testing smd capacitors with the chinese clip

[Jan Panteltje]

testing_smd_capacitors_with_the_chinese_clip_IMG_6997.JPG

The 47 pF SMD reads 45.230 pF, after zeroing the meter with the clip attached,
hand free measurements.

The clip
https://www.ebay.com/itm/254207643325

fits nicely with
http://panteltje.com/panteltje/pic/lc_pic/

10 pF also close...

It is the small ones I care about.

The spring in the Chinese alligator clip is very strong,
I bended it a bit back to reduce the force on the SMDs.
It is not so easy to get the spring out,
easy to shift it back in...

 

[John Larkin]

On Wed, 12 Jun 2019 19:42:10 GMT, Jan Panteltje
<pNaOnStPeAlMtje@yahoo.com> wrote:

testing_smd_capacitors_with_the_chinese_clip_IMG_6997.JPG

The 47 pF SMD reads 45.230 pF, after zeroing the meter with the clip attached,
hand free measurements.

The clip
https://www.ebay.com/itm/254207643325

fits nicely with
http://panteltje.com/panteltje/pic/lc_pic/

10 pF also close...

It is the small ones I care about.

The spring in the Chinese alligator clip is very strong,
I bended it a bit back to reduce the force on the SMDs.
It is not so easy to get the spring out,
easy to shift it back in...

My people use this for receiving inspection, a few parts off each
reel.

https://www.dropbox.com/s/jucgwk3tz8jlhly/DSC03651.JPG?raw=1

https://www.dropbox.com/s/s1p7k86ygvqi9lc/DSC03652.JPG?raw=1

https://www.dropbox.com/s/7l8hhtu64a3wrqs/DSC03653.JPG?raw=1


I found the little fixture on ebay.



--

John Larkin Highland Technology, Inc
picosecond timing precision measurement

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com

 

[Winfield Hill]

John Larkin wrote...

My people use this for receiving inspection, a few parts off each
reel.

https://www.dropbox.com/s/jucgwk3tz8jlhly/DSC03651.JPG?raw=1

https://www.dropbox.com/s/s1p7k86ygvqi9lc/DSC03652.JPG?raw=1

https://www.dropbox.com/s/7l8hhtu64a3wrqs/DSC03653.JPG?raw=1

I found the little fixture on ebay.

That's a copy of the HP 16034E, for the 4192A, etc.


--
Thanks,
- Win

 

[Jan Panteltje]

On a sunny day (Wed, 12 Jun 2019 15:42:25 -0700) it happened John Larkin
<jjlarkin@highland_snip_technology.com> wrote in
<3pv2ge17p70mevl2h89k909vrv0phe9h19@4ax.com>:

On Wed, 12 Jun 2019 19:42:10 GMT, Jan Panteltje
pNaOnStPeAlMtje@yahoo.com> wrote:


testing_smd_capacitors_with_the_chinese_clip_IMG_6997.JPG

The 47 pF SMD reads 45.230 pF, after zeroing the meter with the clip attached,
hand free measurements.

The clip
https://www.ebay.com/itm/254207643325

fits nicely with
http://panteltje.com/panteltje/pic/lc_pic/

10 pF also close...

It is the small ones I care about.

The spring in the Chinese alligator clip is very strong,
I bended it a bit back to reduce the force on the SMDs.
It is not so easy to get the spring out,
easy to shift it back in...




My people use this for receiving inspection, a few parts off each
reel.

https://www.dropbox.com/s/jucgwk3tz8jlhly/DSC03651.JPG?raw=1

That is nicely made!

One thing I wonder, had the same idea here, that foam you use, what is the dielectric constant?
It gets a bit between the test pins, if you zero with it,
and then add the SMD does it cause an error?
I forgot to mention that I adjusted the spring in my case so the alligator clip never 100% closes,
but just stays a mm or 2 open, and am using a flat table:
http://panteltje.com/pub/modified_chinese_clip_stays_open_IMG_7008.JPG

That makes zeroing easier, else you'd have to put a something like a match in between the contacts.

>https://www.dropbox.com/s/s1p7k86ygvqi9lc/DSC03652.JPG?raw=1

It is nice, but there is price difference with my gadget
356$ plus 90$ shipping on ebay:
https://www.ebay.com/itm/202004797791

For production it is cool of course.
I just wanted to check if the SMD caps were in the right boxes from my ebay set,
after I had some strange effects replacing caps for tuning RF stuff.



