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Author Topic: Franky's Kelvin Clip kit.  (Read 23039 times)

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Online Alex Nikitin

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Re: Franky's Kelvin Clip kit.
« Reply #25 on: December 05, 2015, 05:49:35 pm »
Thank you, I've found the clips from the kit on eBay and ordered a pair. Not cheap but still a good value for what it is.

Cheers

Alex
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Offline PedroDaGr8Topic starter

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Re: Franky's Kelvin Clip kit.
« Reply #26 on: December 05, 2015, 06:45:14 pm »
Quote from: Alex Nikitin on December 05, 2015, 05:49:35 pm
Thank you, I've found the clips from the kit on eBay and ordered a pair. Not cheap but still a good value for what it is.

Cheers

Alex

Honestly, if you could have waited Franky's price for the whole kit was cheaper than the price of the clips on ebay.
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Online Alex Nikitin

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Re: Franky's Kelvin Clip kit.
« Reply #27 on: December 05, 2015, 06:54:18 pm »
Quote from: PedroDaGr8 on December 05, 2015, 06:45:14 pm
Quote from: Alex Nikitin on December 05, 2015, 05:49:35 pm
Thank you, I've found the clips from the kit on eBay and ordered a pair. Not cheap but still a good value for what it is.

Cheers

Alex

Honestly, if you could have waited Franky's price for the whole kit was cheaper than the price of the clips on ebay.

Probably not, as the delivery from the US would be almost what I've paid for the clips (with free delivery). Let's just hope that the UK Customs won't charge me extra.

Cheers

Alex
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Offline PedroDaGr8Topic starter

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Re: Franky's Kelvin Clip kit.
« Reply #28 on: December 05, 2015, 07:09:53 pm »
Quote from: Alex Nikitin on December 05, 2015, 06:54:18 pm
Quote from: PedroDaGr8 on December 05, 2015, 06:45:14 pm
Quote from: Alex Nikitin on December 05, 2015, 05:49:35 pm
Thank you, I've found the clips from the kit on eBay and ordered a pair. Not cheap but still a good value for what it is.

Cheers

Alex

Honestly, if you could have waited Franky's price for the whole kit was cheaper than the price of the clips on ebay.

Probably not, as the delivery from the US would be almost what I've paid for the clips (with free delivery). Let's just hope that the UK Customs won't charge me extra.

Cheers

Alex
He ships from HK not USA. But either way, what's done is done. Hope you enjoy the clips, I think they are very well built.

Sent from my LG-ls990 using Tapatalk

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Offline robrenz

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Re: Franky's Kelvin Clip kit.
« Reply #29 on: December 05, 2015, 10:50:20 pm »
Very nice review and top quality post  :clap: :-+
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Online Alex Nikitin

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Re: Franky's Kelvin Clip kit.
« Reply #30 on: December 06, 2015, 12:07:02 am »
Quote from: PedroDaGr8 on December 05, 2015, 07:09:53 pm
[He ships from HK not USA. But either way, what's done is done. Hope you enjoy the clips, I think they are very well built.

Sorry, I did not know his location  :-[ . Anyway, I hope the clips are good. I have several bits of equipment that can benefit from better Kelvin clips.

Cheers

Alex
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Offline PedroDaGr8Topic starter

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Re: Franky's Kelvin Clip kit.
« Reply #31 on: December 06, 2015, 01:26:54 am »
Quote from: robrenz on December 05, 2015, 10:50:20 pm
Very nice review and top quality post  :clap: :-+
Thanks a bunch, it means a lot coming from you. Long time no see by the way, glad to see you back here.
Quote from: Alex Nikitin on December 06, 2015, 12:07:02 am
Quote from: PedroDaGr8 on December 05, 2015, 07:09:53 pm
[He ships from HK not USA. But either way, what's done is done. Hope you enjoy the clips, I think they are very well built.

Sorry, I did not know his location  :-[ . Anyway, I hope the clips are good. I have several bits of equipment that can benefit from better Kelvin clips.

Cheers

Alex
If you got the same model you will like them.

Sent from my LG-ls990 using Tapatalk

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Offline motocoder

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Re: Franky's Kelvin Clip kit.
« Reply #32 on: December 06, 2015, 03:38:54 pm »
Very nice. Thanks for the review. I would like to build a set, but would use the really high quality banana plugs that Franky sells, and also maybe the heat shrink that has the glue built in.

