to be
lost. Most of these were probably from small studios.)

> some of which were "tinted" with the bluish or brownish look.

It's called "sepia". Tinting was common, used to establish mood. Kodak made
fine-grained release films with a tinted base. Tinting ended with the
introduction of sound.

> They call it 'art'. I call it crap...

It was standard when color was not available. Think about the fact that the
film itself isn't "realistic".

> ...but it was not a burst phase error. If there is no chroma (the
> definition of B/W) the phase wouldn't mean a thing.

This is true in terms of the way NTSC and PAL are designed/defined, but I'm
not sure it's true in practice.

> The OP says all other color is normal (though I have seen some
> TVs that were dreadful when the owner thought it was great), so
> perhaps he found one of these tinted B/W films.

Yes, of course. "Bat Masterson" was printed on sepia stock, "Sea Hunt" was
printed on blue, etc, etc, etc.

== 2 of 3 ==
Date: Thurs, Apr 7 2011 3:58 am
From: "William Sommerwerck"

> That NTSC hue issue was fixed in the '70s and never showed
> up again. I know Hue controls that were never touched
> because it wasn't a problem.

I've owned color TVs since 1974, and I simply don't remember adjusting the
hue control (incorrectly called tint on many sets).

It should be pointed out that a "true" phase error is a differential (that
is, non-minimum) phase error. Readjusting the hue control to get the
fleshtones correct pushes other colors in the wrong direction.

I've noticed over the years that people tend to adjust the hue control for
slightly greenish flesh tones. Don't know why.

== 3 of 3 ==
Date: Thurs, Apr 7 2011 5:16 am
From: "William Sommerwerck"

> It should be pointed out that a "true" phase error is
> a differential (that is, non-minimum) phase error.

Whoops. That should have been non-linear. So easy to get confused...

==============================================================================
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http://groups.google.com/group/sci.electronics.repair/t/e1e132d175c0060e?hl=en
==============================================================================

== 1 of 1 ==
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==============================================================================
TOPIC: Stark 9-66 tube tester repair
http://groups.google.com/group/sci.electronics.repair/t/8bf2519188d6af07?hl=en
==============================================================================

== 1 of 3 ==
Date: Thurs, Apr 7 2011 6:09 am
From: "fabian_hartery@yahoo.ca"

I was wondering if anyone out there has any additional information
with respect to the dynamic mutual transconductance circuitry of the
above mentioned tube tester? For instance, there are three coils in
this circuit that must have a certain number of turns and turns
ratios. This would also allude to using a certain wire gauge.

The information I have found on places like BAMA only discusses the
theory of this design and do not specifically address this unit's
intimate repair. Any help here would be useful whereas this
information seems rather illusive. Thanks in advance.

Fabe
CBS, Newfoundland
fabian_hartery@yahoo.ca

== 2 of 3 ==
Date: Thurs, Apr 7 2011 7:36 am
From: "oidar@nexicom.net"

The Canadian Vintage Radio Society has been running a series of
articles on the Stark 9-66 in their newsletters. They covered
optimization and modifications. The author was Murray Dickerson.

http://www.canadianvintageradio.com/AboutCVRS.htm

Perhaps if you contacted them you could get back issues or an address
to contact Mr. Dickerson.

Ed.

== 3 of 3 ==
Date: Thurs, Apr 7 2011 11:37 am
From: WayneJ

On Thu, 07 Apr 2011 06:09:51 -0700, fabian_hartery@yahoo.ca
<fabian_hartery@yahoo.ca> wrote:

> I was wondering if anyone out there has any additional information
> with respect to the dynamic mutual transconductance circuitry of the
> above mentioned tube tester? For instance, there are three coils in
> this circuit that must have a certain number of turns and turns
> ratios. This would also allude to using a certain wire gauge.
>
> The information I have found on places like BAMA only discusses the
> theory of this design and do not specifically address this unit's
> intimate repair. Any help here would be useful whereas this
> information seems rather illusive. Thanks in advance.
>
> Fabe
> CBS, Newfoundland
> fabian_hartery@yahoo.ca

I believe the Stark 9-66 is based on the Hickok tube tester circuit,
either licensed from Hickok or possibly built for Stark by Hickok. While
the circuit may not be completely identical, repair info for Hickok
designs from the 40's and 50's is more readily available and should be of
great assistance.

WayneJ

==============================================================================
TOPIC: Perfect Universal Abroad Study & Counselling
http://groups.google.com/group/sci.electronics.repair/t/bd71ee84c323542e?hl=en
==============================================================================

== 1 of 1 ==
Date: Thurs, Apr 7 2011 6:45 am
From: mukinda

Please click on the website:www.abroadstudy4all.weebly.com

This website will provide you the favourable information about the
universal abroad study and counselling and the top universities and
colleges, especially situated in Europe and the right path to join for
abroad study. In addition to this, it will also give you the most
important message about GWC for NGO volunteering networking service
based in Kathmandu, Nepal.

