Hello
I bought an assortment of diodes on ebay some time ago. They are described as germanium. They all look the same apart from their markings.
I have read a few articles now that say that the threshold voltage of germanium diodes is 0.3V. I have been sampling these diodes and some of them appear to have a threshold voltage of 0.6V (1N4002), which is more like a silicon diode, and some have a threshold voltage of 0.2V (1N5819), which seems a bit low. Can anyone explain these findings? Is this normal is it just a matter of them being crap?
These are the diodes I bought.
https://www.ebay.co.uk/itm/303029116321
Also, I am looking for a regular diode with a threshold value of 3V or 5V. I have had a look around and I tend to keep coming across zener diodes. That's not what I want. Can anyone suggest a source? Or a type.
Thanks
I bought an assortment of diodes on ebay some time ago. They are described as germanium. They all look the same apart from their markings.
I have read a few articles now that say that the threshold voltage of germanium diodes is 0.3V. I have been sampling these diodes and some of them appear to have a threshold voltage of 0.6V (1N4002), which is more like a silicon diode, and some have a threshold voltage of 0.2V (1N5819), which seems a bit low. Can anyone explain these findings? Is this normal is it just a matter of them being crap?
These are the diodes I bought.
https://www.ebay.co.uk/itm/303029116321
Also, I am looking for a regular diode with a threshold value of 3V or 5V. I have had a look around and I tend to keep coming across zener diodes. That's not what I want. Can anyone suggest a source? Or a type.
Thanks