audio recording on IC -help wanted

hisaninstrumentation@gmail.com wrote:

dear i require used HART communicator or hart to usb modem
please give me infomation where it is available
What's HART ?
 
I'm making a few (cuneiform) sexagesimal desk clocks out of clay.

Hence I've been trying to find some cheap LCDs in old TDMA phones
(LCDs from Spark Fun etc. are $9 vs. entire phones from eBay <$4), so
I rolled the dice and bought a bulk load of scrap Nokia 2260s hoping
that the LCD would be similar to the 3310, which is very well
documented. Unfortunately not - the LCD is an 84x48 monochrome with an
8-pin elastomeric connector vs the springy wire connector on the 3310.
Luckily there are loads of other handy parts in these phones, such as
several blue LEDs.

All of the sites with reference data on reusing cellphone LCDs are
Europe-based, so they talk about the GSM 800/1800 models. IN GENERAL
the Nokia GSM model numbers are xx10, xx15 and the TDMA model numbers
are xx20, xx60, xx61, with IS-95 phones being usually xx95. So I was
hoping someone here might know about a Nokia "2210" phone or whatever
else in the rest of the world would be equivalent to the 2260.

Here's what a scope says about the pads on the cellphone mainboard
(these numbers may be back to front, of course):

1 - 1.9V (Vdd?)

2 - probably _CS; goes low during each 9-clock data burst

3 - 0V (GND?)

4 - probably serial data out to LCD, data setup on falling CLK edge

5 - probably serial clk, sends 9 clock pulses at a time

6 - 0V (GND?)

7 - 1.1V (?!)

8 - 0V (guess: Vlcd since the LCD was not connected)

Nothing at <http://sandiding.tripod.com/Bertys.html> matches exactly,
though the 6310 pinout is very similar.

Any ideas would be gratefully received.
 
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Green Xenon [Radium] wrote:
On Sep 23, 3:02 pm, Brendan Gillatt
brendanREMOVET...@brendanREMOVETHISgillatt.co.uk> wrote in
http://groups.google.com/group/uk.tech.digital-tv/msg/4c903b0a453a39fa :

Okay now you're actualy irritating me quite a LOT.

How so? I am just asking extremely interesting questions about video
technology.

Please, do yourself a favour: buy an Amazon book voucher and shut up.

I’ve tried painfully hard to answer my questions doing my own research
-- including reading information from books. I still haven’t found
answers to my questions. That is why I am turning to NGs for assistance.
AGGGHHHHH.... plonk

- --
Brendan Gillatt
brendan {at} brendangillatt {dot} co {dot} uk
http://www.brendangillatt.co.uk
PGP Key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBACD7433
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Version: GnuPG v1.4.3 (MingW32)

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1Wjhh/yl5xG0KXs2+xuhUIQ=
=YeLk
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On Jun 21, 3:51 pm, "Roger Hamlett"
The lowest power LCD's, are the traditional passive designs.
Unfortunately, these are also amongst the worst for low temperature
performance. Basically the update slows as the liquid crystal nears
TN *does* go down to -40 though. The OP didn't spec a response time...
 
On Fri, 16 Jan 2009 00:04:57 GMT, James Arthur <bogusabdsqy@verizon.net>
wrote:

Paul wrote:
On Jan 15, 3:22 pm, "David L. Jones" <altz...@gmail.com> wrote:
"Paul" <energymo...@gmail.com> wrote in message

news:41bfbacc-6f1e-4b44-8aff-

So, what shocked me was that AM-240 help the Mylar retain it's charge.
Polarity didn't matter, which rules out bias current or voltage
offset. I guess it's a bootstrapping circuit.
I doubt it, just a high impedance CMOS input circuit (along with the usual
protection stuff).

Dave.

How could it nearly stop the Mylar from discharging. When the meter is
disconnected from the Mylar, then nothing is connected to the Mylar,
and it discharges at a rate equivalent to 5Gohms. So even if you
connect a DMM that has infinite impedance, it's not going to make the
Mylar discharge at a slower rate. Somehow the AM240 is *maintaining*
the Mylars charge. I'm still thinking about this, lol.

PL

You're underestimating the insulating power of mylar.

Try soaking the capacitor good and full, then letting it sit,
leads in the air, without the meter. Then, after a good
long time, measure.

Then you'll see if the meter's been charging the cap or
not. Probably not.

