#91 Electrolytic capacitors and its LEAKAGE current and how to test
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- čas přidán 27. 07. 2024
- Cap caps caps and no end :-) I n this last episode about electrolytic capacitors we need to focus on the leakage current and how we test it.
In this earlier episodes we focused on some other important parameters of electrolytic caps..
1. General infos: • #76 Tutorial: Why do e...
2. Parameter testing methods: • #83 LCR's meter D, Q, ...
3. ESR test: • #89 Kenwood TS-850 for... - Věda a technologie
Excellent video, this topic is the most important for me, another little thing that I have found which is also just as important is keeping a stockpile of capacitors, which we all do! But after a while they start to kinda die off. They are not dead but more like in a coma! It's nice to have plenty capacitors in stock because waiting for new capacitors to show up is a pain and it kills motivation. The problem that I have found is that when we have had capacitors sitting around waiting for the next job, we don't really test them before we put them in!
I know what people think about reforming capacitors but I have found that if you take the time to put a voltage on them, start low and slowly bring up the voltage a step at a time, you can wake them up and they will be restored to their new condition, but if you just put it in circuit, they get a shock and begin to heat up which really shortens their lives, sometimes they even explode!
I went through a phase some time ago where I was just buying capacitors! I don't know why but I just loved all the different sizes, colours, styles and shapes. I realized that something was wrong when I was looking for a capacitor with low ESR and leakage and I just couldn't find one in my stock! So I began to systematically go through everything that I had and it looked like 95% had gone bad! I have a lot of capacitors LoL..
So I tried to reform a few and they actually started to wake up!
So what I have learned is that Capacitors should be checked before they go in circuit, if you reform them slowly before, they will give a long service life and if you don't, they will heat in circuit and vent their electrolyte as a gas, sometimes two or more hours later depending on how quickly they heat.. So yeah, it's just something to keep in mind, especially if you hoard capacitors like me. And non of them were purchased as new old stock! They were all new modern electrolytic capacitors...
The only thing that I really need now is a capacity tester that can read 10,000uF and larger capacity... The testers that I have can't do it, I keep larger values for amplifier power supplies but the cheap testers can't measure it... I guess that I have no choice but to spend more money on something that can...
Anyway, great in-depth video. Thank you very much.
Awsome focus with the cam great job.So much info for a newbe like myself. Thank you for your time.
Peter.....thank you...I learn so much from your videos.
vielen Dank!
Great video on testing leaky capacitors and related issues. Maintains a good balance between thoroughness and breadth and the necessary practical advice.
Thank you glad that you like it..
Nice vídeo and description of how caps work, thanks Peter, for another one.
+Nuno Lopes Hi Nuno, thanks a lot for watching and comment. 73
Very nice capacitor supplemental video in regards to leakage current testing Peter! I love your methods in testing and explanations. They are very well received and understood by us out here in CZcams land.
Thanks,
and very much appreciated
73s
Tom
+AntiqueRadioandTV Hi Tom, thanks for your kind words I'm glad that my explanations are easy to understand! Again thank you! All the best and 73's
Thanks Peter for a great video about ESR values on capacitors. I do a lot of work on vintage 27mHz CB radio's, and most are ok there is a lot of radio's with Electrolytic Capacitors well out of spec. I don't always Recap a radio unless I find more than 10% of the capacitors out of spec. Then I will do a bulk recap of the radio. I recap'ed a Uniden AX144 with PC833AE board in the set. After the recap, the radio worked like it was brand new. It's build date was February 1983. I been using the radio for 1 year now and it sounds great on air and has great RX as well. The bulk recap was worth the time. I use a ESR meter, capacitance meter and my DVM for current leakage before replacing Electrolytic Capacitors. My rule I work with is back in the 1980's the capacitors were not made as well as they are today, and with the unknown health of these old radio's after 30+ years the caps are going to be stuffed. To get the best out of these radio's a full recap makes sense.
Ah very good! Thanks for your report and thanks for watching All the best
Good explanation and demonstration of leaky caps. Back in the tube days most electronic shops had capacitor analyzers. They were tube type and most had a "magic eye" tube. Most could supply between 500-600VDC for checking leakage current. I did a video a month or so ago on a Semcor (not Sencore) tube type capacitor analyzer. Even old analyzers like that were very accurate if properly calibrated.
