Anyone used one of these?

C

Cursitor Doom

Guest
Given the shortcomings of low power battery testers/meters for checking
certain components that typically run at considerably higher working
voltages where any fault may only become apparent, has anyone any
thoughts on the utility, or otherwise, of these devices?

http://www.ebay.co.uk/itm/Transistor-Diode-Curve-Tracer-Component-Tracker-
Tester-Probes-BNC-Cables-/161294643173?
hash=item258de8efe5:m:miccP4BhvzYiDpcErFn7FDw
 
On Tuesday, January 26, 2016 at 9:03:11 AM UTC-5, Cursitor Doom wrote:
Given the shortcomings of low power battery testers/meters for checking
certain components that typically run at considerably higher working
voltages where any fault may only become apparent, has anyone any
thoughts on the utility, or otherwise, of these devices?

http://www.ebay.co.uk/itm/Transistor-Diode-Curve-Tracer-Component-Tracker-
Tester-Probes-BNC-Cables-/161294643173?
hash=item258de8efe5:m:miccP4BhvzYiDpcErFn7FDw
Click to expand...

Never used one.. but it says octopus. I recall this curve tracer that
a navy tech showed me once. A couple of transformers and R's..

Google octopus curve tracer and maybe you'll end up building on of your own.

George H.
 
On Tue, 26 Jan 2016 06:19:13 -0800, ggherold wrote:

On Tuesday, January 26, 2016 at 9:03:11 AM UTC-5, Cursitor Doom wrote:
Given the shortcomings of low power battery testers/meters for checking
certain components that typically run at considerably higher working
voltages where any fault may only become apparent, has anyone any
thoughts on the utility, or otherwise, of these devices?

http://www.ebay.co.uk/itm/Transistor-Diode-Curve-Tracer-Component-
Tracker-
Tester-Probes-BNC-Cables-/161294643173?
hash=item258de8efe5:m:miccP4BhvzYiDpcErFn7FDw

Never used one.. but it says octopus. I recall this curve tracer that a
navy tech showed me once. A couple of transformers and R's..

Google octopus curve tracer and maybe you'll end up building on of your
own.

George H.
Click to expand...

Thanks. I wouldn't have thought there was much to these things,
especially since they rely on an external scope display. I'm just curious
as to how useful they are compared to more common test kit.
 
"Cursitor Doom" <curd@notformail.com> wrote in message
news:n87u5i$4lt$5@dont-email.me...
Given the shortcomings of low power battery testers/meters for checking
certain components that typically run at considerably higher working
voltages where any fault may only become apparent, has anyone any
thoughts on the utility, or otherwise, of these devices?

http://www.ebay.co.uk/itm/Transistor-Diode-Curve-Tracer-Component-Tracker-
Tester-Probes-BNC-Cables-/161294643173?
hash=item258de8efe5:m:miccP4BhvzYiDpcErFn7FDw
Click to expand...

All this ammouts to is a transformer, capacitor and resistor in a box. Just
do a search for an Octopus component tester. Years ago it was of some use
and may be today if you have a known good board and one you are testing.

Today there are much beter component testers out. For about $ 20 you can
get the circuit board of a component tester that is much beter for testing
components out of the circuit.

This ebay number is one of many of them.


291585134524
 
On Tue, 26 Jan 2016 14:00:18 -0000 (UTC), Cursitor Doom
<curd@notformail.com> wrote:

Given the shortcomings of low power battery testers/meters for checking
certain components that typically run at considerably higher working
voltages where any fault may only become apparent, has anyone any
thoughts on the utility, or otherwise, of these devices?

http://www.ebay.co.uk/itm/Transistor-Diode-Curve-Tracer-Component-Tracker-
Tester-Probes-BNC-Cables-/161294643173?
hash=item258de8efe5:m:miccP4BhvzYiDpcErFn7FDw
Click to expand...

Common commercial unit is the Huntron 'Tracker' with built-in display.
Can be of some use on production test bench, but doesn't replace
visual inspection and simple open/short or bias testing.

RL
 
On Tue, 26 Jan 2016 10:08:48 -0500, Ralph Mowery wrote:

This ebay number is one of many of them.


291585134524
Click to expand...

Thanks Ralph.
 
On Tue, 26 Jan 2016 10:28:21 -0500, legg wrote:


Common commercial unit is the Huntron 'Tracker' with built-in display.
Can be of some use on production test bench, but doesn't replace visual
inspection and simple open/short or bias testing.

RL
Click to expand...

Nice - but a bit pricey!
 
"Cursitor Doom" <curd@notformail.com> wrote in message
news:n893ri$8su$4@dont-email.me...
On Tue, 26 Jan 2016 10:28:21 -0500, legg wrote:


Common commercial unit is the Huntron 'Tracker' with built-in display.
Can be of some use on production test bench, but doesn't replace visual
inspection and simple open/short or bias testing.

RL

Nice - but a bit pricey!
Click to expand...

I keep a home made "octopus curve tracer" (two-lead type) on a dedicated
scope for the past 30+ years.

Absolutely WOULD NOT be without it.

Instantaneously find one bad amp channel out of many, very quick checks of
capacitance, inductance, resistance, diodes, fets, transistors, etc.

