Products > Test Equipment
EEVBlog 121GW Discussion thread
GraXXoR:
Just want to say it once again; your response to individual requests in a forum of this size is outstanding. And not only that but during the Christmas holidays to boot!
Thank you so much for the post hoc discount. It’s very much appreciated and unexpected little Christmas bonus!
I look forward to putting the 121 through it paces in the new year!
Apologies if I came off as acerbic in my previous post…
Best regards and have a Merry Christmas if you’re celebrating tomorrow!
Grx.
Dr. Frank:
I bought the 121GW on Kickstarter in 2018.
It came with that nice pouch, and those great test tips from B.T.C.
One of the useful feature of this combo is, that it is possible to make quite stable mΩ measurements in its 50 Ohm range.
After 6 years of intense use, the red tip now showed unreliable Ohm measurements, as the shorted tips are reading unstable ~100..1000 mΩ, instead of < 100mΩ, as before.
This prevented a quick analysis of the power supply fault of my FLUKE 5442A calibrator, see here:
https://www.eevblog.com/forum/metrology/lowest-drift-lowest-noise-voltage-reference/msg5258283/#msg5258283
I already wanted to discard the tips, but had a closer look, as the tip needle could somehow be rotated inside the rubber grips.
To my big joy, the grips can be pulled downwards, if you carefully grab the tips with a pliers at the thread.
The tip needles were tightly clamped to some cable clips, and the cable's wire, maybe silver plated copper, is clamped at the other side.
Latter seemed to be the problem, that due to oxidation this connection made bad contact.
So I used a 20W soldering iron with a bigger tip, and soldered the end of the wire to the clip.
Afterwards, the test tips are again showing stable 100mΩ when shorted.
Great quality, and I just love such repairable test tips. Very rare!
Frank
EEVblog:
--- Quote from: Dr. Frank on January 21, 2024, 10:36:05 am ---I already wanted to discard the tips, but had a closer look, as the tip needle could somehow be rotated inside the rubber grips.
To my big joy, the grips can be pulled downwards, if you carefully grab the tips with a pliers at the thread.
--- End quote ---
I've never tried that!
AVGresponding:
This also raises the question, are new tips available from Brymen? I have two sets of those leads, one is perfect (I owned that from new...) but the other is heavily scarred (came with an abused bench meter I bought) and could use fresh tips.
EEVblog:
--- Quote from: AVGresponding on January 21, 2024, 11:05:10 am ---This also raises the question, are new tips available from Brymen? I have two sets of those leads, one is perfect (I owned that from new...) but the other is heavily scarred (came with an abused bench meter I bought) and could use fresh tips.
--- End quote ---
Not that I know of.
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