Mike
+MikesRadioRepair Hi Mike, thank you! Yes right now I remember you have told me before and I wanted to watch it. Now I will go over to your channel and watch it...Shame on me I have forgotten it sorry. All the best and again thanks for stopping by. 73
Thanks for sharing. I can see a leakage test as a good test before installing new caps (especially if they have been in your drawer a while). If I remove a capacitor from a old piece of equipment, though, I am apt to just replace it as a matter of course. Most caps are relative cheap, unless you get into the bulk caps on quality old linear power supplies, etc.
I think I need one of those DER EE testers first... then later a leakage tester.
Thanks again for all your videos. Great channel!
+PelDaddy Hi, yes I agree always if you install a new one out of your drawer, oe during troubleshooting. And of course then swap the old caps out. Thanks for watching 73
Great video Dear Peter...
thanks a lot for this excellent efforts.
+MTS Thank you
Very nice explanation as always Peter. I can always pick up some good tips from you. Thank you
Regards
John
+orbiter8 (John) Hi John, I'm glad to hear that my videos are helpful! Thanks for comment. All the best
Thanks for another great video Peter! You are one of my favorite channels on electronics on CZcams. 73's de KA2ZOH
+Herbert Susmann Hi Herbert, thanks for the kind words and thanks for stopping by 73
great video
you and Paul and Buddy are the best never miss one
+DENNIS N Hi Denny, thanks you! I'm always glad to see you. All the best and 73
Fantastic, go on with your nice mission !!!!Thank you very much.
Thanks for watching Nikola...73
Thanks much Peter. You're the best!
+jerry blood Thanks you very much Jerry!
Nice one Peter big thumbs up
Thank you Allan 73
Thanks for the nice lesson, Peter.
+Robert Calk Jr. Thank you Robert.
Great Job Peter. Nice Chart :)
+Grant Fullen Thank you Grant!
Thanks so much I learn so much from your video's! You are English is always very easy to listen to and easy to understand!
Glad that you like it! Thanks for watching 73
Thanks Peter for another great tutorial on capacitor leakage. Very well done and great explanation. Also thanks for letting us see all those different capacitor testers you have. nice collection there my friend. I have found that a lot of the cb radios here it is best to replace all caps due to the quality of the ones used. Yes you have to take care in doing so not to cause other faults. One solder bridge can lead to a lot of extra work.. But equipment that uses good grade caps I do not replace all. Only the faulty ones. As always Peter thanks for another great video. 73
+The Radio Shop Hi Buddy, thank you for your kind words! Yeah my little collection helped me out very often :^) Well I totally agree that it is best to replace all caps in those cb radios as that is a kind of restoration so no doubt you are right. Working on troubleshooting I prefer really watching out for the problem and then if needed I replace all the caps as well.. Thanks for stopping by my friend 73
Great video Peter! I like that little isotest meter. The Sencore is a nice machine as well.
+Mr Carlson's Lab Thank you Paul. Yes my isotest is a neat little device for quick checking ...73
@@TRXLab Hi Peter,
Excellent video, thank you.
Question: could one use a "megger" or digital insulation tester instead of the Isotest instrument? Is that the same thing?
Also: why can't you use it for electrolytic caps, if you follow the polarity?
Cheers
Mark
I think I know you. Yes I know You Sir Carlson's. I follow your videos as well and I watch your videos repeatedly :-)
Sorry to be so offtopic but does someone know of a trick to log back into an instagram account..?
I was dumb forgot the password. I appreciate any help you can give me.
@Vihaan Maximilian instablaster ;)
TNX for yet another great video ! I have the Sencore LC101 and its chart differ from your Sencore. I am glad that the manufacturer are following the one standard now !
73 N8AUM
+vidas v Hi Vidas, thanks for the feed-back! Well the LC101 is a newer unit and I think they have already adapted the changes. But you are right it is good to have a standard nowadays. 73
Another great video Thank you
A very helpful video, thank you :)
+Róbert Valdimarsson Thank You Robert 73
I been using many ESR meter for years and I have 3 on the top of my list.
GME-236
ESR70 Peak Atlas
Dick Smith ESR meter
Best Regards.
Thank You for the great video!
You are welcome! Thanks for watching Cheers
Thankyou for explaining the new capacitor standard. I guess esr is not as important after all. The most important test is the leakage test under full load and use the current publication from capacitor manufacturer data.
excellent ! Makes a lot of sense to do that testing first.