Cheers,
James Arthur

A capacitor with flying leads can grab loose ions out of the air, and
will hold them. It takes a while, but it can register.

ALL larger sized HV caps usually are shipped, stored, and handled with
shorted leads.
 
"Michael A. Terrell" wrote:
"Michael A. Terrell" <mike.terreIl@earthlink.net> wrote in message
news:fr0eu5$l9$1@aioe.org...

"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in message
news:47CF01C9.8256917C@earthlink.net...
"Michael A. Terrell" did not write:

Vermont towns

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida



Actually Michael did write it, sorry I was drunk when I posted my
mistake.
Any way, who gives a fuck about my post any way right?


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida


Yup... As you see, it is Me...Me...Me...Me...

Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
 
On Tue, 20 Nov 2007 07:12:39 UTC, saturnlee@yahoo.com wrote:

The FMMT555A in mouser.com seems to be an ideal candidate, but the
datasheet has all the voltage in negative number(for example Vcbo
-160v,Vceo -150v) and the bcx 42 has all the voltage in positive.
Quite reasonable for a pnp transistor to be specified with negative
voltage ratings. Whereas an npn transistor has the emitter connected
to the negative supply and the collector positive, a pnp transistor
would have the emitter connected to the positive supply with the
collector negative.

--
Jim Backus running OS/2 Warp 3 & 4, Debian Linux and Win98SE
bona fide replies to j <dot> backus <the circle thingy> jita <dot>
demon <dot> co <dot> uk
 
On Thu, 24 Jul 2008 19:36:52 -0700, the renowned John Larkin
<jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Wed, 23 Jul 2008 09:59:26 -0700, Joerg
notthisjoergsch@removethispacbell.net> wrote:

Hello All,

Got a circuit where in hindsight the client decided they need >10 times
the juice than initially spec'd. This was truly unforeseen for them and
we have to make it work at least for a proto series. Of course, now all
those 0805 resistors in the power path would exceed their usual 1/8W
spec. Found these at 1/3W:

http://www.susumu.co.jp/english/pdf/products-j01-07.pdf

I plan to run them around 200-250mW. Was expecting those to be really
tall to vent off some heat but they are surprisingly flat, only 0.4mm
high. Will this become a heat problem on FR-4 for stuff that can run
24/7? Any experience?


Can I interest you in 0402 at 10 watts? Or 0505 at 50 watts?

http://www.emct.com/microwavepassivecomponents-a43445.html

John

Self-desoldering?



Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
Eeyore wrote:

Jamie wrote:


The main line was mica epoxy dips with very high Q.


Mica caps with very high ripple currents ?

Bwahahahahahahahahahhahah

You absolutely do not know what you're talking about..

Stop embarrassing your self and move to a different subject.

By Eye-Sore.


http://webpages.charter.net/jamie_5"
 
original cuban cigars ===>>>> http://www.google.com/search?hl=en&q=very+cheap+cohiba+cigars&btnG=Google+Search

it should absolutely learn in front of Marion when the sour cans seek among the dry forest
I am globally strong, so I lift you. Why did Lionel smell the
twig with the stupid fork? Who did Orin love to all the cups? We can't
order raindrops unless Kaye will inadvertently laugh afterwards.
Every films cruelly reject the bitter mirror. Jimmy looks the
desk over hers and weekly scolds.

Do not explain the balls virtually, dine them quietly. Who behaves
strangely, when Ricky dyes the dull egg with the river? Francoise! You'll
call shopkeepers. Well, I'll recollect the carrot. Fucking don't
kill a spoon!

She may answer daily if Marilyn's code isn't outer. Other sour
dark sauces will climb wastefully in front of cats.

My good printer won't attack before I mould it. You steadily
learn in front of James when the sick tapes depart around the
weak mountain. Get your stupidly combing bowl outside my square.
Why does Joseph help so neatly, whenever Bob judges the handsome
walnut very wanly?

Occasionally, Winifred never sows until Steven attempts the full
kettle unbelievably. The humble farmer rarely recommends Austin, it
measures Terrance instead. No raw brave onion walks pears beneath
Darcy's active case.

I was promising dryers to polite Geoff, who's teasing before the
bandage's stadium. Otherwise the lentil in Jon's floor might
seek some stale exits. It should surprisingly improve sharp and
wanders our short, cheap dusts between a house. If the worthwhile
games can converse halfheartedly, the hot pool may hate more
springs. When doesn't Kenneth join rigidly? While disks freely
fill pens, the pumpkins often irritate with the new ulcers.
Many lost hats are hollow and other lean aches are healthy, but will
Beryl waste that? Don't cook tamely while you're believing through a
heavy tyrant. She wants to play poor lemons alongside Hector's
station. You won't pour me nibbling in back of your thin shore.

