sci.electronics.repair@googlegroups.com

Today's topics:

* SMPS design ... - 1 messages, 1 author
http://groups.google.com/group/sci.electronics.repair/t/fafbacc4bb94c7c0?hl=en
* Re-winding solenoids. - 2 messages, 2 authors
http://groups.google.com/group/sci.electronics.repair/t/fd7d7813745e3da8?hl=en
* UK source of these .6mm "Dremmel" thick cut off discs - 12 messages, 7
authors
http://groups.google.com/group/sci.electronics.repair/t/29e74f47d8c32740?hl=en
* Sony DSC-P3 has Error Code 61;00 - 3 messages, 2 authors
http://groups.google.com/group/sci.electronics.repair/t/59d8a0c9abbbf9c7?hl=en

==============================================================================
TOPIC: SMPS design ...
http://groups.google.com/group/sci.electronics.repair/t/fafbacc4bb94c7c0?hl=en
==============================================================================

== 1 of 1 ==
Date: Sat, Oct 22 2011 10:14 pm
From: josephkk

On Sat, 22 Oct 2011 13:25:36 +0100, "Ian Field"
<gangprobing.alien@ntlworld.com> wrote:

>
>"Phil Allison" <phil_a@tpg.com.au> wrote in message
>news:9geii5F9l4U1@mid.individual.net...
>>
>> "Arfa Daily"
>>
>>
>> ** Get utterly fucked
>>
>> - you stupid, bullshitting, pommy TROLL
>
>
>Missing your dingo mommy & daddy?
>

They disowned him for gloriously obvious reasons.

>=P

==============================================================================
TOPIC: Re-winding solenoids.
http://groups.google.com/group/sci.electronics.repair/t/fd7d7813745e3da8?hl=en
==============================================================================

== 1 of 2 ==
Date: Sun, Oct 23 2011 1:36 am
From: Jeffrey Angus

On 10/22/2011 11:55 PM, josephkk wrote:
>> >
>> >The original bridge was dealing with 480 vac @ 5.2 amps. The new
>> >coil will present a load of about 4 amps @ 240 vac. It's not an
>> >issue.
> That does not make sense for the ampere-turns argument. The number of
> turns drops dramatically thus the current must increase accordingly.
>

480v coil 2500 turns @ 4.8 amps
240 coil 2000 turns @ 6.0 amps

Jeff-1.0

--
"Everything from Crackers to Coffins"

== 2 of 2 ==
Date: Sun, Oct 23 2011 7:59 am
From: josephkk

On Sun, 23 Oct 2011 03:36:07 -0500, Jeffrey Angus <grendelair@aim.com>
wrote:

>On 10/22/2011 11:55 PM, josephkk wrote:
>>> >
>>> >The original bridge was dealing with 480 vac @ 5.2 amps. The new
>>> >coil will present a load of about 4 amps @ 240 vac. It's not an
>>> >issue.
>> That does not make sense for the ampere-turns argument. The number of
>> turns drops dramatically thus the current must increase accordingly.
>>
>
>480v coil 2500 turns @ 4.8 amps
>240 coil 2000 turns @ 6.0 amps
>
>Jeff-1.0

Not as bad of a turns drop as thought. The new numbers make sense.

?-)

==============================================================================
TOPIC: UK source of these .6mm "Dremmel" thick cut off discs
http://groups.google.com/group/sci.electronics.repair/t/29e74f47d8c32740?hl=en
==============================================================================

== 1 of 12 ==
Date: Sun, Oct 23 2011 7:37 am
From: "N_Cook"

Tube Packaged Black and Decker RT1018 36 piece 15/16 inch Emery Cutoff
Wheels. These are very similar to Dremel 409 cut-off wheels. Use with 1/16
inch Screw Mandrel which is not included. 0.025 inch thick. Use with Dremel
rotary tools. Made in USA.
http://www.widgetsupply.com/page/WS/PROD/dremel-cut-off-emery-wheel/XST5-RT1
018

In-Excess had them for 0.80 GBP per tub but I did not buy enough tubs when
they were in stock. Or a similar product say 20 to 36 in a tub, not the
expensive half dozen and a mandrel which are commonly available in model
shops. To cut the steel of an equipment case for a larger pannel switch, or
whatever, takes 3 or 4 of them for one job.

