I've seen all these chinese LCR jobs, but they don't go <6pF. I need less than 6pF. Preferably cheaper as im out a job (again....).
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Things I've fixed: anything from semis to crappy Chinese $2 radios, and now an IoT Dildo....
"Dude, this is Wyoming, i hopped on and sent 'er. No fucking around." -- Me
Excuse me while i do something dangerous
You must have a sad, sad boring life if you hate on people harmlessly enjoying life with an animal costume.
Sometimes you need to break shit to fix it.... Thats why my lawnmower doesn't have a deadman switch or engine brake anymore
Follow the white rabbit. -
Re: Need capacitor meter
What exactly are you measuring?
picofarads add up very fast from moving wires around so there's a lot of error there to begin with... -
Re: Need capacitor meter
^ RF caps.Things I've fixed: anything from semis to crappy Chinese $2 radios, and now an IoT Dildo....
"Dude, this is Wyoming, i hopped on and sent 'er. No fucking around." -- Me
Excuse me while i do something dangerous
You must have a sad, sad boring life if you hate on people harmlessly enjoying life with an animal costume.
Sometimes you need to break shit to fix it.... Thats why my lawnmower doesn't have a deadman switch or engine brake anymore
Follow the white rabbit.Comment
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Re: Need capacitor meter
Well, yeah, RF, but are you actually measuring capacitors or are you measuring cable capacitance or something to that extent? -- because around the 3pf range, the capacitance is so low that people tend to take two pieces of wire and twist them together. This means inaccuracy is rampant and you'll need to somehow design without exact capacitances unless you're building the caps on silicon, and you're not using a capacitor meter on silicon...Comment
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Re: Need capacitor meter
^ I've got a whole mess of ATC RF microwave capacitors that are unlabeled and i need to identify the ratings so i can finish building my 100W 70cm amp...Things I've fixed: anything from semis to crappy Chinese $2 radios, and now an IoT Dildo....
"Dude, this is Wyoming, i hopped on and sent 'er. No fucking around." -- Me
Excuse me while i do something dangerous
You must have a sad, sad boring life if you hate on people harmlessly enjoying life with an animal costume.
Sometimes you need to break shit to fix it.... Thats why my lawnmower doesn't have a deadman switch or engine brake anymore
Follow the white rabbit.Comment
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Re: Need capacitor meter
BTW if you just need a quick check of a small pile of caps you can use my Sencore LC53 since we're (relatively) close by. However my "probe" is pretty shitty as proven when I tried to measure the cap of my varactor diodes, reading goes everywhere when I touch it.
You could also look for a LC53 as well, they may be available cheap since it's so old. It's designed to measure down to 1pF and has a resolution of 0.1pF, though once again, the numbers are crappy especially when trying to hook up pF capacitors especially SMT - I suppose I really should have some sort of jig to test them as touching them will throw it off.Comment
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Re: Need capacitor meter
i think the atmel based component testers go down to a fraction of a picofarad.
never tried it though.Comment
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Re: Need capacitor meter
The ridiculous thing about my LC53 is that if I zero the leads, it will happily report negative capacitance... easily giving -0.2pF or even -10pF hahahaha...
Anyway it was more for measuring leakage (capacitors) and Q (inductors). Not just value. Too bad it doesn't test "Q" for capacitors (i.e. ESR or tan δ)Comment
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I read EBOOK of Testing Electronic Component and found that
"In order to test the small blue resin coated ceramic disk capacitor which has 104 50v specification,it is possible to test this small ceramic capacitor by making use of analogue meter.
Set to times 10Kohm that has 12v output from the probe to check disorder of ceramic capacitor.
It is not uncommon that testing result of digital capacitance meter is okay,But It show shorted reading when you check it with analogue meter."
Is it really possible to test small ceramic disc capacitor with analogue... -
Hi people, I hope this is the correct spot to post this, I'm new to the forum.
I have an RTX 3080 Founders Edition which has a burnt up capacitor (it was in parallel with another capacitor which appears damaged too), so I am hoping to be able to identify the capacitor values and order replacements.
I hope these photos make it clear which component I am referring to:
(yes, the soldering is a bit botched from removing the blown one, I know)
I have found the board schematic (attached), but there does not seem to be a boardview available. I have never... -
I wanting to know if anyone has used this capacitor tester and what they think about it and weather or not it is worth the money or not...02-27-2024, 06:57 AM
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I replaced some capacitor which is located on optical pickup pcb which is shown in the table below(PCB #2).Because it have been out of order.
Now,It works very well,But I just have found that all caps (6svpc100my and other part number as well) ,which is shown in the table below, has ultra-high ripple current spec.
It is not able to obtain any capacitor which can be a substitute for this ultra-high ripple current nichicon capacitor.
So I replaced it with samxon and rubycon's general capacitor(GP,YXA series).
I know that these capacitor will not last as long as nichicon capacitor... -
Hi everyone,
I'm new to this, so I apologize for not providing enough details. Is there anything else I need to mention? I'm trying to learn more about electronic/board repairs and hopefully fix my own.
The only visible issue on my board is one capacitor, CP813, which appears to be labeled R 221k 2kV (possibly obsolete to B 221k 2kV now). My monitor hadn't shown any prior issues, although it is a few years old. Just before the capacitor popped, there was a high-pitched squeal for 2–3 seconds.
I don't see any other visible damage anywhere else on the board....
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