>https://www.dropbox.com/s/7l8hhtu64a3wrqs/DSC03653.JPG?raw=1

That is either a VERY small one or a short?

I found the little fixture on ebay.

Yes:
https://www.ebay.com/itm//220326883040
~204 $



That is a lot of icecream.

 

[John Larkin]

On Thu, 13 Jun 2019 06:07:12 GMT, Jan Panteltje
<pNaOnStPeAlMtje@yahoo.com> wrote:

On a sunny day (Wed, 12 Jun 2019 15:42:25 -0700) it happened John Larkin
jjlarkin@highland_snip_technology.com> wrote in
3pv2ge17p70mevl2h89k909vrv0phe9h19@4ax.com>:

On Wed, 12 Jun 2019 19:42:10 GMT, Jan Panteltje
pNaOnStPeAlMtje@yahoo.com> wrote:


testing_smd_capacitors_with_the_chinese_clip_IMG_6997.JPG

The 47 pF SMD reads 45.230 pF, after zeroing the meter with the clip attached,
hand free measurements.

The clip
https://www.ebay.com/itm/254207643325

fits nicely with
http://panteltje.com/panteltje/pic/lc_pic/

10 pF also close...

It is the small ones I care about.

The spring in the Chinese alligator clip is very strong,
I bended it a bit back to reduce the force on the SMDs.
It is not so easy to get the spring out,
easy to shift it back in...




My people use this for receiving inspection, a few parts off each
reel.

https://www.dropbox.com/s/jucgwk3tz8jlhly/DSC03651.JPG?raw=1

That is nicely made!

It is. It's $150 on ebay.

One thing I wonder, had the same idea here, that foam you use, what is the dielectric constant?
It gets a bit between the test pins, if you zero with it,
and then add the SMD does it cause an error?

I open the gap by eyeball, about the size of the part, zero the meter,
then insert the part.

I forgot to mention that I adjusted the spring in my case so the alligator clip never 100% closes,
but just stays a mm or 2 open, and am using a flat table:
http://panteltje.com/pub/modified_chinese_clip_stays_open_IMG_7008.JPG

That makes zeroing easier, else you'd have to put a something like a match in between the contacts.

https://www.dropbox.com/s/s1p7k86ygvqi9lc/DSC03652.JPG?raw=1

It is nice, but there is price difference with my gadget
356$ plus 90$ shipping on ebay:
https://www.ebay.com/itm/202004797791

I think this is the one I bought:

https://www.ebay.com/itm/NEW-LCR-RCL-METER-TEST-FIXTURE-FOR-SMD-COMPONENT/352630796382?hash=item521a6ef05e:g:SvYAAOSwA3dYTLJR

For production it is cool of course.
I just wanted to check if the SMD caps were in the right boxes from my ebay set,
after I had some strange effects replacing caps for tuning RF stuff.



https://www.dropbox.com/s/7l8hhtu64a3wrqs/DSC03653.JPG?raw=1

That is either a VERY small one or a short?

That's the default position, shorted. It's spring loaded in the
shorting direction.

I found the little fixture on ebay.

Yes:
https://www.ebay.com/itm//220326883040
~204 $



That is a lot of icecream.

If we catch one reel of bad parts, it's paid for itself. Reworking 50
boards would be expensive.




--

John Larkin Highland Technology, Inc

lunatic fringe electronics

 

[Jan Panteltje]

On a sunny day (Thu, 13 Jun 2019 07:56:49 -0700) it happened John Larkin
<jjlarkin@highlandtechnology.com> wrote in
<jno4gelt4po36bprrlrq6g0e2m911c27hc@4ax.com>:

I think this is the one I bought:

https://www.ebay.com/itm/NEW-LCR-RCL-METER-TEST-FIXTURE-FOR-SMD-COMPONENT/352630796382?hash=item521a6ef05e:g:SvYAAOSwA3dYTLJR



For production it is cool of course.
I just wanted to check if the SMD caps were in the right boxes from my ebay set,
after I had some strange effects replacing caps for tuning RF stuff.



https://www.dropbox.com/s/7l8hhtu64a3wrqs/DSC03653.JPG?raw=1

That is either a VERY small one or a short?

That's the default position, shorted. It's spring loaded in the
shorting direction.

OK, got it, thought for a moment even smaller SMDs ..

I found the little fixture on ebay.

Yes:
https://www.ebay.com/itm//220326883040
~204 $



That is a lot of icecream.


If we catch one reel of bad parts, it's paid for itself. Reworking 50
boards would be expensive.

True