12 Mar
2008
12 Mar
'08
12:10 a.m.
So I'm cleaning out the Ergo 201 terminal I mentioned earlier (and
preparing to do a cap kit on it since it needs it) and I've run across
something that looks kind of like an electrolytic capacitor on a diet.
I'm unable to identify it and I feel like an idiot :). At any rate, it
appears to be leaking something so I'd like to replace it, once I can
figure out what it is. Wish I had a schematic for this thing.
Here's a couple of pictures of it:
http://yahozna.dyndns.org/scratch/mystery-1.jpg
http://yahozna.dyndns.org/scratch/mystery-2.jpg
Any ideas? The only markings on it are:
1019
8320
TWN
on one side, and
C-H-L
TDK
on the other.
The positive terminal is labeled (which is the opposite of most
capacitors I've seen...)
Any thoughts?
As always, thanks...
- Josh
12 Mar
12 Mar
10:46 a.m.
Date: Tue, 11 Mar 2008 21:10:08 -0700
From: derschjo at msu.edu
To:
Subject: In which I further expose my ignorance: What is this electronic component?
So I'm cleaning out the Ergo 201 terminal I mentioned earlier (and
preparing to do a cap kit on it since it needs it) and I've run across
something that looks kind of like an electrolytic capacitor on a diet.
I'm unable to identify it and I feel like an idiot :). At any rate, it
appears to be leaking something so I'd like to replace it, once I can
figure out what it is. Wish I had a schematic for this thing.
Here's a couple of pictures of it:
http://yahozna.dyndns.org/scratch/mystery-1.jpg
http://yahozna.dyndns.org/scratch/mystery-2.jpg
Any ideas? The only markings on it are:
1019
8320
TWN
on one side, and
C-H-L
TDK
on the other.
The positive terminal is labeled (which is the opposite of most
capacitors I've seen...)
Any thoughts?
As always, thanks...
- Josh
Hi Josh
It is most likely a capacitor but it might even be a battery.
The value is another problem. I don't know how you might determine
what it was. None of the numbers look like value descriptions.
You might peel the plastic cover off and look at what is hiding
inside. It might be a resistor/capacitor or a coil/capacitor
circuit. In any case you could see if it really was a cap or
battery.
Since it is already bad, you'll not do it much harm.
Dwight
_________________________________________________________________
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13 Mar
13 Mar
12:34 a.m.
From: dkelvey at hotmail.com
To: cctalk at classiccmp.org
Date: Wed, 12 Mar 2008 07:46:19 -0700
Subject: RE: In which I further expose my ignorance: What is this electronic component?
> Date: Tue, 11 Mar 2008 21:10:08 -0700
> From: derschjo at msu.edu
> To:
> Subject: In which I further expose my ignorance: What is this electronic component?
>
---snip---
Hi Josh
It is most likely a capacitor but it might even be a battery.
The value is another problem. I don't know how you might determine
what it was. None of the numbers look like value descriptions.
You might peel the plastic cover off and look at what is hiding
inside. It might be a resistor/capacitor or a coil/capacitor
circuit. In any case you could see if it really was a cap or
battery.
Since it is already bad, you'll not do it much harm.
Dwight
Hi
I agree, it is a coil. Don't know what I was thinking. TDK is
a sure giveaway.
Dwight
_________________________________________________________________
Shed those extra pounds with MSN and The Biggest Loser!
http://biggestloser.msn.com/
12 Mar
12 Mar
12:33 p.m.
New subject: In which I further expose my ignorance: What is this electronic component?
On Tue, 11 Mar 2008, Josh Dersch wrote:
So I'm cleaning out the Ergo 201 terminal I
mentioned earlier (and preparing
to do a cap kit on it since it needs it) and I've run across something that
looks kind of like an electrolytic capacitor on a diet. I'm unable to
identify it and I feel like an idiot :). At any rate, it appears to be
leaking something so I'd like to replace it, once I can figure out what it
is. Wish I had a schematic for this thing.