== 2 of 12 ==
Date: Sun, Oct 23 2011 7:55 am
From: "Michael A. Terrell"

N_Cook wrote:
>
> Tube Packaged Black and Decker RT1018 36 piece 15/16 inch Emery Cutoff
> Wheels. These are very similar to Dremel 409 cut-off wheels. Use with 1/16
> inch Screw Mandrel which is not included. 0.025 inch thick. Use with Dremel
> rotary tools. Made in USA.
> http://www.widgetsupply.com/page/WS/PROD/dremel-cut-off-emery-wheel/XST5-RT1
> 018
>
> In-Excess had them for 0.80 GBP per tub but I did not buy enough tubs when
> they were in stock. Or a similar product say 20 to 36 in a tub, not the
> expensive half dozen and a mandrel which are commonly available in model
> shops. To cut the steel of an equipment case for a larger pannel switch, or
> whatever, takes 3 or 4 of them for one job.

You're using the wrong tool, as usual.

--
You can't have a sense of humor, if you have no sense.

== 3 of 12 ==
Date: Sun, Oct 23 2011 7:58 am
From: Ron

On 23/10/2011 15:37, N_Cook wrote:
> Tube Packaged Black and Decker RT1018 36 piece 15/16 inch Emery Cutoff
> Wheels. These are very similar to Dremel 409 cut-off wheels. Use with 1/16
> inch Screw Mandrel which is not included. 0.025 inch thick. Use with Dremel
> rotary tools. Made in USA.
> http://www.widgetsupply.com/page/WS/PROD/dremel-cut-off-emery-wheel/XST5-RT1
> 018
>
> In-Excess had them for 0.80 GBP per tub but I did not buy enough tubs when
> they were in stock. Or a similar product say 20 to 36 in a tub, not the
> expensive half dozen and a mandrel which are commonly available in model
> shops. To cut the steel of an equipment case for a larger pannel switch, or
> whatever, takes 3 or 4 of them for one job.
>
>
>
wrong tool for the job...

== 4 of 12 ==
Date: Sun, Oct 23 2011 8:00 am
From: "N_Cook"

Michael A. Terrell <mike.terrell@earthlink.net> wrote in message
news:ZMidnVBoi9VmtznTnZ2dnUVZ_gudnZ2d@earthlink.com...
>
> N_Cook wrote:
> >
> > Tube Packaged Black and Decker RT1018 36 piece 15/16 inch Emery Cutoff
> > Wheels. These are very similar to Dremel 409 cut-off wheels. Use with
1/16
> > inch Screw Mandrel which is not included. 0.025 inch thick. Use with
Dremel
> > rotary tools. Made in USA.
> >
http://www.widgetsupply.com/page/WS/PROD/dremel-cut-off-emery-wheel/XST5-RT1
> > 018
> >
> > In-Excess had them for 0.80 GBP per tub but I did not buy enough tubs
when
> > they were in stock. Or a similar product say 20 to 36 in a tub, not the
> > expensive half dozen and a mandrel which are commonly available in model
> > shops. To cut the steel of an equipment case for a larger pannel switch,
or
> > whatever, takes 3 or 4 of them for one job.
>
>
> You're using the wrong tool, as usual.
>
>
> --
> You can't have a sense of humor, if you have no sense.

I don't own a nibbler, which of course is a one-job-type tool anyway, so
hard to justify for 5 times a year use

== 5 of 12 ==
Date: Sun, Oct 23 2011 10:14 am
From: "N_Cook"

Ron <ron@lunevalleyaudio.com> wrote in message
news:A_KdnWQrBIU3tjnTnZ2dnUVZ7qydnZ2d@bt.com...
> On 23/10/2011 15:37, N_Cook wrote:
> > Tube Packaged Black and Decker RT1018 36 piece 15/16 inch Emery Cutoff
> > Wheels. These are very similar to Dremel 409 cut-off wheels. Use with
1/16
> > inch Screw Mandrel which is not included. 0.025 inch thick. Use with
Dremel
> > rotary tools. Made in USA.
> >
http://www.widgetsupply.com/page/WS/PROD/dremel-cut-off-emery-wheel/XST5-RT1
> > 018
> >
> > In-Excess had them for 0.80 GBP per tub but I did not buy enough tubs
when
> > they were in stock. Or a similar product say 20 to 36 in a tub, not the
> > expensive half dozen and a mandrel which are commonly available in model
> > shops. To cut the steel of an equipment case for a larger pannel switch,
or
> > whatever, takes 3 or 4 of them for one job.
> >
> >
> >
> wrong tool for the job...

