What is a positor?

D

dave

Guest
I'm helping a friend repair a tv and came across what is termed a
positor in the power supply - what is it, and what does it do? (and
how do I test it!)
I've seen people refer to these as PTC resistors (I know what these
are) but this device has three legs.
 
a "posistor" is the same as a "PTC"
maybe PTC sands for Posistor T??? C??? does anybody else know?

just like "frame" is the same as "field"


"dave" <dave_bowlers@yahoo.co.uk> wrote in message
news:af5b575b.0309242246.7dff2548@posting.google.com...
: I'm helping a friend repair a tv and came across what is termed a
: positor in the power supply - what is it, and what does it do? (and
: how do I test it!)
: I've seen people refer to these as PTC resistors (I know what these
: are) but this device has three legs.
 
Hi Eric,

Eric schrieb:
a "posistor" is the same as a "PTC"
maybe PTC sands for Posistor T??? C??? does anybody else know?
Click to expand...
That stands IMHO for "Positive Temperature Coefficient"

HTH
Wolfgang
 
thanks I forgot that, Sorry I have these dork attacks from time to time.






"Wolfgang Mahringer" <wolfgang.mahringer@sbg.at> wrote in message
news:5rAcb.13$9n5.1142942@news.salzburg-online.at...
: Hi Eric,
:
: Eric schrieb:
: > a "posistor" is the same as a "PTC"
: > maybe PTC sands for Posistor T??? C??? does anybody else know?
:
: That stands IMHO for "Positive Temperature Coefficient"
:
: HTH
: Wolfgang
:
 
Eric scribbled:
a "posistor" is the same as a "PTC"
maybe PTC sands for Posistor T??? C??? does anybody else know?
Click to expand...
Positive Temperature Coefficient, AFAIK.

--
"No! Don't pull the PSU cabl $$(#)(#%&*#%*( NO CARRIER"
E-mail address is fake. Please reply to the group!
 
In article <3f72c37a@clear.net.nz>, some1@clare.co.nz mentioned...
a "posistor" is the same as a "PTC"
maybe PTC sands for Posistor T??? C??? does anybody else know?
Click to expand...
Positive temperature coefficient resistor. Aonther name that might be
used is PTC varistor.


"dave" <dave_bowlers@yahoo.co.uk> wrote in message
news:af5b575b.0309242246.7dff2548@posting.google.com...
: I'm helping a friend repair a tv and came across what is termed a
: positor in the power supply - what is it, and what does it do? (and
: how do I test it!)
: I've seen people refer to these as PTC resistors (I know what these
: are) but this device has three legs.
Click to expand...

--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
http://users.pandora.be/educypedia/electronics/databank.htm
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you add NOSPAM in the
Subject: line with other stuff. alondra101 <at> hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html
@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@
 
"Watson A.Name - Watt Sun" <alondra101@hotmail.com> wrote in message
news:MPG.19dd55b250633f4298970b@news.dslextreme.com...
In article <3f72c37a@clear.net.nz>, some1@clare.co.nz mentioned...
a "posistor" is the same as a "PTC"
maybe PTC sands for Posistor T??? C??? does anybody else know?

Positive temperature coefficient resistor. Aonther name that might be
used is PTC varistor.


"dave" <dave_bowlers@yahoo.co.uk> wrote in message
news:af5b575b.0309242246.7dff2548@posting.google.com...
: I'm helping a friend repair a tv and came across what is termed a
: positor in the power supply - what is it, and what does it do? (and
: how do I test it!)
: I've seen people refer to these as PTC resistors (I know what these
: are) but this device has three legs.
Click to expand...
This is the device that controls the current in the de-gaussing circuit.
It is 2 TC pellets. One is a PTC and the other is an NTC. One is in
series with the mains AC input to the coil and the other is across
the coil acting as a shunt.

They are in thermal contact with each other so that the one which gets hot
controls the other one. I'll leave it to the reader to decide which is
which. 8Ź)


--
Graham W http://www.gcw.org.uk/ XP1800+ Page added, Graphics Tutorial
WIMBORNE http://www.wessex-astro-society.freeserve.co.uk/ Wessex
Dorset UK Astro Society's Web pages, Info, Meeting Dates, Sites & Maps
Change 'news' to 'sewn' in my Reply address to avoid my spam filter.
 
On Fri, 26 Sep 2003 04:43:17 +0100, Watson A.Name - Watt Sun wrote:

ositive temperature coefficient resistor. Aonther name that might be
used is PTC varistor.
Click to expand...
More preferably "PTC thermistor"

"Varistor" is usually taken to mean the type of voltage dependent resistor
(VDR) that exhibits a very high resistance up to a well-defined threshold
voltage then abruptly changes to low resistance (Panasonic ZNR, Siemens
(Epcos) SIOV, etc).


--
Then there's duct tape ...
(Garrison Keillor)
nofr@sbhevre.pbzchyvax.pb.hx
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top