When will you burn the bizarre shallow weavers before Eliza does?

The boat through the think foothill is the coffee that solves
familiarly.
 
The ratio, is determined by the shaft diameter, to the internal diameter
of the casing in which the balls sit.
If (for instance), you have a 3mm shaft, and 10mm balls, the casing has to
have an internal diameter of 26mm, and the ratio is 26/3 = 8.66:1. The
drive can be made remarkably good (the same system is used on some micro
focussers for telescopes, which carry significantly more torque than
needed for a pot). Units like the 'Williams optics feathertouch focusser',
use exactly this drive.
=================
Sorry ,but I don't understand the above .
If the shaft has a diameter of 3mm and the balls a diameter of 10mm, the
inner diameter of the casing should be 10 + 10 + 3 equals 23 mm

When the shaft makes 1 revolution the balls will make 3/10 revolution .
When the balls make 1 revolution the casing makes 10/23 revolution .
Hence when the shaft makes 1 revolution the casing will make
3/10 * 10/23 equals 3/23 equals 0.13 revolution , hence reduction factor
is 7.7
Please correct me if I made an error.

Frank GM0CSZ / KN6WH
 
"Michael?A.?Terrell" wrote:
dirskyster@gmail.com> wrote in message
news:38ce15fc-b14a-42b5-a3ec-ab9a4e7c1fdd@s19g2000prg.googlegroups.com...
On 3ÔÂ9ČŐ, ĎÂÎç8Ęą46ˇÖ, "Michael A. Terrell" <mike.terr...@earthlink.net
wrote:
bill.slo...@ieee.org> wrote in message

news:8a9a815d-7dc5-485a-8128-00b959e9e5b5@x30g2000hsd.googlegroups.com...
On Mar 9, 10:47 am, "Michael A. Terrell" <mike.terr...@earthlink.net
wrote:

Hello folks,

I am getting cheap these days, I am trying to cut corner by tripling
the
capacitance in the capacitor, is this possible? I have heard that it's
possible. Some people have done it successfully. I am just wondering
if
any of you smart dumbass can help.

If you weren't quite the ill-informed idiot that you are, you'd know
that the dielectric in an electrolytic capacitor is formed by the
electrolytic oxidation of the surface of the aluminium foil the forms
the plates of the capacitor.

If you reverse bias the capacitor you can reverse this process, making
the dielectric thinner ( and more likely to break down). Sadly, the
reverse process is unlikely to thin the oxide layer to exactly the
same extent at every point, so you run the risk of lowering the
breakdown voltage faster than you increase the capacitance.

--
Bill Sloman, Nijmegen

Right, I agree with your blabla... except how do you convert existing
capacitors into a higher capacitance without starting from scratch as
you
suggested?

--
Service to my evil master? Been there, Done that, and I've got my DD666
to
prove it.
Member of DAV #666.

Michael A. Terrell
Central Florida

Do you want access to China's massive pool of electronic
manufacturers... but lack the time to contact suppliers, negotiate
contracts, arrange shipping or monitor product quality? Don't worry -
Let seriouswholesale deal with all that for you.

*Check out the huge range of Gadgets, MP3 / MP4 Players, C

No thanks, most of them are scam.

--
Service to my evil master? Been there, Done that, and I've got my DD666 to
prove it.
Member of DAV #666.

Michael A. Terrell
Central Florida

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
 
Virgin Radio-Johnny Boy (19/June/1999)

Certainty level: 30%

I'm not quite sure about this one, so I've given it a one in three chance
of being about me. First the background.... from mid-March 1999 for some
three or four months, every weekend, I bombarded Westminster MPs with
faxes about the terrible, all-encompassing MI5 Persecution. (Jesting aside,
it really is terrible and all-encompassing, in the UK anyway.) Of course
each week some MPs replied; but in June 1999, after I'd been at it some
three months, I started getting "covert" feedback from Virgin Radio.

The first feedback I got was from Danny Baker, on Sunday 13th June. That
weekend I was sending an article which contained biting criticism of the
police inaction in this case. Danny Baker on his Virgin radio show started
an angry rant that "he knows it's rubbish", ie. he was rubbishing what I'd
said in that weekend's faxed article. Unfortunately I wasn't recording this
programme.