Thanks for watching Andy 73
Very good video. Though these high-voltage DC bench PSUs are not that common. For a 200V type, I'd just use an adjustable transformer, bridge rectifier along with some smoothing and current limiting and call it a "power supply for high voltage capacitor testing".
Great video Peter, I tried to build a similar chart with excel but using exponents is a challenge to format. Would you be willing to post you spreadsheet?
Thanks for this reference. Subscribed ;)
Thanks for feed-back and for sub Cheers
Thanks for all the info.. Appreciated. Could you tell me where I can find a copy of your charts at the end of your video? Thanks in advance.
Hi Peter,
Good video indeed. But for High voltage electrolytics, you can use (after checking their caps) units as the Heathkits IT-11 or 28. They are able to test for microamps leakages.
73'S Alain
+Alain Alfa Hi Alan, thanks for feed-back! Well with my Sencore I'm able to test up to 600V and can read the leakage down into the nA area... 73
Hi. which one you think is the best instrument, this or the MSR100 V2.
Thanks for the nice explanations you have given us. Finally I was missing the formula ,once again, at the end of the very interesting description and I think it was: factor 0.01x capacitor in microfarad x voltage in volts equals micro current in value as a result of the leakage current?
Yes the formula is right. Thanks for watching Cheers
Thank you for your capacitor characterization videos. You did an excellent job covering electrolytics. I’m sure you will agree that heat, whether from the operating environment or from ripple current, plays a very significant factor in the degradation of electrolytic capacitors. I was wondering if you have developed a quantitative test procedure for determining capacitor aging? If so, does the test provide a useful estimate of the cap’s EOL? Thanks … D.R.
+Donna Ray Hi Donna, thank you for feed-back! Yes I fully agree heat is playing in important role. That is shown in my video #76 and as well the ripple current...No it is difficult to estimate caps EOL as the chemistry and the physics is to different but the data sheet will give an indication of duration time... Hope that answers a bit your question. All the best and Cheers!
Very nice, Peter. Can you post a link to a pdf or jpg of your current chart for max leakage current?
peter thanks for all the excellent video clips of your work. i don't repair my own equipment and never will but that doesn't mean I don't enjoy learning. Mike of Mike's radio repair does all my work for me. I have a question for you Peter, what do you think about hf's being used on 11 meters (in the US? I ask because I know that your Clips or at least the ones that I've seen all have to do with hf's being used as they are intended (on amateur bands).
+4Q2 42Q Hi. I'm not entirely sure if I understood your question right but I love all kind of radios as well 11m radios. There is nothing wrong with it and I have done repairs and tutorials on and with 11m radios as well. Thanks for watching my videos. All the best and 73
is it possible to measure leakage current in circuit - so without unsoldering it?
I know its impossible to measure capacitance...
Really magic! This is German precision!!! Best regards!
LOL, okay very kind! Thank you 73
Dear friend! Please continue with your episode,because is really fantastic. If you please,send me your e-mail,i have some question about .
can capacitance and esr test ok and still fail the leakage test?
Peter, do you have the operating manual and/or schematics for the sencore ca55?
I can't seem to find them anywhere.
+Doctor Forbin Hi, sorry no I don't have a manual. It has been lost.
Excellent video peter. Where did you get the figure on pure cap to equivalent?
+Doctor Forbin Hi not sure if I got it right the figures are calculated with the formula written in the spec sheet.
The insulation tester that I have at job delivers DC, up to 1000 volt. I'm not familiar with your Isotest model, but it would make sense that it delivers DC as well, which it make it useful even for electrolytic capacitors, in absence of a dedicated tester like Sencore.
Yes for leakage check you need DC only...Thanks for comment 73
At 14Min52sec the black strip on the non polarity (old /new stock capacitor) shows which side is the outer plate so that side should be conncted to ground in order to lower noise interference. Not as you name it lower impedance side. This kind capacitors are made of 2 Aluminium foils rolled when connecting the outer side to ground it protects the inner side from being exposed to electromagnetic induction. if outer foil connected to signal path noise level will increase significantly.
Peter, what instrument do you recommend for testing leaky caps?