Such a job a couple of months back with 2mm thick steel. It would take a
windy nibbler to attack that panel in place populated with everything else
around it - colateral damage from the vibration ?. An hour job each side ,
to clear the panel and then to mill out , alternatively, so a Dremmel and 4
discs expended is very much the tool of choice there.

== 6 of 12 ==
Date: Sun, Oct 23 2011 11:13 am
From: Jeff Layman

On 23/10/2011 15:37, N_Cook wrote:
> Tube Packaged Black and Decker RT1018 36 piece 15/16 inch Emery Cutoff
> Wheels. These are very similar to Dremel 409 cut-off wheels. Use with 1/16
> inch Screw Mandrel which is not included. 0.025 inch thick. Use with Dremel
> rotary tools. Made in USA.
> http://www.widgetsupply.com/page/WS/PROD/dremel-cut-off-emery-wheel/XST5-RT1
> 018
>
> In-Excess had them for 0.80 GBP per tub but I did not buy enough tubs when
> they were in stock. Or a similar product say 20 to 36 in a tub, not the
> expensive half dozen and a mandrel which are commonly available in model
> shops. To cut the steel of an equipment case for a larger pannel switch, or
> whatever, takes 3 or 4 of them for one job.
>
Complete set of various wheels, polishers, sanders, etc here:
http://www.chronos.ltd.uk/acatalog/105-pc-General-Purpose-Set.html

But you might want to consider spending a few quid on a tungsten carbide
cutting wheel. See here (watch the wrap!):
http://www.easycomposites.co.uk/products/perma-grit/19mm-and-32mm-rotary-discs-with-arbor.aspx

--

Jeff

== 7 of 12 ==
Date: Sun, Oct 23 2011 11:23 am
From: "Michael A. Terrell"

N_Cook wrote:
>
> Michael A. Terrell <mike.terrell@earthlink.net> wrote in message
> news:ZMidnVBoi9VmtznTnZ2dnUVZ_gudnZ2d@earthlink.com...
> >
> > N_Cook wrote:
> > >
> > > Tube Packaged Black and Decker RT1018 36 piece 15/16 inch Emery Cutoff
> > > Wheels. These are very similar to Dremel 409 cut-off wheels. Use with
> 1/16
> > > inch Screw Mandrel which is not included. 0.025 inch thick. Use with
> Dremel
> > > rotary tools. Made in USA.
> > >
> http://www.widgetsupply.com/page/WS/PROD/dremel-cut-off-emery-wheel/XST5-RT1
> > > 018
> > >
> > > In-Excess had them for 0.80 GBP per tub but I did not buy enough tubs
> when
> > > they were in stock. Or a similar product say 20 to 36 in a tub, not the
> > > expensive half dozen and a mandrel which are commonly available in model
> > > shops. To cut the steel of an equipment case for a larger pannel switch,
> or
> > > whatever, takes 3 or 4 of them for one job.
> >
> > You're using the wrong tool, as usual.
>
> I don't own a nibbler, which of course is a one-job-type tool anyway, so
> hard to justify for 5 times a year use

But you can justify wasting all those cutting disks, the metal dust
and rough cut holes? I've worn out four nibblers over the last 40
years. I currently own two hand nibblers, and an air powered nibbler.
They work fast and cut very neat holes if you know how to use them, but
you'd rather screw up every thing you touch.

--
You can't have a sense of humor, if you have no sense.

== 8 of 12 ==
Date: Sun, Oct 23 2011 12:17 pm
From: "N_Cook"