Here's a couple of pictures of it:
http://yahozna.dyndns.org/scratch/mystery-1.jpg
http://yahozna.dyndns.org/scratch/mystery-2.jpg
Any ideas? The only markings on it are:
1019
8320
TWN
Thats a TDK inductor, basically a ferrite spool wound with enameled copper
wire. Dont know why its polarized, but some inductors have built in permanent
magnets to oppose the field generated by the normal current direction, giving
higher (unidirectional) saturation currents.
Its very unlikely anything is wrong with the inductor...
on one side, and
C-H-L
TDK
on the other.
The positive terminal is labeled (which is the opposite of most capacitors
I've seen...)
Any thoughts?
As always, thanks...
- Josh
Peter Wallace
Mesa Electronics
(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination.
1:57 p.m.
New subject: In which I further expose my ignorance: What is this electr
So I'm cleaning out the Ergo 201 terminal I
mentioned earlier (and
preparing to do a cap kit on it since it needs it) and I've run across
something that looks kind of like an electrolytic capacitor on a diet.
I'm unable to identify it and I feel like an idiot :). At any rate, it
appears to be leaking something so I'd like to replace it, once I can
figure out what it is. Wish I had a schematic for this thing.
Here's a couple of pictures of it:
http://yahozna.dyndns.org/scratch/mystery-1.jpg
http://yahozna.dyndns.org/scratch/mystery-2.jpg
Any ideas? The only markings on it are:
Yes this is inductor with a magnet superglued on top and sleeved with
shrink tubing to protect it. I don't see anything serious wrong with
it, just get that bit of glue off (it will come off with little nail
finger scratching). The funny tan/brown bit stuck to the side of the
shrink tubing is glue that you will find all over the board to glue
the capacitors and stuff down. Scratch these off as you replace
components, as it is bad stuff that turns conductive with time and
heat.
That inductor with magnet is for linearity to shape the horizontal
pulses for the yoke. Resolder horizontal circuit, vertical circuit
and power supply areas to take care of 90% solder issues.
Cheers, Wizard
7:04 p.m.
New subject: In which I further expose my ignorance: What is this electronic component?
On Tue, 2008-03-11 at 21:10 -0700, Josh Dersch wrote:
So I'm cleaning out the Ergo 201 terminal I
mentioned earlier (and
preparing to do a cap kit on it since it needs it) and I've run across
something that looks kind of like an electrolytic capacitor on a diet.
I'm unable to identify it and I feel like an idiot :). At any rate, it
appears to be leaking something so I'd like to replace it, once I can
figure out what it is. Wish I had a schematic for this thing.
Here's a couple of pictures of it:
http://yahozna.dyndns.org/scratch/mystery-1.jpg
http://yahozna.dyndns.org/scratch/mystery-2.jpg
Any ideas? The only markings on it are:
It's either an inductor or an electrolytic with a "thing" for corsetry.
Gordon
7:23 p.m.
New subject: In which I further expose my ignorance: What is this electronic
So I'm cleaning out the Ergo 201 terminal I mentioned earlier (and
preparing to do a cap kit on it since it needs it) and I've run across
something that looks kind of like an electrolytic capacitor on a diet.
I'm unable to identify it and I feel like an idiot :). At any rate, it
appears to be leaking something so I'd like to replace it, once I can
figure out what it is. Wish I had a schematic for this thing.
Here's a couple of pictures of it:
http://yahozna.dyndns.org/scratch/mystery-1.jpg
http://yahozna.dyndns.org/scratch/mystery-2.jpg
Any ideas? The only markings on it are:
1019
8320
TWN
on one side, and
C-H-L
TDK
It looks like an inductor, and TDK are of course known for
(electo)magnetic stuff. The only puzzler is the polarity marking.
Now, as you may know, ferrite cores can saturate, so that the inductance
of a ferrite-cored inductor depends on the current though it. And there
are such inductors with a permanent bias magnet, so that the
curent-inductance characteristic depends on the direction of the currnet.
And yse, such components are commonly used in monitor, and thus terminal,
horizontal deflection circuits as linearity correction devices. Some are
adjustable (the magnet can be turned to alter its effect), some are fixed.
