mstechca
New Member
I bought a 25-pack of 2N3904 NPN's and after using alot of them, I realized that all of them were DEAD, coming out of the package. There were two left. I thought I will use them as my varactors. What happened, they DID NOT WORK LIKE 2N3904's. These 2N3904's had black faces
I bought an 8-pack before it and the face of the transistor was coloured white. They worked beautifully in every case, including the varactors. Unfortunately I ran out, and I need more.
Before I buy transistors, can someone tell me the difference between a working transistor and a faulty transistor just by looking at it? because once I buy it, it is not refundable, and they don't allow testing in the store.
I bought an 8-pack before it and the face of the transistor was coloured white. They worked beautifully in every case, including the varactors. Unfortunately I ran out, and I need more.
Before I buy transistors, can someone tell me the difference between a working transistor and a faulty transistor just by looking at it? because once I buy it, it is not refundable, and they don't allow testing in the store.