Identify these parts?

[Gareth Magennis]

Hi,

I have 2 parts in a SMPS that I think are PTC thermistors. One is marked
KC103P, the other KC221K, the first a blue disk looking just like this:
http://uk.farnell.com/jsp/level5/module.jsp?moduleId=en/207356.xml

The second actually looks more like a huge blue tantalum cap, smaller than
the first but fatter, not a disc.


If you Google these, you come up with all those companies that can sell you
1000 at a time, but I can't find any data to tell me what they are or an
equivalent.




Any help appreciated.,


thanks,


Gareth.

 

[bz]

"Gareth Magennis" <sound.service@btconnect.com> wrote in
news:aIqdnf5GW8AvQ6bVnZ2dnUVZ8qGdnZ2d@bt.com:

Hi,

I have 2 parts in a SMPS that I think are PTC thermistors. One is
marked KC103P, the other KC221K, the first a blue disk looking just like
this: http://uk.farnell.com/jsp/level5/module.jsp?moduleId=en/207356.xml

The second actually looks more like a huge blue tantalum cap, smaller
than the first but fatter, not a disc.


If you Google these, you come up with all those companies that can sell
you 1000 at a time, but I can't find any data to tell me what they are
or an equivalent.

http://www.galco.com/scripts/cgiip.exe/wa/wcat/browse.htm?sort=cat&line=PAS
SIVE&cat=MOV&mfg=&source=ADWORDS&gclid=CPyUkqrYxpMCFQKaFQodjRz0Cg

metal oxide varistor. MOV

http://www.galco.com/circuit/TechTips-MOV.htm

Acts like a short circuit to voltage spikes.





--
bz

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

bz+spr@ch100-5.chem.lsu.edu remove ch100-5 to avoid spam trap

 

[bz]

"Gareth Magennis" <sound.service@btconnect.com> wrote in
news:aIqdnf5GW8AvQ6bVnZ2dnUVZ8qGdnZ2d@bt.com:

Hi,

I have 2 parts in a SMPS that I think are PTC thermistors. One is
marked KC103P, the other KC221K, the first a blue disk looking just like
this: http://uk.farnell.com/jsp/level5/module.jsp?moduleId=en/207356.xml

The second actually looks more like a huge blue tantalum cap, smaller
than the first but fatter, not a disc.


If you Google these, you come up with all those companies that can sell
you 1000 at a time, but I can't find any data to tell me what they are
or an equivalent.

http://www.galco.com/scripts/cgiip.exe/wa/wcat/browse.htm?sort=cat&line=PAS
SIVE&cat=MOV&mfg=&source=ADWORDS&gclid=CPyUkqrYxpMCFQKaFQodjRz0Cg

metal oxide varistor. MOV

http://www.galco.com/circuit/TechTips-MOV.htm

Acts like a short circuit to voltage spikes.





--
bz

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

bz+spr@ch100-5.chem.lsu.edu remove ch100-5 to avoid spam trap

 

[Gareth Magennis]

"bz" <bz+spr@ch100-5.chem.lsu.edu> wrote in message
news:Xns9AAB4E00E813CWQAHBGMXSZHVspammote@130.39.198.139...

"Gareth Magennis" <sound.service@btconnect.com> wrote in
news:aIqdnf5GW8AvQ6bVnZ2dnUVZ8qGdnZ2d@bt.com:

Hi,

I have 2 parts in a SMPS that I think are PTC thermistors. One is
marked KC103P, the other KC221K, the first a blue disk looking just like
this: http://uk.farnell.com/jsp/level5/module.jsp?moduleId=en/207356.xml

The second actually looks more like a huge blue tantalum cap, smaller
than the first but fatter, not a disc.


If you Google these, you come up with all those companies that can sell
you 1000 at a time, but I can't find any data to tell me what they are
or an equivalent.


http://www.galco.com/scripts/cgiip.exe/wa/wcat/browse.htm?sort=cat&line=PAS
SIVE&cat=MOV&mfg=&source=ADWORDS&gclid=CPyUkqrYxpMCFQKaFQodjRz0Cg

metal oxide varistor. MOV

http://www.galco.com/circuit/TechTips-MOV.htm

Acts like a short circuit to voltage spikes.

Makes sense now of course. Thanks.



Gareth.

 

[Gareth Magennis]

"bz" <bz+spr@ch100-5.chem.lsu.edu> wrote in message
news:Xns9AAB4E00E813CWQAHBGMXSZHVspammote@130.39.198.139...

"Gareth Magennis" <sound.service@btconnect.com> wrote in
news:aIqdnf5GW8AvQ6bVnZ2dnUVZ8qGdnZ2d@bt.com:

Hi,

I have 2 parts in a SMPS that I think are PTC thermistors. One is
marked KC103P, the other KC221K, the first a blue disk looking just like
this: http://uk.farnell.com/jsp/level5/module.jsp?moduleId=en/207356.xml

The second actually looks more like a huge blue tantalum cap, smaller
than the first but fatter, not a disc.


