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Mine is out of alignment and Huntron's site has pdfs for the alignment of
units with serial number prefixes. Mine is an older unit without any
prefixes and I wonder if anyone might have those instructions and perhaps
a
manual copy?
tnx
hank wd5jfr
Haven't done alot of looking but you can buy a manual at
http://www.huntron.com/products/accessoryolder.htm
scrool down they have them for 1005b without serial prefixes.
Robert
VE3 something or other
"Henry Kolesnik" <wd5jfr@oklahoma.net> wrote in message
news:100trkg2p49uc9c@corp.supernews.com...
Mine is out of alignment and Huntron's site has pdfs for the alignment
of
units with serial number prefixes. Mine is an older unit without any
prefixes and I wonder if anyone might have those instructions and
perhaps
a
manual copy?
tnx
hank wd5jfr
Mine is out of alignment and Huntron's site has pdfs for the alignment of
units with serial number prefixes. Mine is an older unit without any
prefixes and I wonder if anyone might have those instructions and perhaps a
manual copy?
tnx
hank wd5jfr
Hi Hank,
How do you know your unit is out of alignment? They have virtually
nothing inside them that matters. If an open gives you a vertical
line, and a short gives you a horizontal, (45 degree on LOW) line, and
a diode gives you an "L", and a cap an "O", you are as good as it gets.
I would bet that your unit has the same pots in just about the same
locations as all of the 1005's.
Also, the 1005 is *supposed* to have the short circuit trace at a 45
degree angle when in the LOW position.
I have the manuals for my 1005, but it is a 1005B1S prefix 21F. The
manuals have enough staple bound, double sided pages that it would
cost me alot of time, and nearly $50 to xerox at the local Staples.
Sometimes, you have to look beyond the "market value" of an instrument
and see what the instrument will do for you that is of value. My
Huntron has paid for itself 1000 times over. I paid full freight for
my manuals from Huntron.
-Chuck Harris
Henry Kolesnik wrote:
Mine is out of alignment and Huntron's site has pdfs for the alignment
of
units with serial number prefixes. Mine is an older unit without any
prefixes and I wonder if anyone might have those instructions and
perhaps a
manual copy?
tnx
hank wd5jfr
I agree it's pretty simple but a little correct info would go a long way!
I don't know what high med and low pushbuttons are supposed to do?
I just tweeked a few unlabeled pots carefully to see what effect they
had....
And adjusted some that had the "right" effect...
With nothing connected I now get a horizontal line on high and med
but a 60
degree slanted one on low!
With leads shorted I get a nearly vertical line on high, med and low!
A 22mf cap gives a decent circle on high and med but a 60 deg. slant
line on
low..
A diode gives an L on high and med but a V on low...
(Please post followups or tech enquires to the newsgroup)Mine is out of alignment and Huntron's site has pdfs for the alignment of
units with serial number prefixes. Mine is an older unit without any
prefixes and I wonder if anyone might have those instructions and perhaps a
manual copy?
tnx
hank wd5jfr
Hi Hank,
High, Medium and Low are used to select the maximum voltage that is
applied to the device under test. All positions are harmless to all
known semiconductor devices.
When the probes are open circuited, you should see a perfectly
horizontal line in High or Medium, and a diagonal (corner to corner)
line rising from left to right, in the Low position. I stated this
incorrectly in my post.
When the probes are short circuited, you should get a vertical line
in all three positions.
If you connect to a low value cap, you will see an oval that is more
horizontal than vertical, if you connect to a higher value cap, the
oval will be more vertical than horizontal.
The patterns will change depending on the selection of High, Med and Low.
Try testing a zener diode. You will see that in the low position it
looks just like a diode, in the medium and high position, it will give
a zig-zag pattern.
It sounds to me like your unit is working just fine!
-Chuck
Ps, Please post and copy to my email! When people do that, I end up
writing two replies to the same post. If you want a personal reply,
then just use my email.
Henry Kolesnik wrote:
I agree it's pretty simple but a little correct info would go a long
way!
I don't know what high med and low pushbuttons are supposed to do?
I just tweeked a few unlabeled pots carefully to see what effect they
had....
And adjusted some that had the "right" effect...
With nothing connected I now get a horizontal line on high and med
but a 60
degree slanted one on low!
With leads shorted I get a nearly vertical line on high, med and low!