Once you get used to it and sort of "get it" as to what the device is
telling you, it will make you a better, faster technician.


Mark Z.
 
On Wed, 27 Jan 2016 06:24:46 -0600, Mark Zacharias wrote:

I keep a home made "octopus curve tracer" (two-lead type) on a
dedicated scope for the past 30+ years.

Absolutely WOULD NOT be without it.

Instantaneously find one bad amp channel out of many, very quick checks
of capacitance, inductance, resistance, diodes, fets, transistors, etc.
Click to expand...

And it's capable of testing these components at their intended working
voltages and currents? This seems to be the main shortcoming with almost
all the small battery powered testers.
 
"Cursitor Doom" <curd@notformail.com> wrote in message
news:n8bch7$fo6$6@dont-email.me...
On Wed, 27 Jan 2016 06:24:46 -0600, Mark Zacharias wrote:

I keep a home made "octopus curve tracer" (two-lead type) on a
dedicated scope for the past 30+ years.

Absolutely WOULD NOT be without it.

Instantaneously find one bad amp channel out of many, very quick checks
of capacitance, inductance, resistance, diodes, fets, transistors, etc.

And it's capable of testing these components at their intended working
voltages and currents? This seems to be the main shortcoming with almost
all the small battery powered testers.
Click to expand...

Mine uses a 6.3v AC transformer so no attempt is made to operate devices
under load.

mz
 
On Wed, 27 Jan 2016 20:46:54 -0600, Mark Zacharias wrote:

Mine uses a 6.3v AC transformer so no attempt is made to operate devices
under load.

mz
Click to expand...

But you still find that exposes every form of damage you encounter in
practice?
 
On Thu, 28 Jan 2016 06:46:59 -0600, Mark Zacharias wrote:

http://www.techlib.com/electronics/curvetrace.html

A sample curve tracer "octopus" schematic.

mz
Click to expand...

Thanks, Mark. I'll take a look on youtube see if I can find any tips on
how to use these under practical conditions to take in-circuit
measurements. I have more than enough scopes here with x-y/comp tester
inputs.
 
"Cursitor Doom" <curd@notformail.com> wrote in message
news:n8cv5k$3i4$3@dont-email.me...
On Wed, 27 Jan 2016 20:46:54 -0600, Mark Zacharias wrote:

Mine uses a 6.3v AC transformer so no attempt is made to operate devices
under load.

mz

But you still find that exposes every form of damage you encounter in
practice?
Click to expand...

I never said "every form" but it is a powerful tool.

Like oscilloscopes.

Like multimeters.

Like an esr tester. (Even though the "curve tracer" can give a quick check
of esr in many situations.)

It's usable in-circuit and once a person is proficient with it, can VERY
often cut troubleshooting time dramatically. (Test current is
resistance-limited, depends on exact schematic of the curve tracer. There
are many variations.)

We all have our favorite tools and little tricks to help us in what we do.

This is just one more.


Mark Z.
 
http://www.techlib.com/electronics/curvetrace.html

A sample curve tracer "octopus" schematic.

mz
 
We used to make those out of a 6.3 volt transformer and a couple of resistors.

Later I figured out a neater one for caps. You need a 1 KHz square wave of 400 mV with as close to 350 ohms source impedance as possible.

I can check caps with it from about 0.47 uF all the way up. If you can manage to, have the 400 mV square wave ride on 200 mV DC and it will also automatically detect shorts.

It is way faster than any ESR meter out there, even the old Wonderbox. Once you learn how to read it that is. And it is easier to see than almost any analog or digital display.

One of these days I plan on doing a writeup on it but I want to get a bunch of pictures depicting the readings on good and bad caps of a bunch of different values.
 
On Wed, 27 Jan 2016 00:43:30 -0000 (UTC), Cursitor Doom
<curd@notformail.com> wrote:

On Tue, 26 Jan 2016 10:28:21 -0500, legg wrote:


Common commercial unit is the Huntron 'Tracker' with built-in display.
Can be of some use on production test bench, but doesn't replace visual
inspection and simple open/short or bias testing.

RL

Nice - but a bit pricey!
Click to expand...

Hence the jig on offer. Just add your own uncommited oscilloscope...

You won't want to hook it up and disconnect it every time you need to
switch over.

RL
 
On Thu, 28 Jan 2016 16:40:00 -0500, legg wrote:

On Wed, 27 Jan 2016 00:43:30 -0000 (UTC), Cursitor Doom
curd@notformail.com> wrote:

On Tue, 26 Jan 2016 10:28:21 -0500, legg wrote:


Common commercial unit is the Huntron 'Tracker' with built-in display.
Can be of some use on production test bench, but doesn't replace
visual inspection and simple open/short or bias testing.

RL

Nice - but a bit pricey!

Hence the jig on offer. Just add your own uncommited oscilloscope...

You won't want to hook it up and disconnect it every time you need to
switch over.

RL
Click to expand...

Sounds like a useful addition to any test bench. I've probably already
got a suitable transformer lying around waiting for just such a project.
Plus no shortage of "uncommitted oscilloscopes." :)
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top