Franky, please post here when you've got the, back in stock.
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Offline iloveelectronics

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Re: Franky's Kelvin Clip kit.
« Reply #33 on: December 08, 2015, 06:48:58 am »
Thanks everyone who has expressed interest either through postings or PM's. I will have an update on availability and pricing as soon as I come back from my holiday (on the 24th). Hong Kong Post is increasing postage in the new year so pricing will be adjusted accordingly (was $17 for the clips alone, and $23 for the kit, shipped without tracking).
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Offline iloveelectronics

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Re: Franky's Kelvin Clip kit.
« Reply #34 on: January 02, 2016, 03:57:32 pm »
A few of the Kelvin clip kit (or clips alone) are now available: https://www.eevblog.com/forum/buysellwanted/franky's-sales-thread/msg833966/#msg833966
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Offline Vgkid

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Re: Franky's Kelvin Clip kit.
« Reply #35 on: January 02, 2016, 04:23:52 pm »
Would it be possible for me to browse your ebay store, and make a list of what i want.
Then just pay for it here, I do want those kelvin clips.
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Offline iloveelectronics

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Re: Franky's Kelvin Clip kit.
« Reply #36 on: January 02, 2016, 04:27:49 pm »
Quote from: Vgkid on January 02, 2016, 04:23:52 pm
Would it be possible for me to browse your ebay store, and make a list of what i want.
Then just pay for it here, I do want those kelvin clips.

Yes. Just PM me a list of items and your paypal email address and I can then send you the Paypal invoice. It's already midnight here so I may not respond until Sunday.
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Offline Vgkid

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Re: Franky's Kelvin Clip kit.
« Reply #37 on: January 02, 2016, 04:30:09 pm »
Thanks, will do.
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Offline BravoV

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Re: Franky's Kelvin Clip kit.
« Reply #38 on: January 15, 2016, 03:43:16 am »
Quote from: PedroDaGr8 on December 05, 2015, 03:45:59 am
Quote from: free_electron on December 05, 2015, 03:21:52 am
the only thing that worries me a bit is the usage of dissimilar metals between the clip and the wire termination ( where the screw goes in )
that may give thermocouple effects..

Honestly, I don't know enough about this but if there are any tests I can do with an HP 34401A and these leads, then let me know.

Vincent, or somebody , please elaborate more details about this so called "Thermocouple Effects" as I'm going to build my kelvin clip for my PM6306 LCR meter.
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Offline Shock

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Re: Franky's Kelvin Clip kit.
« Reply #39 on: January 15, 2016, 10:29:21 am »
Quote from: BravoV on January 15, 2016, 03:43:16 am
Vincent, or somebody , please elaborate more details about this so called "Thermocouple Effects" as I'm going to build my kelvin clip for my PM6306 LCR meter.

Seebeck, Peltier and Thomson effects.
Let us know about what wire and cable design you were planning on using, should start a thread on it.

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Offline PedroDaGr8Topic starter

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Re: Franky's Kelvin Clip kit.
« Reply #40 on: January 15, 2016, 12:28:09 pm »
Quote from: Shock on January 15, 2016, 10:29:21 am
Quote from: BravoV on January 15, 2016, 03:43:16 am
Vincent, or somebody , please elaborate more details about this so called "Thermocouple Effects" as I'm going to build my kelvin clip for my PM6306 LCR meter.

Seebeck, Peltier and Thomson effects.
Let us know about what wire and cable design you were planning on using, should start a thread on it.
I think since this is in this thread, he's implying if using this kit would be acceptable and if not why?
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Offline Dr. Frank

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Re: Franky's Kelvin Clip kit.
« Reply #41 on: January 15, 2016, 01:25:25 pm »
Quote from: BravoV on January 15, 2016, 03:43:16 am
Quote from: PedroDaGr8 on December 05, 2015, 03:45:59 am
Quote from: free_electron on December 05, 2015, 03:21:52 am
the only thing that worries me a bit is the usage of dissimilar metals between the clip and the wire termination ( where the screw goes in )
that may give thermocouple effects..

Honestly, I don't know enough about this but if there are any tests I can do with an HP 34401A and these leads, then let me know.

Vincent, or somebody , please elaborate more details about this so called "Thermocouple Effects" as I'm going to build my kelvin clip for my PM6306 LCR meter.