Jeff Layman <JMLayman@invalid.invalid> wrote in message
news:j81lfl$n7l$1@news.albasani.net...
> On 23/10/2011 15:37, N_Cook wrote:
> > Tube Packaged Black and Decker RT1018 36 piece 15/16 inch Emery Cutoff
> > Wheels. These are very similar to Dremel 409 cut-off wheels. Use with
1/16
> > inch Screw Mandrel which is not included. 0.025 inch thick. Use with
Dremel
> > rotary tools. Made in USA.
> >
http://www.widgetsupply.com/page/WS/PROD/dremel-cut-off-emery-wheel/XST5-RT1
> > 018
> >
> > In-Excess had them for 0.80 GBP per tub but I did not buy enough tubs
when
> > they were in stock. Or a similar product say 20 to 36 in a tub, not the
> > expensive half dozen and a mandrel which are commonly available in model
> > shops. To cut the steel of an equipment case for a larger pannel switch,
or
> > whatever, takes 3 or 4 of them for one job.
> >
> Complete set of various wheels, polishers, sanders, etc here:
> http://www.chronos.ltd.uk/acatalog/105-pc-General-Purpose-Set.html
>
> But you might want to consider spending a few quid on a tungsten carbide
> cutting wheel. See here (watch the wrap!):
>
http://www.easycomposites.co.uk/products/perma-grit/19mm-and-32mm-rotary-dis
cs-with-arbor.aspx
>
> --
>
> Jeff

Other than sub-mm drill bits in my Dremel its really only the parting off
discs I use . I do own a diamond-dust edge and faced disc but have never
used it, leaving it for some job that requires .3mm cut that so far I've
never come across a requirement for. Its far too easy to snag such discs
with hand held apparatus, but snap a .6mm grinding disc is an
inconsequential loss.

== 9 of 12 ==
Date: Sun, Oct 23 2011 12:48 pm
From: "William Sommerwerck"

> Other than sub-mm drill bits in my Dremel its really only the parting off
> discs I use . I do own a diamond-dust edge and faced disc but have never
> used it, leaving it for some job that requires .3mm cut that so far I've
> never come across a requirement for. Its far too easy to snag such discs
> with hand held apparatus, but snap a .6mm grinding disc is an
> inconsequential loss.

This is meant sincerely.

Your writing is improving. Keep at it.

== 10 of 12 ==
Date: Sun, Oct 23 2011 1:21 pm
From: Baron

Jeff Layman Inscribed thus:

> On 23/10/2011 15:37, N_Cook wrote:
>> Tube Packaged Black and Decker RT1018 36 piece 15/16 inch Emery
>> Cutoff Wheels. These are very similar to Dremel 409 cut-off wheels.
>> Use with 1/16 inch Screw Mandrel which is not included. 0.025 inch
>> thick. Use with Dremel rotary tools. Made in USA.
>>
http://www.widgetsupply.com/page/WS/PROD/dremel-cut-off-emery-wheel/XST5-RT1
>> 018
>>
>> In-Excess had them for 0.80 GBP per tub but I did not buy enough tubs
>> when they were in stock. Or a similar product say 20 to 36 in a tub,
>> not the expensive half dozen and a mandrel which are commonly
>> available in model shops. To cut the steel of an equipment case for a
>> larger pannel switch, or whatever, takes 3 or 4 of them for one job.
>>
> Complete set of various wheels, polishers, sanders, etc here:
> http://www.chronos.ltd.uk/acatalog/105-pc-General-Purpose-Set.html
>
> But you might want to consider spending a few quid on a tungsten
> carbide
> cutting wheel. See here (watch the wrap!):
>
http://www.easycomposites.co.uk/products/perma-grit/19mm-and-32mm-rotary-discs-with-arbor.aspx
>

£2.79 in "Boyes" shops !

I just bought one 50mm dia with mandrel.
--
Best Regards:
Baron.

== 11 of 12 ==
Date: Sun, Oct 23 2011 2:57 pm
From: news@jecarter.us

On Sun, 23 Oct 2011 15:37:04 +0100, "N_Cook" <diverse@tcp.co.uk>
wrote:

>Tube Packaged Black and Decker RT1018 36 piece 15/16 inch Emery Cutoff
>Wheels. These are very similar to Dremel 409 cut-off wheels. Use with 1/16
>inch Screw Mandrel which is not included. 0.025 inch thick. Use with Dremel
>rotary tools. Made in USA.
>http://www.widgetsupply.com/page/WS/PROD/dremel-cut-off-emery-wheel/XST5-RT1
>018
>
>In-Excess had them for 0.80 GBP per tub but I did not buy enough tubs when
>they were in stock. Or a similar product say 20 to 36 in a tub, not the
>expensive half dozen and a mandrel which are commonly available in model
>shops. To cut the steel of an equipment case for a larger pannel switch, or
>whatever, takes 3 or 4 of them for one job.
>
>

That sounds like a job for an oscillating saw (Fein, Festool,
Craftsman, Harbor Freight, etc). Just buy good blades - the Harbor
Freight blades are OK on wood but their metal-cutting blades are wimpy
at best.