The only thing is, I've never seen one with a polarity marking (often
they pnly fit the PCB one way round), and they're normally larger than
the comopneent you show.
But have yo tried to see if it's magnetic? Will it attract a
non-magnetised tool?
-tony
13 Mar
13 Mar
2:25 a.m.
New subject: In which I further expose my ignorance: What is this electronic
Thanks for all the responses. It does look like it's an inductor, and
it is magnetic (wouldn't have thought to try that :)). Now I know, for
future reference.
Josh
Tony Duell wrote:
So I'm
cleaning out the Ergo 201 terminal I mentioned earlier (and
preparing to do a cap kit on it since it needs it) and I've run across
something that looks kind of like an electrolytic capacitor on a diet.
I'm unable to identify it and I feel like an idiot :). At any rate, it
appears to be leaking something so I'd like to replace it, once I can
figure out what it is. Wish I had a schematic for this thing.
Here's a couple of pictures of it:
http://yahozna.dyndns.org/scratch/mystery-1.jpg
http://yahozna.dyndns.org/scratch/mystery-2.jpg
Any ideas? The only markings on it are:
1019
8320
TWN
on one side, and
C-H-L
TDK
It looks like an inductor, and TDK are of course known for
(electo)magnetic stuff. The only puzzler is the polarity marking.
Now, as you may know, ferrite cores can saturate, so that the inductance
of a ferrite-cored inductor depends on the current though it. And there
are such inductors with a permanent bias magnet, so that the
curent-inductance characteristic depends on the direction of the currnet.
And yse, such components are commonly used in monitor, and thus terminal,
horizontal deflection circuits as linearity correction devices. Some are
adjustable (the magnet can be turned to alter its effect), some are fixed.
The only thing is, I've never seen one with a polarity marking (often
they pnly fit the PCB one way round), and they're normally larger than
the comopneent you show.
But have yo tried to see if it's magnetic? Will it attract a
non-magnetised tool?
-tony
3:38 a.m.
New subject: In which I further expose my ignorance: What is this electronic
On Wed, 2008-03-12 at 23:23 +0000, Tony Duell wrote:
The only thing is, I've never seen one with a
polarity marking (often
they pnly fit the PCB one way round), and they're normally larger than
the comopneent you show.
I'm surprised at that - they crop up in monitors a lot, usually where
they linearise (or non-linearise) scan waveforms.
The magnet gives the coil slightly different properties depending on
which way round the current flows.
Gordon
2:42 p.m.
New subject: In which I further expose my ignorance: What is this electronic
On Wed, 2008-03-12 at 23:23 +0000, Tony Duell wrote:
I think you misunderstood me. I've seen many linearity coils with
permanent magnet bias -- they turn up in most monitors. In fact I just
have to look on my bench now to see the monitor PCB from an HP9826
machine [1] to see one of these devices.
What I have never seen is one with a '+' marking. Of coruse they're
polarised (getting them the wrong way round gives an 'interesting'
display). Most of the time they are physically unsymmetircal so that they
either only fit the right way (a third offset pin so the PCB pads will
only take the compoennt one way round) or at least you can line them up
with the silk screen.
[1] THis 'monitor' PCB contains the video amplifier and horizontal
deflcition circuits only. The vertical yoke connections go via varios
connectors to the text video PCB which also contains the vertical
deflection circuit.
The only thing is, I've never seen one with a
polarity marking (often
they pnly fit the PCB one way round), and they're normally larger than
the comopneent you show.
I'm surprised at that - they crop up in monitors a lot, usually where
they linearise (or non-linearise) scan waveforms.
The magnet gives the coil slightly different properties depending on
which way round the current flows.
Exactly.
-tony
5954
days inactive
5955
days old
9 comments
6 participants
participants (6)
-
ard＠p850ug1.demon.co.uk -
derschjo＠msu.edu -
dkelvey＠hotmail.com -
gordonjcp＠gjcp.net -
jpero＠sympatico.ca -
pcw＠mesanet.com