Products > Test Equipment
Test Equipment Anonymous (TEA) group therapy thread
DC1MC:
Just in case someone in Germany wants this thing;
https://www.kleinanzeigen.de/s-anzeige/rlc-messbruecke/2919938194-168-2155
Cheers,
DC1MC
Robert763:
--- Quote from: factory on November 09, 2024, 07:47:52 pm ---A question for those with the Peak DCA75 component tester, does anyone else have trouble with it testing 1N82x series reference Zeners? Mine fails to detect some of them, but these do test OK with the curve tracing software, note both the firmware & software are up to date.
David
--- End quote ---
The DCA will show a 1N82x as open circuit / unknown due to the normal PN junction in reverse series with the zener element. This is for temperature compensation but causes the diode to have no forward conductivity.
Robert763:
--- Quote from: m k on November 10, 2024, 07:29:40 pm ---I'd say that real bargain is possible only when you find an item others have not found.
All other cases you value the item more, so it's a conditional bargain.
Best possible situation is when seller doesn't know what they are selling and use misleading name.
Then your job is just spot the revealing picture.
--- End quote ---
Yep,
Examples 2x R&S CRTU / CMU200s radio test sets and a CMW-CU controller for £82 or a HP 8920A with SA/TG for £75. Me gloat?
factory:
--- Quote from: Robert763 on November 11, 2024, 10:09:42 pm ---
--- Quote from: factory on November 09, 2024, 07:47:52 pm ---A question for those with the Peak DCA75 component tester, does anyone else have trouble with it testing 1N82x series reference Zeners? Mine fails to detect some of them, but these do test OK with the curve tracing software, note both the firmware & software are up to date.
David
--- End quote ---
The DCA will show a 1N82x as open circuit / unknown due to the normal PN junction in reverse series with the zener element. This is for temperature compensation but causes the diode to have no forward conductivity.
--- End quote ---
The strange thing, is the DCA75 does detect some of the 1N82x, the batch of blue 1N827 for example, the Au lead ones were all detected as an approx 6.2V diode junction, but the tinned lead ones were not detected. This was the question I was asking about, maybe it's the lower nominal voltage ones that get detected. edit: can't be that as the Au ones had a higher voltage.
I'm aware of the series reverse diode, one of which is shorted out of that batch, the Zener part is still intact, shown in the curve plots attached to post #136933. :-//
David
wkb:
--- Quote from: Robert763 on November 11, 2024, 10:20:27 pm ---
--- Quote from: m k on November 10, 2024, 07:29:40 pm ---I'd say that real bargain is possible only when you find an item others have not found.
All other cases you value the item more, so it's a conditional bargain.
Best possible situation is when seller doesn't know what they are selling and use misleading name.
Then your job is just spot the revealing picture.
--- End quote ---
Yep,
Examples 2x R&S CRTU / CMU200s radio test sets and a CMW-CU controller for £82 or a HP 8920A with SA/TG for £75. Me gloat?
--- End quote ---
* wkb hates 😆
Although... one HP and one Agilent E4418B RF power meter, together for €60 incl shipping was not bad. Needed fixing but heh.. both work now.
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