John

== 12 of 12 ==
Date: Mon, Oct 24 2011 12:28 am
From: "N_Cook"

<news@jecarter.us> wrote in message
news:da39a71kqnd3i09dvaf8fd0fqobdu2gk4k@4ax.com...
> On Sun, 23 Oct 2011 15:37:04 +0100, "N_Cook" <diverse@tcp.co.uk>
> wrote:
>
> >Tube Packaged Black and Decker RT1018 36 piece 15/16 inch Emery Cutoff
> >Wheels. These are very similar to Dremel 409 cut-off wheels. Use with
1/16
> >inch Screw Mandrel which is not included. 0.025 inch thick. Use with
Dremel
> >rotary tools. Made in USA.
>
>http://www.widgetsupply.com/page/WS/PROD/dremel-cut-off-emery-wheel/XST5-RT
1
> >018
> >
> >In-Excess had them for 0.80 GBP per tub but I did not buy enough tubs
when
> >they were in stock. Or a similar product say 20 to 36 in a tub, not the
> >expensive half dozen and a mandrel which are commonly available in model
> >shops. To cut the steel of an equipment case for a larger pannel switch,
or
> >whatever, takes 3 or 4 of them for one job.
> >
> >
>
> That sounds like a job for an oscillating saw (Fein, Festool,
> Craftsman, Harbor Freight, etc). Just buy good blades - the Harbor
> Freight blades are OK on wood but their metal-cutting blades are wimpy
> at best.
>
> John

Its a long time since I used one but I seem to remember they require too
large an operational footprint for this sort of use on "populated" cases -
say an audio mixer panel with nearly all available space occupied by
something. And then chance of colateral damage from vibration ? .
Parting-off discs cause no vibration , they also give a clean safe cut edge
with just a little break out "swarf" that a chamfering run with the disc
soon rids.

==============================================================================
TOPIC: Sony DSC-P3 has Error Code 61;00
http://groups.google.com/group/sci.electronics.repair/t/59d8a0c9abbbf9c7?hl=en
==============================================================================

== 1 of 3 ==
Date: Sun, Oct 23 2011 4:33 pm
From: "hrhofmann@att.net"

I have a 2002 Sony DSC-P3 camera that takes fantastic pictures, until
today.

It had been unused for abut a month, and I plugged in the power supply
to top the battery off before going out to a granddaughters recital to
take some photos. With the power supply still connected, the camera
was very slow to come one, and when it did finally come on, it beeped
and the flashing display was "E:61:00 MEMORY STICK ERROR", with a
symbol of a memory stick also flashing. I unplugged the power supply
and restarted it. Same exact symptoms.
The battery indicator shows an almost full battery, and the memory
stick is empty.

The only thing I can think of is that it somehow got screwed up when I
last downloaded the camera pictures to my computer. But I have done
that hundreds of times with no problems.

The owners manual says if there is an eror code beginning with E, the
camera must go back to an authorized Sony dealer for service. I
really would like to figure out what the authorized dealer can do that
I couldn't do, if I knew the problem. This camera was a gift in 2002
from some very good friends in Tokyo and I would really like to be
able to continue to use it for a few more years. It has accompanied
me on climbs to most of the 14,000 + foot peaks in Colorado and
performed flawlessly in cold and high altitude, and now it dies just
sitting in my bedroom.

All suggestions for what to do will be taken seriously.

TIA,

Bob Hofmann

== 2 of 3 ==
Date: Sun, Oct 23 2011 6:08 pm
From: "William Sommerwerck"

The last time you transferred pictures to your computer... Did you properly
eject the memory stick before removing it? If not, you could have damaged
the stick.

== 3 of 3 ==
Date: Sun, Oct 23 2011 8:34 pm
From: "hrhofmann@att.net"

On Oct 23, 8:08 pm, "William Sommerwerck" <grizzledgee...@comcast.net>
wrote:
> The last time you transferred pictures to your computer... Did you properly
> eject the memory stick before removing it? If not, you could have damaged
> the stick.

I transferred using the USB connector on the camera to download to the
computer.

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