If you Google these, you come up with all those companies that can sell
you 1000 at a time, but I can't find any data to tell me what they are
or an equivalent.


http://www.galco.com/scripts/cgiip.exe/wa/wcat/browse.htm?sort=cat&line=PAS
SIVE&cat=MOV&mfg=&source=ADWORDS&gclid=CPyUkqrYxpMCFQKaFQodjRz0Cg

metal oxide varistor. MOV

http://www.galco.com/circuit/TechTips-MOV.htm

Acts like a short circuit to voltage spikes.

Makes sense now of course. Thanks.



Gareth.

 

[LW]

http://easyurl.net/Tektronix2000

 

[R. LaCasse]

On Tue, 27 May 2008 13:38:38 -0400, mm <NOPSAMmm2005@bigfoot.com> wrote:

|>I haven't read much of the thread but I'm sure someone pointed out
|>that the 16 volts drops quite a bit when it is actually charging
|>something. At least with a cheap model. Doesn't that solve the
|>problem?


In a 12v, 8amp, reg charge 10%= .8amp

Sure they all do that, and on the other hand if you use a constant
charger with a 1-->>1.5 amp capacity, even a 9 volt charger will charge a
12v battery by borrowing amps<<-->>volts usually till 13.5 then drops to
regulated thermistor "overheat" setting..

I see the charger using up to an extra 5volts=1 amp if it borrows
the whole 1 amp which is why a dedicated 9 volt with high amps will charge a
higher volt less amp battery in the constant voltage system....

A 1.5 amp constant charger will charge the same battery as a
constant (current) variable volt regulated automatic charger in the same
amount of time.

The WalWart (Universal Charger) max .8 amp things would only amount
to very low trickle charge of some .2amps and might take a very long time on
a M/Cycle battery......it might take a week on some 10amp battery...

I figure try anything within common sense and it will work, maybe
remember to look at the charging system as watts and the charger shouldn't
over Watt the battery:

Automatic Charger MAX Quick Charge:

12v X 6amps=72watts

Small M/C battery:

12v X 8amps= 96watts

As long as the chargers watts don't overrate the battery's watts,
your fairly safe but not too prudent......since a 10% battery amp is the
best regular charge.....

 

[Brasto]

On 28 apr, 18:49, Chuck <c...@deja.net> wrote:

On Sat, 26 Apr 2008 12:56:40 -0700 (PDT),Brasto

bram.st...@gmail.com> wrote:
This Tuner does not have any audio output. Probing its ckts with the
Oscilloscope showed that at two identical IC's marked 5223  5711 the
audio is present at one pin only. It looks like the system is in a
MUTE mode or the signal is not switched to the output-jacks. The front-
End and Tuning ckts are OK.
I cannot find any data on the IC's , schematic of the KT-747L would be
very helpfull.........
Is there anybody out here who has some knowledge on this receiver?
TY
Bram

The ics are probably M5223 op amps.  Check the pinout of a NTE778A for
the operating parameters.  I don't know if this is your problem but
Kenwoods of this era had a problem with electrolytic caps shorting out
in audio circuits.  Chuck

Hi Chuck TY for your response,
My problem is solved, close examination showed a solderbridge which
did not make sense looking at the PCB trace and landings. I removed
the excessive solder and PRESTO....the set worked as advertised again.
It's owner failed to explain who made the previous repair
attempt........

 

[Sparkey]

On May 28, 5:38 am, JW <n...@dev.null> wrote:

On Tue, 27 May 2008 19:34:51 -0700 (PDT) Sparkey <wwsp...@aol.com> wrote
in Message id:
b995d753-8b98-4bd8-8fcb-78e3af8a2...@d77g2000hsb.googlegroups.com>:

I need to figure out which smd class this ic chip is.
If you take a look at this pichttp://members.aol.com/ta7205/MVC-181f

The 8 pin chip with the red dot is the one I need to replace.
I have an SOIC 8 version sitting just to the left of the chip.
Its quite a bit smaller.

Even increasing the picture size wouldn't allow me to see the writing on
the device. Can you post exactly what is on the chip?

It took a lot of magnification but
4LC 1728 1Q5 is the number on the chip.
I reloaded the pic under a different name. The green arrow points to
the IC in question. http://members.aol.com/ta7205/chip.jpg

Thanks,
Spark

 

[Eeyore]

gareth magennis wrote:

So what would be the maximum voltage drop you might expect from a non
overloaded mains system?

Crikey. I know where I'd test with a highish power PA rig, the local venue that
has some 5kW ? or so of amps but last year I had a separate 32A circuit run in
just for the amp rack so I doubt it would be more than a few volts.

