Products > Test Equipment
Peaktech 4250 AC/DC current clamp teardown and repair.
The Soulman:
I've owned this clamp now for a while but never was satisfied with the low current readings there was to much noise and drift to be useful.
After reading here: https://www.eevblog.com/forum/testgear/hantek-cc-65-acdc-current-probe-teardown-and-testing/
about insufficient decoupling in the Hantek CC-65 I decided to open up my (similair but not exactly the same) Peaktech.
And discovered there weren't any electrolytic capacitors fitted at all! :-//
Fitted some 33uf 35V caps because that is what I had and it functions much better now. :-+
Anyone has an idea about who could be the OEM of these clamps and what each of those trim pots does?
The Soulman:
More pics..
The Soulman:
Caps fitted..
schmitt trigger:
I have that exact same probe!
Between today and tomorrow I will open it up and see if it also has the same capacitors missing.
To your question, I see a pair of probable answers:
-cost savings. When a company sells these so inexpensively, every cent counts!
-manufacturing error. The board is a mixed mode SMT/TH component assembly. Perhaps the TH components are hand fitted, and they forgot installing the electrolytics.
The Soulman:
--- Quote from: schmitt trigger on January 30, 2018, 05:08:40 pm ---I have that exact same probe!
Between today and tomorrow I will open it up and see if it also has the same capacitors missing.
To your question, I see a pair of probable answers:
-cost savings. When a company sells these so inexpensively, every cent counts!
-manufacturing error. The board is a mixed mode SMT/TH component assembly. Perhaps the TH components are hand fitted, and they forgot installing the electrolytics.
--- End quote ---
Cool, yeah my idea is that the guy or gall responsible for fitting them came in late that day or had a long lunch break...
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