Hi,
these thermocouples inside a measurement setup build thermoelectric voltages, which disturb Ohm measurements, 2W or 4W alike, when the resistance is measured with a constant DC current which produces low level voltages over the DUT.
This error can be cancelled by the offset compensation method, i.e. the DC current is switched on and off.
If you want to do high precision Ohm measurements, i.e. within a few ppm, you need this OCOMP feature, or you need to use better Kelvin clips.

AC impedance measurements are usually not affected, so these clips are ok for your PM6306, when you use low frequencies.
At high frequencies, the cables will create big errors by parasitic capacitance and polarisation of the silicone.

Some nice references (simply search for: Ohm Measurement Offset):

Keithley Offset Compensation
OCOMP adaptor

Frank
« Last Edit: January 15, 2016, 01:30:22 pm by Dr. Frank »
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Offline alank2

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Re: Franky's Kelvin Clip kit.
« Reply #42 on: January 15, 2016, 10:32:19 pm »
On the straight plugs - how do you get the plug cover over the center?  Does it twist in?  Pop in with pressure?
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Offline alank2

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Re: Franky's Kelvin Clip kit.
« Reply #43 on: January 15, 2016, 11:05:26 pm »
Never mind, I got it.  Just takes pressure.
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Offline seasalt

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Re: Franky's Kelvin Clip kit.
« Reply #44 on: September 23, 2017, 07:01:27 am »
Sorry for reviving old topic, just asking is this kit still available for purchase? I have plan to use it with DE-5000.
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Offline Shock

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Re: Franky's Kelvin Clip kit.
« Reply #45 on: April 04, 2019, 03:14:15 am »
Quote from: Free_WiFi on April 04, 2019, 01:50:00 am
Please people,forgive me for my laziness,but i have this question regarding these kelvin clips.
According to this picture you need to use the screw to install the nickel plated part for the wire...
is this a really good way to make an absolutely solid rock contact with the golden plated part ?
I'm asking,because for me these clips didn't looks like an ultimate deal .

Rock solid physically or the best electrical connection? The two parts are secured together quite well with the screw. The problems associated with connecting dissimilar metals was discussed a few posts back.

The Gwinstek style is not the ultimate kelvin clip but at $13 for two clips (if you shop around) plus the cost of wire and two banana plugs is quite reasonable.
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Offline Free_WiFi

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Re: Franky's Kelvin Clip kit.
« Reply #46 on: April 04, 2019, 04:27:55 am »
« Last Edit: April 04, 2019, 04:32:35 am by Free_WiFi »
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Offline GreyWoolfe

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Re: Franky's Kelvin Clip kit.
« Reply #47 on: April 10, 2019, 06:13:58 pm »
I bought these along with banana plugs from Frankie's store.
https://www.ebay.com/itm/2Pcs-Brass-Copper-Gwinstek-LCR-Kelvin-Test-Clip-Microresistivity-Bridge-Champ/322011815415?epid=1084392470&hash=item4af9665df7:g:mfMAAOSwezVWzW7Y

They seem to work quite well.  That is a 1R1 5% resistor on my GW-Instek 8251A.

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Offline Free_WiFi

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Re: Franky's Kelvin Clip kit.
« Reply #48 on: April 10, 2019, 08:18:21 pm »
Quote from: GreyWoolfe on April 10, 2019, 06:13:58 pm
I bought these along with banana plugs from Frankie's store.


They seem to work quite well.  That is a 1R1 5% resistor on my GW-Instek 8251A.

These clips are not bad,but also not very,very good .... at this point i still prefer these one with thermal isolation,ptfe roller separator and the possibility to solder the wire directly to the alloy




https://it.aliexpress.com/item/4-Wires-Kelvin-Leads-Test-Clamp-Alligator-Clip-Set-Include-Cable-Safety-Plugs/32577493461.html
« Last Edit: April 10, 2019, 08:28:13 pm by Free_WiFi »
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Offline BravoV

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Re: Franky's Kelvin Clip kit.
« Reply #49 on: April 11, 2019, 07:27:45 am »
Quote from: Free_WiFi on April 10, 2019, 08:18:21 pm
These clips are not bad,but also not very,very good .... at this point i still prefer these one with thermal isolation,ptfe roller separator and the possibility to solder the wire directly to the alloy

Franky's shop also sell those, I own both types and each has it's own purposes depends on the DUTs.

This is bought from Franky while ago.

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