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Re: recommended ESR meters these days

JJ
 

I have a Sencore LC-75 - love it!

John Justin


Re: capacitor testers OT

greenboxmaven
 

The Sprauge "Telohmike" condenser tester is one of the best ever made for condensers in tube circuit voltages. The general design was used by Heathkit and Eico, as well as at least one miltary version. They are very good for re-forming electrolytic condensers, you can easily monitor capacitance, leakage and ESR as the reforming proceeds. It's strange how Sprauge made an excellent instrument, but some of the worst condensers of all time. You don't need anything but your eyes to find a bad "Bumble Bee" or "Black Beauty" condenser, if it's there, it's bad. I know a few might still be good, but it's not worth risking a power transformer, scarce tube, or other components.

Bruce Gentry, KA2IVY

On 3/13/20 11:49 PM, John Griessen wrote:
On 3/13/20 12:57 PM, Bert Haskins wrote:
I also have a 70+ year old Heath "magic eye" capacitor tester that I
use for leakage tests.

I bought this when I was fifteen for use in repairing guitar amps.

It is still quit useful today.
I have a GR cap bridge with magic eye. I think mine needs some repair. I gave it a quick test when I got it
and seemed broken. What is that magic eye tube displaying on a cap tester? How does it differ from a meter
moved by a null detector amp?



Re: capacitor testers OT

Carl Hallberg
 

Hi all,
Be careful using a magic eye cap tester.  The older capacitor testers were made in an age when the voltage ratings where higher then our present solid state circuit capacitors.  Very easy to ruin a capacitor.
As far as the newer e.s.r. testers, I destroyed mine because of a charge on the capacitor.  I did read the previous comment on a tester that discharges the cap before testing.  Guess I need one of those, but I did build one using two back to back diodes to prevent this.  Can't add the diodes to newer testers because would be part of the D.U.T. (device under test).
Carl Hallberg (W9CJH)

On Saturday, March 14, 2020, 12:57:49 AM CDT, Bob Albert via Groups.Io <bob91343=yahoo.com@groups.io> wrote:





Wow that's beautiful!  I see it uses a 6E5 tube.  It covers a wide range.  Does yours work?  Is the eye tube bright?  What is the capacitance resolution on the lowest range?
Bob
    On Friday, March 13, 2020, 09:44:09 PM PDT, John Griessen <@jgriessen> wrote:

On 3/13/20 11:18 PM, Bob Albert via Groups.Io wrote:
  It's just a null detector.  That must be a very old model; I don't recall  GR using an eye tube.
Like this:    https://cibolo.com/forsale/box_LG25-C1.jpg
type 1611-B


Re: capacitor testers OT

Bob Albert
 

Wow that's beautiful!  I see it uses a 6E5 tube.  It covers a wide range.  Does yours work?  Is the eye tube bright?  What is the capacitance resolution on the lowest range?
Bob

On Friday, March 13, 2020, 09:44:09 PM PDT, John Griessen <@jgriessen> wrote:

On 3/13/20 11:18 PM, Bob Albert via Groups.Io wrote:
  It's just a null detector.  That must be a very old model; I don't recall  GR using an eye tube.
Like this:    https://cibolo.com/forsale/box_LG25-C1.jpg
type 1611-B


Re: capacitor testers OT

John Griessen
 

On 3/13/20 11:18 PM, Bob Albert via Groups.Io wrote:
It's just a null detector.  That must be a very old model; I don't recall  GR using an eye tube.
Like this: https://cibolo.com/forsale/box_LG25-C1.jpg
type 1611-B


Re: capacitor testers OT

Bob Albert
 

It's just a null detector.  That must be a very old model; I don't recall  GR using an eye tube.
Bob

On Friday, March 13, 2020, 08:49:58 PM PDT, John Griessen <@jgriessen> wrote:

On 3/13/20 12:57 PM, Bert Haskins wrote:
> I also have a 70+ year old Heath "magic eye" capacitor tester that I use for leakage tests.
>
> I bought this when I was fifteen for use in repairing guitar amps.
>
> It is still quit useful today.

I have a GR cap bridge with magic eye.  I think mine needs some repair.  I gave it a quick test when I got it
and seemed broken.  What is that magic eye tube displaying on a cap tester?  How does it differ from a meter
moved by a null detector amp?


capacitor testers OT

John Griessen
 

On 3/13/20 12:57 PM, Bert Haskins wrote:
I also have a 70+ year old Heath "magic eye" capacitor tester that I use for leakage tests.

I bought this when I was fifteen for use in repairing guitar amps.