+Doctor Forbin Well I think this sencore meters are quite neat ....new meters are much to expensive.
you can use a standard multi metre to check for leakage
just use amperage setting,
capacitors have a CV value
excelent vedio dear
+ubuntu server Thanks for feed back and for watching! Cheers
Hi Very interesting your video. I am interested in acquiring the isotest 6 but i have not found it on the internet. Do you know a link or webpage where i can buy it?. Thank you.
Hi Vladi, you can't buy it as it was a home-brew project of radiomuseum.org years ago. Thanks for watching 73
Peter aound the 7:00 mark there is a schematic.
Is that from the spec sheet?
+Doctor Forbin Ah okay now I have got it... Here is the link www.nichicon.co.jp/english/products/pdf/aluminum.pdf
Hi
Thank for a very useful/interesting video.
Much appreciated.
Can I point out a small error, 31.34min:
You said 63uF instead of 63uA.
Best regards
Jo
Thanks for feed-back Jo. Cheers
Dear sir, thanks, but can you give us the table? Please?
ok I missed it where did you get the chart ? ps great video added you to one I will be following
Simply search for it on the internet. Many different available...73
Very good video and also caught the others as well. What I need is your idea having a chart makes it so easy to get that leakage number so seems I am not looking right place for one, could you send me a link to a good one that could use a ref? 73's
Thanks Dale. Send me you e-mail to provide you with the table 73
yes , QRZ me wb8woj its good
Hello Peter, does you know, how the industry tests the leakage of capacitors?
73 aus dem Schwabenland.
www.maxwell.com/images/documents/1007239-EN_test_procedures_technote.pdf
Hi, which meter for testing ESR would be good for me to buy considering I have a very small budget? I noticed in video #81 that you were using the MESR100 but sometimes you have changed to the DE5000. The MESR100 is reasonably priced on Ebay at around $49 while the DE5000 is about $160 with probes. Is one of them better than the other? The MESR100 costs more with the SMD tweezer clip but it is cheap to buy just the clip for only a couple of dollars. I already have a meter that measures capacitance and leakage so I just need one for ESR in circuit using the SMD tweezer clips. Thanks.
Steve the DE5000 is the cheapest option to do real testing the MESR 100 can't compete. If you need ESR only well try it. 73
I have a lot of equipment with those dreaded little SMD capacitors that are likely to be going bad that I need to check and probably only need in circuit ESR testing with the tweezer clips. The MESR100 is cheapest on Aliexpress and will be on sale for $45 on the 11th of this month!
very good go for it 73
On the budget end this unit seems quite promising:
www.ebay.co.uk/itm/181845966127?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Thanks but I wanted one that could test in circuit so I got a MESR100.
Thanks ! can you share the table you have made maximal eleckstrome fur elkos
+Ajay Rao Hi Ajay, no problem but as long I have no web space I need your e-mail..Thanks and 73
+TRXBench my email ajayrao69@gmail.com Best Regards
+TRXBench Thanks alot for email Best Regards
Thanks.
Thank you Ian 73
Yeah but what if we're working on old circuits? Then the old spec should still be good enough.
Hi Peter. This video made me think about to build a simple Leakage tester myself that can test up to ~400V
1st 230v -> ~6V transformer
2nd Voltage multiplier with Steps 6,12,24,48,96,192,384V build with some 2KV Caps and Diodes
3rd Switch between the Steps
4th Some kind of current limiter perhaps a simple 1.5M Resistor
5th An analog 0-250 µA Meter
6th some Button to charge discharge the capacitor and bring down the voltage safely over a discharge Resistor
Do you think that would work?
73,
DK3JF Jörg
Hallo Jörg., das hört sich alles machbar an so wie du es beschreibst. Also warum nicht. Viel Spaß mit dem Projekt. 73
+TRX Bench Could you not measure leakage current with a high-voltage DC PSU and a quality DMM (I prefer the Fluke bench DMMs); even If you don't have a unit with the capabilities of the Sencore CA-55 (many hobbyists won't)? Even my old but still quite accurate Fluke 45 DMM has a DC Current resolution as low as 100nA, on the 10mA range. And, my Fluke 8050a has a resolution of 10nA on the on the 200µA range.
Hi Ken, of course you can Test it with a high Voltage dc psu and a good meter. 73
This works quite well with the large film caps. But, small film caps require a meter capable of pA or even fA. Electrolytics require quite a long time for the meter to settle to a final result. I suppose this is due to the time required for oxide film formation?
please turn on english closed captions.
