The High Voltage Leakage Test Is Invaluable ! No kind of low voltage solid state device can do what this device does... and that is the REAL reason to keep and use the IT-11 or similar cap tester. If you think some goofy "ESR" tester can really give you unequivocal leakage testing for electrolytics or any other high voltage cap.. I have a bridge you will want to buy near San Francisco.
Better check out the solid-state capacitor leakage tester from Mr. Carlson's Lab. Puts the IT-11, and similar units, to shame. th-cam.com/video/LhovRIM5xAo/w-d-xo.html
Thanks Jeff. I recently acquired an IT-28 cap checker. I pulled it all apart and will rebuild it. I also have the "giant meter" IM-28 VTVM - which I built when I was a kid. Fun stuff!
You confirmed 2 things for me - test voltages the unit uses for leakage test should be treated with caution and that indeed the eye will be closed when cap is leaky. :)
Yes, the unit can measure power factor for electrolytic capacitors. It is similar to measurement of ESR. I tend to use a separate dedicated ESR tester for this. The magic eye tube is green, but does look a little blue in the video for some reason.
Hi I watched this! I have that unit too! I'm not used it yet! I going to just reform capacitors by it! I didn't known I could check induction by it too! I have no manual for it and I'm wondering to get a copy from somewhere! Thanks for that great video! All the best! Assa!
New multimeters and cap meters can't test for leakage as they don't apply much voltage to the cap.. Those caps will test fine with multimeters, but not work in a set that high voltage is applied to it.. So these old cap testers do have a purpose for people who restore old electronics..
A modern DMM should work fine for testing the value most old capacitors. Some DMMS can't measure very large values of capacitance, so that can be an issue (I have one that only goes up to 100 uF, for example). They also can't test for leakage, which the old cap testers can do.
like your video but surely the it-11 is still pretty useful also for the high voltage leakage test, as only under rated load will you know if your capacitor is working.
Great Video, thank you so much for your presentation. You talked about modern devices for measuring capacitance and LCR, but do you know any good modern device to measure Capacitor Leakage? Thank you
Megger makes insulation testers that should be suitable. But modern capacitors are not very likely to leak, so there isn't much demand for such a tester.
See xraytonyb 's TH-cam channel. He reviews an EICO 950B and uses a Sencore LC53. That one might interest you. It is expensive unit. Go to his video at th-cam.com/video/kCBryQHCrb8/w-d-xo.html to see how they work. Check the specs on any unit to see if they can properly check at least a 0.01uF 600 Volt capacitor for a leakage test. Some do a poor job but the Sencore unit should do the job there.
Great job in presenting the functionality of the meter thank you. I just bought one and the seller says it is working. The unit arrived with a valve of its socket so as I open the box I found that the unit still has the old caps in it. I am thinking about replacing all of them before turning on the unit what you think?
+Really? It is a good idea to replace the paper and electrolytic caps, but it is reasonable safe to briefly power it up first and see if it is working before you start working on it.
Thank you for this demonstration I enjoyed it a lot. I was wondering if anybody know what amount of voltage it puts across the terminals when measuring resistance? Of course nobody uses it for that anymore but I'm still curious since there is no battery in it.
The process of applying an increasing voltage at low current can reform the insulating oxide layer of an electrolytic capacitor. You can find various articles and circuits on line.
interesting, and useful since I don't have the manual. bridge measurements are perfectly accurate for repair work, and to qualify and quantify components which questionable. Compared to your plastic kit..it will stand up to use in a shop much better, if you have the room. If you really need an ESR meter. get one.
You didn't cover the % Power Factor measurements. Any thoughts on that? BTW, I have the newer IT-28 but I like the look of the IT-11 much better. Is that a blue "magic eye"? Mine is phosphorescent green...
The High Voltage Leakage Test Is Invaluable ! No kind of low voltage solid state device can do what this device does... and that is the REAL reason to keep and use the IT-11 or similar cap tester. If you think some goofy "ESR" tester can really give you unequivocal leakage testing for electrolytics or any other high voltage cap.. I have a bridge you will want to buy near San Francisco.
Better check out the solid-state capacitor leakage tester from Mr. Carlson's Lab. Puts the IT-11, and similar units, to shame. th-cam.com/video/LhovRIM5xAo/w-d-xo.html
i own an IT-28 but i like the more colorful front of the IT-11.