A 22mf cap gives a decent circle on high and med but a 60 deg. slant
line on
low..
A diode gives an L on high and med but a V on low...
The correct angle for the LOW setting should be whatever gives you aThanks for the tips, got the line from 60 deg to 45 degrees by tweaking
another pot...
That sounds correct. Nothing about the Huntron is absolute, onlyI tested a 30 volt zener and got a good Z but just got as small blip on one
leg of the z on a 56 volt zener
The actual voltages will be somewhat higher. The Huntron is a very highI measured the voltage on the probes, 60 Hz, hi: 40.5 volts, med 20.4 volts,
and lo is 6.6 volt.
Huntron is very specific to say that the Tracker CANNOT harm any solidSince these are rms, and peak to peak would be 2.8 higher,,
Does Huntron caution about testing any devices because of the voltage?
The early Huntron Trackers used parts that presented a fair amount ofWith a short all 3 levels show a vertical line but with an open high and
medium present a horizontal line while low presents a 45 degree line. Do
you know the reason for this?
I wish you wouldn't!hank
I posted a personal reply as well as to the groups as I figured others might
be interested.
Amazing....this machine can be duplicated with a scope and a small AC
power supply. All Huntron did was package it nicely and charge an arm
and leg for.
Circuits for this sort of gizmo were very common in the 70's and are
probably on the 'net
A quick Google search with the terms "circuit diagram curve tester
oscilloscope" found a number of interesting suspects. The one on
Agilent's scope is very nice...
John :-#)#
In the military we called it an OCTOPUS. For an example see:
Hi Hank,
Thanks for the tips, got the line from 60 deg to 45 degrees by tweaking
another pot...
The correct angle for the LOW setting should be whatever gives you a
line that goes from the lower left corner to the upper right corner of
the screen.
I tested a 30 volt zener and got a good Z but just got as small blip on
one
leg of the z on a 56 volt zener
That sounds correct. Nothing about the Huntron is absolute, only
relative.
I measured the voltage on the probes, 60 Hz, hi: 40.5 volts, med 20.4
volts,
and lo is 6.6 volt.
The actual voltages will be somewhat higher. The Huntron is a very high
impedance source.
Since these are rms, and peak to peak would be 2.8 higher,,
Does Huntron caution about testing any devices because of the voltage?
Huntron is very specific to say that the Tracker CANNOT harm any solid
state device, or other component. I would be worried about some of the
older Mosfets like the 3N128 which have no protection diodes built
in. But in a properly designed circuit, the circuit elements would
protect even a Mosfet.
With a short all 3 levels show a vertical line but with an open high and
medium present a horizontal line while low presents a 45 degree line.
Do
you know the reason for this?
The early Huntron Trackers used parts that presented a fair amount of
series resistance to the measurement circuit. This series resistance
wasn't visible in the High and Med positions, but in the Low, it would
have made a diagonal line on short circuit. The folks at Huntron must
have felt that it was more important to make a short circuit always
appear as a vertical line than it was to make an open always appear as
a horizontal line, so they added circuitry that allowed them to rotate
the display in the LOW position to make a short appear as a vertical
line.
In later Huntrons, they figured out how to null out this impedance and
those units always have a short vertical, and an open horizontal.
-Chuck
hank
I posted a personal reply as well as to the groups as I figured others
might
be interested.
I wish you wouldn't!
I check email a lot more often than newsgroups. I don't usually
notice that you have done this until after I have composed and sent
a response to your email. Then when I read the same question in the
newsgroup, and have to reply there as well. A lot of bother.
If you want the reply on the newsgroup, please don't send an email!
My last test was inductance and all I got was a straight vertical line till
I tested an 8.6 mH toroid, and it has to be on low. Both high and medium
show a short. On low it can barely detect a 4 mH toroid, it a vertical
ellipse with very little space between the lines. Anything in the specs on
the inductance limits for each range? How about capacitance?
I notice that newer units with prefix serial numbers have a couple of op
amps and a high freq oscillator so they must have more range and be more
sensistive than my unit with no op amps that I can see and the frequency is
60 cps.
Again tnx for going to all the trouble, it is appreciated.
hank wd5jfr
As far a the 3 ranges go, I can see them being usefull
"Chuck Harris" <cfharris@erols.com> wrote in message
news:40102D12.90405@erols.com...