The next possible Virgin-Radio feedback was a week later on 19th June 1999.
This is contained in the audio file above, in which Johnny Boy on his
"Wheels of Steel" programme says;

"and if you would like to put a triple play together, ahhh.... because
quite frankly Hipster and me are running out of ideas...."

He goes on to counter Hipster's "how dare you" with a protestation that he
is "only joking".

What I reckon is that my article faxed to MPs that weekend was forwarded
by one of the recipients to Virgin Radio. My article had included the words;

"I am beginning to run out of both new topics and energy to write
these articles."

So what I reckon is that Johnny Boy read the article.... and rephrased
the above line "run out of ... new topics" to "running out of ideas".
I recognise that this is a pretty tenuous inference to make.... but do
listen to the audio file, from the "ahhh...." pause in JB's speech you
can guess he is about to say something "risky" and at someone's expense.
Anyway, I listen to the Wheels of Steel regularly and will continue to do
so, recording it as I always do - so any future funny remarks will get
immortalised on these pages!

7203


--
Posted via NewsDemon.com - Premium Uncensored Newsgroup Service
------->>>>>>http://www.NewsDemon.com<<<<<<------
Unlimited Access, Anonymous Accounts, Uncensored Broadband Access
 
"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in message
news:wNadnSzMLvYt3mfVnZ2dnUVZ_jCdnZ2d@earthlink.com...
ian field wrote:

"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
message
news:gfakf49ebfpb7mhvagnobe77fdfuq15llf@4ax.com...
On Sat, 18 Oct 2008 18:07:50 +0100, "ian field"
gangprobing.alien@ntlworld.com> wrote:


"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
message
news:cj4kf49h8e0vih03dcolc8frkfgsgks0sp@4ax.com...
On Sat, 18 Oct 2008 16:26:48 +0100, "ian field"
gangprobing.alien@ntlworld.com> wrote:

.............and others for AGC use.

The result of numerous google searches has turned up conflicting
answers,
I'm trying to find out how the discrete transistor AGC stages work in
TV
&
radio IF strips.

One answer states that varying the base voltage of the controlled
stage
varies its input impedance to the previous stage by varying the B/E
bias,
the other states that using variable bias varies the collector
current -
on
which the stage's gain is dependent.

As hardly any manufacturers still use discrete devices for this
purpose
there seems to be very little I can find on this subject, please can
anyone
help?

TIA.



Tube radios backed off the DC grid bias of several stages, uisng a
feedback signal from the detector. Negative on the grids reduces
transconductance hence gain.

Transistor radios worked the same way... reducing DC base voltage
reduces collector current and reduces transconductance hence gain.

The first of the cited "answers" is wrong... reducing base voltage
reduces transconductance and gain of this stage, but also reduces
base
input impedance, which *increases* the gain of the previous stage
somewhat.

John



Thanks - any idea where I can find more reading on the technique?


My GE Transistor Manual (7e, 1964) has a few pages on transistor radio
AVC. It's a good reference for discrete transistor design. Maybe
alibris or ebay can turn one up.

Hey, Amazon has it...

http://www.amazon.com/GE-Transistor-Manual-7th-Ed/dp/B000IW9ITE

John



Thanks - I was hoping for something to download though.


http://www.pmillett.com/technical_books_online.htm has some early
transistor books, along with books about radio..
Thanks - it'll take me a while to go through all the stuff I downloaded.
 
"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in message
news:gfakf49ebfpb7mhvagnobe77fdfuq15llf@4ax.com...
On Sat, 18 Oct 2008 18:07:50 +0100, "ian field"
gangprobing.alien@ntlworld.com> wrote:


"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
message
news:cj4kf49h8e0vih03dcolc8frkfgsgks0sp@4ax.com...
On Sat, 18 Oct 2008 16:26:48 +0100, "ian field"
gangprobing.alien@ntlworld.com> wrote:

.............and others for AGC use.

The result of numerous google searches has turned up conflicting
answers,
I'm trying to find out how the discrete transistor AGC stages work in TV
&
radio IF strips.

One answer states that varying the base voltage of the controlled stage
varies its input impedance to the previous stage by varying the B/E
bias,
the other states that using variable bias varies the collector current -
on
which the stage's gain is dependent.