Graham

 

On Tuesday, May 27, 2008 at 5:12:51 AM UTC-5, Gareth Magennis wrote:

Hi,

I have 2 parts in a SMPS that I think are PTC thermistors. One is marked
KC103P, the other KC221K, the first a blue disk looking just like this:
http://uk.farnell.com/jsp/level5/module.jsp?moduleId=en/207356.xml

The second actually looks more like a huge blue tantalum cap, smaller than
the first but fatter, not a disc.


If you Google these, you come up with all those companies that can sell you
1000 at a time, but I can't find any data to tell me what they are or an
equivalent.




Any help appreciated.,


thanks,


Gareth.

I think what your looking at is a MOV..

 

[Jon Elson]

amparovalbuena@gmail.com wrote:

On Tuesday, May 27, 2008 at 5:12:51 AM UTC-5, Gareth Magennis wrote:
Hi,

I have 2 parts in a SMPS that I think are PTC thermistors. One is marked
KC103P, the other KC221K, the first a blue disk looking just like this:
http://uk.farnell.com/jsp/level5/module.jsp?moduleId=en/207356.xml

The PTC thermistors are from Keystone Carbon Corp., I used these some years
ago. Not sure they are in business anymore, but the line may have been
picked up by one of the components manufacturers.

I did find this :
https://www.galco.com/buy/Keystone-Carbon-Company/KC010L

But that might be new-old stock.

Jon

 

[Phil Allison]

Jon Elson wrote:

The PTC thermistors are from Keystone Carbon Corp., I used these some years
ago. Not sure they are in business anymore, but the line may have been
picked up by one of the components manufacturers.

I did find this :
https://www.galco.com/buy/Keystone-Carbon-Company/KC010L

** That pic looks exactly like a regular NTC thermistor.

Mains voltage rated PTCs are used in the AC supply to PSUs, both transformer and switchmode to provide anti-surge PLUS overload protection.

Impressive to see one doing its job, running stinking hot while allowing only 25mA or so into the faulty PSU.


..... Phil

 

[Jon Elson]

Phil Allison wrote:

Jon Elson wrote:


The PTC thermistors are from Keystone Carbon Corp., I used these some
years
ago. Not sure they are in business anymore, but the line may have been
picked up by one of the components manufacturers.

I did find this :
https://www.galco.com/buy/Keystone-Carbon-Company/KC010L


** That pic looks exactly like a regular NTC thermistor.

OOPs, that is indeed what I was thinking of, was NTC, not PTC, for inrush
surge limiting.

Jon

 

[Michael A. Terrell]

amparovalbuena@gmail.com wrote:

On Tuesday, May 27, 2008 at 5:12:51 AM UTC-5, Gareth Magennis wrote:
Hi,

I have 2 parts in a SMPS that I think are PTC thermistors. One is marked
KC103P, the other KC221K, the first a blue disk looking just like this:
http://uk.farnell.com/jsp/level5/module.jsp?moduleId=en/207356.xml

The second actually looks more like a huge blue tantalum cap, smaller than
the first but fatter, not a disc.

If you Google these, you come up with all those companies that can sell you
1000 at a time, but I can't find any data to tell me what they are or an
equivalent.

I think what your looking at is a MOV..

You replied to a 17 year old message.

 

[Michael Black]

On Tue, 21 Jul 2015, Michael A. Terrell wrote:

amparovalbuena@gmail.com wrote:

On Tuesday, May 27, 2008 at 5:12:51 AM UTC-5, Gareth Magennis wrote:
Hi,

I have 2 parts in a SMPS that I think are PTC thermistors. One is marked
KC103P, the other KC221K, the first a blue disk looking just like this:
http://uk.farnell.com/jsp/level5/module.jsp?moduleId=en/207356.xml

The second actually looks more like a huge blue tantalum cap, smaller than
the first but fatter, not a disc.

If you Google these, you come up with all those companies that can sell you
1000 at a time, but I can't find any data to tell me what they are or an
equivalent.

I think what your looking at is a MOV..


You replied to a 17 year old message.

I've seen replies to older messages, but in this case, it's only been 7
years. 17 would have the original post in 1998.

And in this case, I seem to have missed the original post, so yes, it's
amusing to see the other replies, which clearly came because of the first
post.

It's often interesting to look at the original thread, because these old
post resurrectors often don't. They think they have something to add, yet
the original thread often covers the whole thing.

Michael

 

[Michael A. Terrell]

Michael Black wrote:

On Tue, 21 Jul 2015, Michael A. Terrell wrote:

You replied to a 17 year old message.

I've seen replies to older messages, but in this case, it's only been 7
years. 17 would have the original post in 1998.

You're right. I had seen a 16 year old message replied to on another
group a few minutes earlier, and wasn't paying close attention.

And in this case, I seem to have missed the original post, so yes, it's
amusing to see the other replies, which clearly came because of the first
post.

It's often interesting to look at the original thread, because these old
post resurrectors often don't. They think they have something to add, yet
the original thread often covers the whole thing.

Michael