If a capacitor checks out for good ESR, Capacitance and Dissipation, can it still be leaky? When would you suspect leakage is too high?
+Digger It can be leaky. A dead shorted cap will show best ESR and maximum leakage.
mamoynas Thanks, but if it's shorted then the capacitance measurement would be off or non existent wouldn't it?
Digger D
yes you are right. I was refering on ESR meters that's why. But most capacitance checkers apply a limited voltage across the cap and capacitance readings can be 10% or more Off, but that does not mean leakage nessesarily. Leakage will be more evident closer to the cap's voltage rating. It may hide from just a capacitance check. Correct way to check for leakage is leave the cap close to its rated voltage for 2-5 min and then measure the leakage and so on. Keep in mind that different caps have different specs also, so a cap that has more leakage (new from the factory) than another might not be suitable to your application.
+Digger D p.s. a fast way to suspect leakage is that since current is passing through the cap, the cap will be heated more than others in the neighbourhood. Another giveaway is excessive ripple. Caps are funny things, i had one that was giving "spikes" of leakage current over a period of time and not all the time.
+Digger D Hi, I guess you already have all the needed answers so thanks for watching 73
Super "cap" info !!! Sub, paw & Thank You ! :-)
Thank you
The values smaller than 3µA are wrong. The datasheet said the formula or 3µA whichever is greatest.
Hmm, I thought in fact it is not really the leakage *current* that keeps your electrolytic capaitor healthy but it is the voltage that helps to form and maintain the oxyde film on the aluminium, or am I wrong? I thought, the current would just lead to the electrolyte building up gas pressure.
+Slartibartfas042 Hallo, na ja es ist eine Mischung aus Strom und Spannung. Ohne Strom lässt sich ein Kondensator nicht formieren. Aber es ist richtig das Oxyde wird "gewartet". Deshalb verändert sich ja auch die Kapazität nach einer Formierung. Ich bin kein Chemiker, aber hier gibt es gute Berichte von erfahrenen Fachleuten. www.radiomuseum.org/forum/elkos_neu_formieren.html und auch hier www.radiomuseum.org/forum/ueberkapazitaet_von_kondensatoren_schdlich.html#post146041. Vielen Dank für den Kommentar. Alles Gute bis bald
+TRXBench Aaah! Danke für die sehr informativen Videos und auch für die Links - ich freue mich über jede ernstzunehmende Quelle für Informationen, schließlich lernt man nie aus - selbst als eigentlich "alter Hase"! ;-)
73!
I built a simple circuit that will measure leakage current. I test the cap at it rated voltage.
Nice! When i was building my own capacitor leakage tester i had to determine the NORMAL leakage values, so i searched in books and web. The various equations i found , i put in an excel sheet that can be downloaded here drive.google.com/open?id=0B5klmbaH0rOAUlRHelZzVjRjSEE . Now it seems that the lowest "normal" value for any combination is 3uA, that's why in the datasheet you showed says "...or 3ua whichever is greater..." Also there are time and temperature considerations (5min or 2min) under which the readings are different. It seems that the formula you used is 0.01*C*V The correct one would be (0.01*c*v)+3 for the NORMAL reading IF the voltage is below 100V AND applied for 2min, OR the voltage is above 100V AND apllied for 5min. EN1030300 is the standard that describes the Absolute MAX values, it's formula is ((C*V)^0,7)*0,3)+4 . Hope that helps a bit, download the ecxel sheet an d give it a test. All my measurements so far for good caps fall in the first 2 cases in the sheet and ara much like yours. Thanks for reading this long post! :)
+mamoynas Hi, thanks for watching and contribution. Well to be mathematical correct it's maths is: Current (uA)= 0.01*C*V or max. 3uA if the calculated current
Hello none of your links below the video work.
+Richard Bruno Hi Richard, thanks for the info. Links should work now. All the best and CHeers
I wish I learned this when I was a teen
you can still learn what you love..
Some of them only leak when they are hot ( even still within working temperature ). I hate capacitors lol
I love this formula for leakage current in Panasonic capacitors datasheets - left side of inequality is in units of current, right side in units of charge. I know that in electronics it's customary to be sloppy with units, but this " I
LOL, yeah you are right.. Thanks for watching Cheers
This formula is a standard which indicates "Leakage Current will be better than or equal to 1% of (C)apacitor Value multiplied by the capacitors Working (V)oltage or a maximum of 3µA". I hope this is helpful.