==============================================================================
TOPIC: Speaker Crossover Wiring : Solve the Puzzle
http://groups.google.com/group/sci.electronics.repair/t/9ce83c1fb5063b0f?hl=en
==============================================================================

== 1 of 1 ==
Date: Thurs, Apr 7 2011 7:47 am
From: spamtrap1888

On Apr 2, 3:09 am, "Arfa Daily" <arfa.da...@ntlworld.com> wrote:

As to the pots, they could have been for
> level, or phase adjustment. My money would be on level, in which case only
> two legs being in use - i.e. with the pots connected as variable resistors,
> one in series with the two tweeters in parallel, and one with the two mids
> in parallel - would be the expected configuration.

In speaker crossovers, L-pads are generally used as L-pads -- just a
suggestion. Speaker manufacturers are extremely cost-conscious and
won't overspend -- especially on something that doesn't show.

>
> If you put "passive three way crossover designs" into Google, you will get
> an information overload on them, that you might be able to pick the bones
> out of to decide on what your design originally was or needs to be.

Try back issues of Speaker Builder or the Audio Amateur for
information on crossover design. Also Siegfried Linkwitz's site.

==============================================================================
TOPIC: Toshiba TV won't turn on after power outage
http://groups.google.com/group/sci.electronics.repair/t/924e0474b11afca2?hl=en
==============================================================================

== 1 of 1 ==
Date: Thurs, Apr 7 2011 7:58 am
From: "hrhofmann@att.net"

On Apr 6, 11:22 pm, Sylvia Else <syl...@not.here.invalid> wrote:
> On 7/04/2011 12:39 PM, spamtrap1888 wrote:
>
> > The weather was beautiful all day -- just the typical Pacific Gas and
> > Electric service interruption, so it's hard to figure how it could
> > have been zapped with a surge. Something squeals when the set is
> > plugged into the power strip, but that's the only response.
>
> > Any ideas where to start?
>
> > Is there likely to be a reset button or blown fuse? It's a Toshiba
> > 27AF43, if that's any help.
>
> Can't help regarding repairing it, but you could try to find out from
> Pacific Gas and Electric why the interruption occurred. Surges don't
> necessarily come from lightening. For example having a high voltage
> cable break and land on a lower voltage cable could cause one.
>
> Whether you'd have any redress against the power company if it turns out
> there was a surge would depend on your jurisdiction.
>
> Sylvia.

Surges can't come from LIGHTENING, that's what happened to Michael
Jackson's face. Surges can come from LIGHTNING.

==============================================================================
TOPIC: http://123maza.com/35/sample123/
http://groups.google.com/group/sci.electronics.repair/t/192d3019f2d417ce?hl=en
==============================================================================

== 1 of 1 ==
Date: Thurs, Apr 7 2011 9:06 am
From: sweety s

free recived to electronics.

==============================================================================
TOPIC: Yamaha T-2 Tuner
http://groups.google.com/group/sci.electronics.repair/t/949aa85a22197096?hl=en
==============================================================================

== 1 of 1 ==
Date: Thurs, Apr 7 2011 9:58 am
From: Tim Schwartz

Hello all,

I've got a Yamaha T2 tuner here with a bad trimmer cap in the front
end. There are several of them in the front end. The scan of the
service manual that I have does not show the value of them, or the
Yamaha part number. I could take a guess at a 5-20pf range, but would
prefer to know for sure. Anyone an authorized servicer with info in
your database?

Many thanks,
Tim
Bristol Electronics

==============================================================================
TOPIC: Composite video from Compaq Armada e500 to Panasonic LCD TV TC-20LA1.
http://groups.google.com/group/sci.electronics.repair/t/bf86e0e27f847377?hl=en
==============================================================================

== 1 of 1 ==
Date: Thurs, Apr 7 2011 10:42 am
From: Peter

Folk,

This is an arcane question of application rather than repair but I
don't know of a better place to ask.

I've connected the composite video output from a Compaq Armada e500
running Debian Squeeze, to a Panasonic LCD TV TC-20LA1. The display
on the TV works for the COMPAQ logo, the BIOS, and the console
startup messages. When X takes over, the TV appears to lose sync.
Nothing helpful is evident in the BIOS of the Armada.

The Armada was donated without the original software. I'll guess
that there was software designed to drive the composite video output,
independently of the laptop screen.

I'm thinking of trying this in /etc/X11/xorg.conf.
Section "Monitor"
...
VertRefresh 60.0
EndSection

Can a setting in xorg.conf harm the laptop hardware? Any advice or
comments or instructions to get a display on the TV suitable for
watching a movie?

Thanks, ... Peter E.

==============================================================================

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