Thanks Jeff. I recently acquired an IT-28 cap checker. I pulled it all apart and will rebuild it. I also have the "giant meter" IM-28 VTVM - which I built when I was a kid. Fun stuff!
Great video, Jeff. My IT-11 is one of my most prized bits of test kit.
You confirmed 2 things for me - test voltages the unit uses for leakage test should be treated with caution and that indeed the eye will be closed when cap is leaky. :)
Thank you sir! Most helpful video.
Yes, the unit can measure power factor for electrolytic capacitors. It is similar to measurement of ESR. I tend to use a separate dedicated ESR tester for this. The magic eye tube is green, but does look a little blue in the video for some reason.
Hi I watched this! I have that unit too! I'm not used it yet! I going to just reform capacitors by it! I didn't known I could check induction by it too! I have no manual for it and I'm wondering to get a copy from somewhere! Thanks for that great video! All the best! Assa!
New multimeters and cap meters can't test for leakage as they don't apply much voltage to the cap.. Those caps will test fine with multimeters, but not work in a set that high voltage is applied to it.. So these old cap testers do have a purpose for people who restore old electronics..
A modern DMM should work fine for testing the value most old capacitors. Some DMMS can't measure very large values of capacitance, so that can be an issue (I have one that only goes up to 100 uF, for example). They also can't test for leakage, which the old cap testers can do.
Also DMM are not accurate when measuring capacitance at lower values (lower than 200uf for example)
like your video but surely the it-11 is still pretty useful also for the high voltage leakage test, as only under rated load will you know if your capacitor is working.
Great Video,
thank you so much for your presentation.
You talked about modern devices for measuring capacitance and LCR, but do you know any good modern device to measure Capacitor Leakage?
Thank you
Megger makes insulation testers that should be suitable. But modern capacitors are not very likely to leak, so there isn't much demand for such a tester.
See xraytonyb 's TH-cam channel. He reviews an EICO 950B and uses a Sencore LC53. That one might interest you. It is expensive unit.
Go to his video at th-cam.com/video/kCBryQHCrb8/w-d-xo.html to see how they work. Check the specs on any unit to see if they can properly check at least a
0.01uF 600 Volt capacitor for a leakage test. Some do a poor job but the Sencore unit should do the job there.
Great job in presenting the functionality of the meter thank you. I just bought one and the seller says it is working. The unit arrived with a valve of its socket so as I open the box I found that the unit still has the old caps in it. I am thinking about replacing all of them before turning on the unit what you think?
+Really? It is a good idea to replace the paper and electrolytic caps, but it is reasonable safe to briefly power it up first and see if it is working before you start working on it.
Wise advise, I will do just that. Thank you Jeff
NICE equipment!!!
Thank you for this demonstration I enjoyed it a lot.
I was wondering if anybody know what amount of voltage it puts across the terminals when measuring resistance? Of course nobody uses it for that anymore but I'm still curious since there is no battery in it.
I measure about 8 VAC 60 Hz on the RX1 and RX100 ranges and 33 VAC on RX10K with a high impedance load (oscilloscope or DMM).
@@jefftranter I see thank you so much for taking time to answer.
How does "reforming" work? Fascinating!
The process of applying an increasing voltage at low current can reform the insulating oxide layer of an electrolytic capacitor. You can find various articles and circuits on line.
Remember me if you ever decide to sell it a very nice unit sir,and a great video
interesting, and useful since I don't have the manual. bridge measurements are perfectly accurate for repair work, and to qualify and quantify components which questionable. Compared to your plastic kit..it will stand up to use in a shop much better, if you have the room. If you really need an ESR meter. get one.
yeah but none of those new meteres have a cool majic eye.grt vid peace from oklahoma city
It is likely some bad paper caps and/or resistors that have changed value.
You didn't cover the % Power Factor measurements. Any thoughts on that?
BTW, I have the newer IT-28 but I like the look of the IT-11 much better. Is that a blue "magic eye"? Mine is phosphorescent green...
Does anyone no of a group of groups for those of us looking to buy restored old tube radios ,old tezt equipment etc.
Here are a couple of groups specific to Heathkit:
groups.yahoo.com/neo/groups/heathkit/info
mailman.qth.net/mailman/listinfo/heathkit
For a copy of the manual, try the sites d8apro.com and mods.dk