As hardly any manufacturers still use discrete devices for this purpose
there seems to be very little I can find on this subject, please can
anyone
help?

TIA.



Tube radios backed off the DC grid bias of several stages, uisng a
feedback signal from the detector. Negative on the grids reduces
transconductance hence gain.

Transistor radios worked the same way... reducing DC base voltage
reduces collector current and reduces transconductance hence gain.

The first of the cited "answers" is wrong... reducing base voltage
reduces transconductance and gain of this stage, but also reduces base
input impedance, which *increases* the gain of the previous stage
somewhat.

John



Thanks - any idea where I can find more reading on the technique?


My GE Transistor Manual (7e, 1964) has a few pages on transistor radio
AVC. It's a good reference for discrete transistor design. Maybe
alibris or ebay can turn one up.

Hey, Amazon has it...

http://www.amazon.com/GE-Transistor-Manual-7th-Ed/dp/B000IW9ITE

John
Thanks - I was hoping for something to download though.
 
"Michael A. Terrell" wrote:
"Don Bowey" <dbowey@comcast.net> wrote in message
news:C3F9A292.B1A38%dbowey@comcast.net...
On 3/9/08 2:14 PM, in article fr1jvs$9d$1@aioe.org, "Michael A. Terrell"
mike.terreIl@earthlink.net> wrote:


"Don Bowey" <dbowey@comcast.net> wrote in message
news:C3F9A02C.B1A32%dbowey@comcast.net...
On 3/9/08 1:24 PM, in article fr1h2a$lsg$1@aioe.org, "Michael A.
Terrell"
mike.terreIl@earthlink.net> wrote:


"Don Bowey" <dbowey@comcast.net> wrote in message
news:C3F961E8.B19BB%dbowey@comcast.net...
On 3/9/08 7:14 AM, in article
53e0e71f-f047-406d-8f85-319bc4af7e06@13g2000hsb.googlegroups.com,
"bill.sloman@ieee.org" <bill.sloman@ieee.org> wrote:

On Mar 9, 2:40 pm, John Fields <jfie...@austininstruments.com
wrote:
On Sun, 9 Mar 2008 04:42:53 -0700 (PDT), bill.slo...@ieee.org
wrote:
On Mar 9, 10:47 am, "Michael A. Terrell"
mike.terr...@earthlink.net
wrote:
Hello folks,

I am getting cheap these days, I am trying to cut corner by
tripling
the
capacitance in the capacitor, is this possible? I have heard
that
it's
possible. Some people have done it successfully. I am just
wondering
if
any of you smart dumbass can help.

If you weren't quite the ill-informed idiot that you are, you'd
know
that the dielectric in an electrolytic capacitor is formed by the
electrolytic oxidation of the surface of the aluminium foil the
forms
the plates of the capacitor.

---
LOL, hook, line, and sinker! :

http://www.vcomp.co.uk/tech_tips/reform_caps/reform_caps.htm

If you weren't another uninformed idiot, you'd realise that the
proposition is at least potentionaly rational, even though Michael
Terrell is the source. It would be a daft thing to do, but could
work,
after a fashion.

--
Bill Sloman, Nijmegen

Bill, you're an idiot. Mike Terrell didn't post that.


So what Bill Board? I'm trying to get your brain to exercise and to
share
your intelligence if you had one. Evidently none of you seemed to
have
the brain, the brain you have is a Bla-bla brain. I don't believe
you
guys suggested -ebay, -China, -Reverse polarity, -Decrease Current to
3A
from 800A... What a whole bunch of Retards. No wonder why you went
to
War like me serving the Evil master.


Does the Evil Master force you to be a cowardly POS, or are you just
naturally a CPOS?




I DON"T WORK FOR YOUR EVIL MASTER DUMMY. WHY ASK SUCH A DUMB QUESTION
DUMBASS?

STOP YOUR SHIT... AND USE YOUR BRIAN TO TRACE THE ROOT CAUSE DUMMY, OK?

OK, I get it. You are naturally a cowardly piece of shit. It suits
you.


Yup.. You got that right Dumbass. Oh I feel good to see you down and
suffer at the pumps... Cause you followed my evil master with me didn't
you? Bye Incredible Cock sucker.. Have a bad one.

--
Service to my evil master? Been there, Done that, and I've got my DD666 to
prove it.
Member of DAV #666.

