Category Archives: Geen categorie

Tantalum caps, are they as bad as we think ?

Posted on 9 oktober 2023 by pa4tim

No they are not. They are among the best caps when you take in account the low volume/size. You often hear they are stable, low D and last a long time. But they are not resistant to over voltage. That … Continue reading →

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TRIAC, SRC testing

Posted on 9 mei 2023 by pa4tim

TRIACs are strange beasts. The operate in 4 quadrants, that is most of them can. As far as I know they all can operate in 3 quadrants and some in all 4. The modes are a combination of the gate … Continue reading →

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12v – 19v LAPTOP CHARGER

Posted on 21 december 2022 by pa4tim

On board of my boat I have a 12V system. To charge the laptop while on the water you can use a 12 to 230V sinewave inverter but it would be efficiënter to go from 12V direct to 19 via … Continue reading →

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AVO-8 mk. 5 analog multimeter

Posted on 1 april 2014 by pa4tim

This AVO8 is from 1972 and a mark V type. It still has all the features of the older models including a high voltage range. Besides tghat there is a button to reverse polarity. The cabinet is made out of … Continue reading →

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