Unit7
Well-known member
Here's yet another noob question… (Please see question in bold below if you want to skip all the babble)
I just ordered everything for David's NV73 preamp build (for 51X/24V). Re the discontinued BC184c transistors I decided to go for a pack of 100pc from an eBay seller.
I've read all I could find about the build and noticed that the 184c are good for this design because of the higher HFE. I don't know what HFE is, and I'm not sure I'd understand even if someone tried to explain, but as I understand higher HFE values helps keeping noise down.
I also read that I should pick transistors with a HFE value of 600 or higher for certain positions. I'll ask David eventually about where those are in his design.
The bottom line is that I will have to measure my BC184c transistors before completing the build.
I googled a little and found the basics about transistors - collector, emitter and base. I still don't understand much what they really do in a design but perhaps enough to be able to measure.
One article I found describe a way to measure a transistor with a multimeter set to measure resistance, to see if the transistor is healthy or not. This brings to my question: Is a multimeter enough to measure the HFE, or do I need another tool?
I've seen special measuring tools for transistors but would prefer to find a cheaper way to do it because this is something I won't do very often.
Grateful for any advice
Paul
I just ordered everything for David's NV73 preamp build (for 51X/24V). Re the discontinued BC184c transistors I decided to go for a pack of 100pc from an eBay seller.
I've read all I could find about the build and noticed that the 184c are good for this design because of the higher HFE. I don't know what HFE is, and I'm not sure I'd understand even if someone tried to explain, but as I understand higher HFE values helps keeping noise down.
I also read that I should pick transistors with a HFE value of 600 or higher for certain positions. I'll ask David eventually about where those are in his design.
The bottom line is that I will have to measure my BC184c transistors before completing the build.
I googled a little and found the basics about transistors - collector, emitter and base. I still don't understand much what they really do in a design but perhaps enough to be able to measure.
One article I found describe a way to measure a transistor with a multimeter set to measure resistance, to see if the transistor is healthy or not. This brings to my question: Is a multimeter enough to measure the HFE, or do I need another tool?
I've seen special measuring tools for transistors but would prefer to find a cheaper way to do it because this is something I won't do very often.
Grateful for any advice
Paul