It is still quit useful today.
I have a GR cap bridge with magic eye. I think mine needs some repair. I gave it a quick test when I got it
and seemed broken. What is that magic eye tube displaying on a cap tester? How does it differ from a meter
moved by a null detector amp?


Re: recommended ESR meters these days

mr.fabe
 

ESR / Capacitor Tester Recommendations (Price - Lowest to Highest)

MESR-100v2 - Lightweight, short short leads, low cost, ESR only. It's cheap and feels cheap.

Anatek Blue ESR Meter (Bob Parker Design) - Popular, kit or pre-built , multiple probe options, no capacitance reading.

Peak Atlas ESR70+ - Shows capacitance and ESR values, discharges caps up to 50V, multiple probe options. Has calibration options but why spend the money.

Capacitor Wizard - Adjustable sensitivity, high cost, no capacitance reading.

DE5000 - Popular favorite portable LCR meter.

Keysight U1731, U1732, U1733C) - Best portable LCR meter at a high price. Can be calibrated.

Sencore LC 75,76,77,101,102,103) - Does ESR and full capacitor and inductor testing. The LC103 does in-circuit testing as well. Can be calibrated.

I have the MESR, ESR70, U1733C, and LC103 models but use the ESR70 and U1733C mainly. The ESR70 is small unit that’s easy to use in-circuit and out of circuit. Slap on a set of needle probes and it performs wonderfully. Very handy having a capacitance reading in addition to the ESR when checking caps.

Check the reviews / demos on YT for all the features testing and use of the models above.


Re: recommended ESR meters these days

Carsten Bormann
 

On 2020-03-12, at 22:57, ArtekManuals <manuals@...> wrote:

Anyone bought one _*RECENTLY *_that they can recommend or warn me away from?
For something completely different, try a tweezer form factor.
(With a couple of good alligator clip leads, this is useful for many larger components, too.)

I like the MS8911 from Mastech, about €40 shipped.
Can do 100 Hz to 10 kHz (no 100 kHz, though).
Particularly useful in 0.1 Vrms mode: this allows some in-circuit measurements other instruments can’t do.

Don’t confuse this with the cheaper MS8910, which is decidedly meh.
(If you want something simple at the MS8910 price point, try the $18 HoldPeak HP990C a.k.a. HP-4070C. Really handy for component testing, including diodes and zeners up to 24 V, and the occasional loaded [lo-Z] voltage measurement.
None of these $20 instruments do ESR, IIRC.)

The MS8911 is not a replacement for my DE-5000, but really handy — my goto LCR meter.
(There are other tweezers at $200+, no idea what I would use those for.)

[1] looks at the MS8911. He also likes the full-size MS5308; I don’t have experience with that.

The $5 (+ battery) transistor tester thingies (e.g., LCR-T4) are surprisingly useful, too, by the way. The $18 LCR-TC1 with its nice case, rechargeable battery (and an IR remote control tester thrown in for good measure) is another one of my goto “instruments”, mostly for semiconductors, but it can do a capacitor as well.

Add a HP 4329A (or Keithley 616) for leakage testing, and you have some pretty good diagnostic capability.

Now if anyone knows a meter that can characterize SRAM backup super capacitors (say, 0.22 F, 50 kΩ ESR (!)), I’m all ears...

Grüße, Carsten

[1]: https://www.youtube.com/watch?v=96XTelPZnfA


Re: Tek video: A Precision CRT (1955)

Paul Amaranth
 

I liked the mechanical calculator; we had one of those in the lab when
I was back in college. Also the analog simulation to map out the
electrostatic fields was very clever. The amount of skilled hand
work was absolutely amazing.

It was also clear that most, if not all, of the equipment was shop-built.
Nothing off the shelf back then. Working in their engineering shop must
have been great fun.

Paul

On Fri, Mar 13, 2020 at 03:16:22PM -0700, John Williams wrote:
Wow that is amazing. Not only the actual building process but the design and engineering that went into it. It interests me to see how little protection for the workers was required in those days. I didn’t see anyone using gloves, eye protection or breathing protection. How different that would be today. I did note that the fellow soldering the base wires in place did have several bandaids on a few fingers. I also noticed the use of a primitive computer. I think it was called a “slide rule.” Thanks for the link.