Michael A. Terrell
Central Florida

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
 
On Sun, 9 Mar 2008 16:57:22 -0700 (PDT), bill.sloman@ieee.org wrote:

On Mar 9, 9:47 pm, Jamie
jamie_ka1lpa_not_valid_after_ka1l...@charter.net> wrote:
Don Bowey wrote:
On 3/9/08 7:14 AM, in article
53e0e71f-f047-406d-8f85-319bc4af7...@13g2000hsb.googlegroups.com,
"bill.slo...@ieee.org" <bill.slo...@ieee.org> wrote:

On Mar 9, 2:40 pm, John Fields <jfie...@austininstruments.com> wrote:

On Sun, 9 Mar 2008 04:42:53 -0700 (PDT), bill.slo...@ieee.org wrote:

On Mar 9, 10:47 am, "Michael A. Terrell" <mike.terr...@earthlink.net
wrote:

Hello folks,

I am getting cheap these days, I am trying to cut corner by tripling the
capacitance in the capacitor, is this possible?  I have heard that it's
possible.  Some people have done it successfully.  I am just wondering if
any of you smart dumbass can help.

If you weren't quite the ill-informed idiot that you are, you'd know
that the dielectric in an electrolytic capacitor is formed by the
electrolytic oxidation of the surface of the aluminium foil the forms
the plates of the capacitor.

---
LOL, hook, line, and sinker! :

http://www.vcomp.co.uk/tech_tips/reform_caps/reform_caps.htm

If you weren't another uninformed idiot, you'd realise that the
proposition is at least potentionaly rational, even though Michael
Terrell is the source. It would be a daft thing to do, but could work,
after a fashion.

--
Bill Sloman, Nijmegen

Bill, you're an idiot.  Mike Terrell didn't post that.

and what makes you so sure?

The signature is suggestive. The original Mike Terrell might have
developed a bizarre sense of humour, but fraud does seem much more
probable.
http://news.aioe.org/

is a free news server started in italy (their caps)in January.
Customrs are allowed 25 unauthenticated posts daily, but records are
kept for 30 days.

These mesages are time-stamped 3hrs earlier than EST, which sounds
more like the US west coast, than Italy.

RL

RL
 
Because of the many layers, it's difficult to dry the transformer. There are
some methods to accelerate the draining. Just vacuum is one method (no need
for high temperature). But I think that 40°C for a week is enough. The
difficult part is to know if it's dry or not.
Vacuum is a method for evaluation. If you put vacuum, and close the
stopcock, the vacuum will drop because of added moisture (or increase,
depending on how you measure). If the vacuum drops it shows wet. If the
vacuum stop dropping the transformer will be dry.

--
Yianni
9jir_2006@yahoo.gr
(Remove the number nine from my email address to send me email)


"Lostgallifreyan" <no-one@nowhere.net> wrote in message
news:Xns9991D83603C23zoodlewurdle@140.99.99.130...
hihihi <See@signature-at-the-bottom-of-the-message.invalid> wrote in
news:46c89acd$0$293$dbd4d001@news.wanadoo.nl:

Lostgallifreyan wrote:

Don't worry about the water unless you see visible
corrosion, which I doubt you will, wire enamelling being what it is.
Just bake them for a few hours, a day perhaps, at 80°C. The omly
possible risk of that is that the cost might make the transformers
look less of a good deal. >:) So maybe put them in a black-painted
biscuit tin

Good tip.

and put the lot out in the sun for a couple of days.

I have them currently in a green house type of thing, to get higher
temperatures.
This morning the outside of one trafo was at least 40 degree Celsius.
With your blackbox idea this temperature will go up.

Just wait till you can test by putting them in a fridge or freezer
and no longer see condensation form on the inside of the tape layer.

Good tip.

I had a theoretical idea.
Put trafos in vacuum box.
Suck air out, with it the moist in the air.
Slowly add air again, while heating the air inside to 80 degree
Celsius. The hot dry air will then go deep inside the trafos.
Part of the water will evaporate into the dry air.
Suck the moist air out of vacuum box again.
Repeat process until all water is removed from trafos.

Problem is, i do not have a vacuum box.
Allthough my mind is itching, how can i make one, with nothing :))



Vacuum and cold are closely related, so you could try a peltier. :) Best
not though, far too awkward, and the cold trap will just cool your box...

A better idea is to buy a cheap paper bag of granulated sugar and seal
that
in the box with the transformers. Except on a really dry day, in which
case
placing the lid with a small air gap will be enough.
 
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