Ken Foland Considering that if you multiply capacitance by voltage you'll get answer in units of electrical charge it still doesn't make sense. And I don't know how writing algebraic formula in words instead of symbols change anything;)
Which implies that the units of the constant 0.01 are 1/seconds. That makes sense if you think about it.
For detail specifications the machine & PRICE Machine Capacitor Leakage Current- Ir meter
Please Contact
VALTEKINDO
Thank you
Hey TRXBench. I know almost nothing of electronics. That said, I have a question. I have an ignition box called an M.S.D. ignition box. It is a capacitive discharge ignition box for a car's ignition. When it's running right, it should not have voltage to ignition coil. This box has an led to know it's working right. if the light is bright,there will be no voltage at the coil,and car will start but when the light is dim,there is 425 volts at the coil and will not start this way.If i turn the ign. switch on and off for quite a few times, i might get the light to be bright sometimes. Here is a schematic on page 13 web.tiscalinet.it/giordy/ECU/msd6a_02.pdf . The circuitry is potted. is there an easier way to "discharge"?? the cap,if it is that, so that I get it to work? THANK YOU!!!!!!!
Hi! Check your ignition switch resistances and clean the contacts with alcohol, then check all your circuit parallel resistor connections and resistances, sounds like some resistor has bad connection and switches sometimes off. So output voltage is "sometimes low", what about input voltage? If input voltage is fine, then do diode test on all diodes and transistors. If that did not fix it, then desolder one leg of the output capacitor and measure the capacitance of the component.
I did not find LED symbol on the circuit by the way! Did you get it working?
I've checked all connections , moved wires around and nothing. sorry, I forgot to mention that the one box that I have is for a motorcycle and the schematic that you saw does not have the led light. Shouldn't the cap in the box be storing current and not letting it bleed out to the coils? If so, is there a method to " dissipate" the current, so that it goes back to the way it's supposed to function? There should not be any current to the coils when the engine is NOT running. I have tried grounding quickly the pos. side of the coil ,it sparks when it makes ground, but it still has current afterwards. Also, I cannot check any circuitry because it is all potted.. Thank you once again!
Ah, that is horrible case. You can either break the "black box" in risk not to rebox it, or just replace the whole thing. But the ignition on the OFF-state can mean that the ignition switch is broken, it sends IGNITE-signal to the circuit. Ignition itself must be started by the alternator or the signal from sensor, so coil should not make any sparks without right phase and rotating movement started by the starter motor. It really sounds starnge that you have ignition at the OFF-stage of the ignition switch. Good luck with resolving it, but you probably should call an expert to resolve it.
Sorry, i was not clear again. When the ign key is off,there is no current to coils. When the ign. is on, but engine not running, coils have current. When key on, engine not running is when the led is r either dim or bright.
My father repaired radios and amplifiers for 50 years he never had this kind of meters he tested al capacitors on a analoge multimeter or in circuit
Never had any problems after repairs so it’s obvious you don’t need al that fancy equipment
Make that "its" in the title, not "it's".
Thanks for the hint...done 73
I opt for a capacitor tester with real operating voltage. I designed this one (see link), a bit over complicated, but it works very nice.
It has a very sensitive current meter. It can do the same as the factory unit in this video.
people.zeelandnet.nl/wgeeraert/radio.htm#lektest
I also programmed a leakage table in Basic like in the video, export to a CSV file.
After some Excel edit: the resulting PDF is over here:
pe1abr.homeserver.com/home/pdf/electrolyte_leakage_current_guide__PE1ABR.pdf
Hi Walter thanks for your contribution very much appreciated! 73
Thanks Walter - had a look at the links - some interesting info & great you’ve carried out the leg work providing charts on pdf - thank you very much!
(y)
I hope that the leakage measuring instrument is discharging the capacitor as the test button is released. Otherwise, it was fun watching the presenter flirting with disaster.
Hello Paul - wow that was some nifty repair.
On another matter if I may. I would like to build/purchase from you a kit (if available) for the LV Capacitor Leakage Tester. I would appreciate if you could let me know if its still available.
73 de Ger You can see my contact details on QRZ
Peter...where can I find one of those isotester 6's? you are using?
+Doctor Forbin Oh that was a diy project years ago. So you can't find it.