!DSPAM:5e6c0641208681337424733!
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Aurora Group of Michigan, LLC | Security, Systems & Software
paul@... | Unix & Windows


Re: Tek video: A Precision CRT (1955)

stevenhorii
 

For precision CRTs, it's hard to beat the high-resolution CRTs made for
film recorders in the days before laser light sources for these. Film
recorders made by Celco were used to convert digital imaging to film for
movies. These tubes were not designed to display a whole image at once. The
spot size was on the order of 1 micrometer. Celco even built special tools
for the characterization of CRT spot size. The spot was scanned across the
phosphor face one spot at a time for exposure on the film. For color, a
color filter was used and three exposures made. Deflection was magnetic and
precision deflection coils were made. The innards of the Celco recorder was
basically an optical bench. Though I describe what I know about the Celco
unit it is because I had one, not because I have any financial interest in
the company or worked for them. I believe the CRTs were built by Litton.
Anyone else ever work with these?

On Fri, Mar 13, 2020 at 6:16 PM John Williams <books4you@...> wrote:

Wow that is amazing. Not only the actual building process but the design
and engineering that went into it. It interests me to see how little
protection for the workers was required in those days. I didn’t see anyone
using gloves, eye protection or breathing protection. How different that
would be today. I did note that the fellow soldering the base wires in
place did have several bandaids on a few fingers. I also noticed the use
of a primitive computer. I think it was called a “slide rule.” Thanks for
the link.




Re: Tek video: A Precision CRT (1955)

John Williams
 

Wow that is amazing. Not only the actual building process but the design and engineering that went into it. It interests me to see how little protection for the workers was required in those days. I didn’t see anyone using gloves, eye protection or breathing protection. How different that would be today. I did note that the fellow soldering the base wires in place did have several bandaids on a few fingers. I also noticed the use of a primitive computer. I think it was called a “slide rule.” Thanks for the link.


Re: recommended ESR meters these days

David Holland
 

On Fri, Mar 13, 2020 at 1:57 PM Bert Haskins <bhaskins@...> wrote:

I'm really quite surprised that no one has suggested the Arduino-based
component testers like the LCR-TC1 for this.
I suspect that BSIDE ESR02 Pro Reginald mentioned is one of those. Its
just in a nicer case than the usual ones, and includes a manual method for
discharging.

See
https://www.eevblog.com/forum/testgear/bside-esr02-pro-transistor-tester-(teardown-quick-test)/

I ordered one off Amazon just today... I guess we'll see when it gets
here...

David


Re: recommended ESR meters these days

 

Hi tgerbic,

I am impressed by your attitude of building an instrument yourself with readily available parts and near zero cost. This is the engineering spirit I have cultivated all my life too.

So, inspired by your post, I just built myself an ESR meter WITH ONE RESISTOR.
I was helped in this by my newly repaired 547 oscilloscope with a newly acquired 1A4 tool module, and a FG502 function generator that I had stored away for many years.

I applied on a 1 ohm test resistor a 100 kHz sine wave 10 Vpp offsetted positive from the function generator, through a 1K ohm resistor,
and I was able to observe on the oscilloscope set to 10 mv/div a 10 mVpp signal on the resistor. I could easily resolve this signal to a tenth of a division, or 0.1 ohm.

And so I measured in the same way an ESR of 0.7 ohm on a 470 uF 400 V electrolytic, and 0.1 ohm on a 220 uF 50 V one, both acceptable values.

I haven't tried, but I am confident that I can use my "meter" on any electrolytic cap in situ on a disconnected piece of equipment.

Regards,
Ernesto


Tek Manuals Posted

KL7AM
 

These are NOT my manuals and I have no connection to the seller

Marty
KL7AM


Tek Manuals-QRZ.COM

KL7AM
 

On QRZ.com
New


Factory manuals in good to excellent condition. Punch bound with heavy front and back covers.

546 Oscilloscope Inst Manual (2ea)

Type L plug-in inst

Type CA plug-inst

1A2 Plug-in inst (re-print; no covers; this book only)

496/496P Spectrum analyzer service manual vol 1(2 ea)

496/496P Spectrum analyzer service manual vol 2 (2ea)

496/496P Spectrum analyzer OP manual

5” oscilloscope camera system inst manual

Buy 1 manual $6 plus shipping

Buy 2 or more manuals, $5 each plus shipping

Buy them all $40 plus shipping

Hate to send them to the landfill.

My contact info is good on QRZ. Text or phone 701-5 four one-3 four one one.


Re: recommended ESR meters these days

Bert Haskins
 

I'm really quite surprised that no one has suggested the Arduino-based component testers like the LCR-TC1 for this.

I have a desktop ESR meter that I very seldom use since the component tester is battery-powered and more convenient.

I also have a 70+ year old Heath "magic eye" capacitor tester that I use for leakage tests.

I bought this when I was fifteen for use in repairing guitar amps.

It is still quit useful today.

-- Bert


Re: recommended ESR meters these days

ArtekManuals <manuals@...>
 

I may yet buy another DE5000 (or 6000) but I am wary since the last one which saw very little actual "on time" died sitting in the cabinet after less than 5 years.."Fool me once....yadda yadda yadda"

Dave
manuals@...

On 3/13/2020 12:24 PM, G Hopper wrote:
Dave,

Since this thread has revived my interest in a portable ESR meter (I have a
benchtop one) I'm wondering if there is any reason you'd choose not to
replace the DE-5000 with a new one, or the apparent new model DE-6000?

Grant
KB7WSD

On Fri, Mar 13, 2020 at 9:16 AM ArtekManuals <manuals@...>
wrote:

I did try probably have over 10 hours invested in that. Given the value
of my time ( which at 73 goes up every day ...supply and demand) easily
twice what a new one will cost... Maybe with a new on in hand I can
compare... I really liked the DE-5000 with the exception that the
display back-lighting which was very hard to read and adjust..Probably
a bad cap in there somewhere ( wink)

Dave
NR1DX`

On 3/13/2020 7:07 AM, amirb wrote:
Dave
people have suggested a lot of capacitance/ESR meters but may I ask why
dont you try to fix the DER DE-5000 that suddenly died?
it could be an easy fix really. DE-5000 is one of the best handheld
tools and so far it is the best that has been suggested by people here
(except the bench top ones)

On Thu, Mar 12, 2020 at 05:57 PM, ArtekManuals wrote:

Took out my (apparently not so) trusty ESR meter the other day and it
eyes had rolled back in its head and no amount of CPR would revive it..
Anyone bought one _*RECENTLY *_that they can recommend or warn me away
from?
Dave
manuals@...

--
Dave
Manuals@...
www.ArtekManuals.com


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Re: recommended ESR meters these days

G Hopper
 

Dave,

Since this thread has revived my interest in a portable ESR meter (I have a
benchtop one) I'm wondering if there is any reason you'd choose not to
replace the DE-5000 with a new one, or the apparent new model DE-6000?

Grant
KB7WSD

On Fri, Mar 13, 2020 at 9:16 AM ArtekManuals <manuals@...>
wrote:

I did try probably have over 10 hours invested in that. Given the value
of my time ( which at 73 goes up every day ...supply and demand) easily
twice what a new one will cost... Maybe with a new on in hand I can
compare... I really liked the DE-5000 with the exception that the
display back-lighting which was very hard to read and adjust..Probably
a bad cap in there somewhere ( wink)

Dave
NR1DX`

On 3/13/2020 7:07 AM, amirb wrote:
Dave
people have suggested a lot of capacitance/ESR meters but may I ask why
dont you try to fix the DER DE-5000 that suddenly died?
it could be an easy fix really. DE-5000 is one of the best handheld
tools and so far it is the best that has been suggested by people here
(except the bench top ones)


On Thu, Mar 12, 2020 at 05:57 PM, ArtekManuals wrote:

Took out my (apparently not so) trusty ESR meter the other day and it
eyes had rolled back in its head and no amount of CPR would revive it..
Anyone bought one _*RECENTLY *_that they can recommend or warn me away
from?

Dave
manuals@...

--
Dave
Manuals@...
www.ArtekManuals.com


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Manuals@...
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Re: recommended ESR meters these days

ArtekManuals <manuals@...>
 

I did try probably have over 10 hours invested in that. Given the value of my time ( which at 73 goes up every day ...supply and demand) easily twice what a new one will cost... Maybe with a new on in hand I can compare... I really liked the DE-5000 with the exception that the display back-lighting which  was very hard to read and adjust..Probably a bad cap in there somewhere ( wink)

Dave
NR1DX`

On 3/13/2020 7:07 AM, amirb wrote:
Dave
people have suggested a lot of capacitance/ESR meters but may I ask why dont you try to fix the DER DE-5000 that suddenly died?
it could be an easy fix really. DE-5000 is one of the best handheld tools and so far it is the best that has been suggested by people here (except the bench top ones)


On Thu, Mar 12, 2020 at 05:57 PM, ArtekManuals wrote:

Took out my (apparently not so) trusty ESR meter the other day and it
eyes had rolled back in its head and no amount of CPR would revive it..
Anyone bought one _*RECENTLY *_that they can recommend or warn me away from?

Dave
manuals@...

--
Dave
Manuals@...
www.ArtekManuals.com


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