In the past few years, I have been trying to find various laminated materials suitable for microphone transformers. Finally, I came to a conclusion that high-performance magnetic materials are relatively easy to obtain and slicing is not difficult, but after slicing, a precise secondary annealing process is required, and the temperature is very difficult to control. At present, it is difficult to find a factory that can meet our requirements in the world. In order to achieve excellent low-frequency performance, their annealing process requirements are very high. At present, I only know that VAC in Germany has this experience, and it is very expensive to buy in small batches. I have tested alloy sheets from many manufacturers. For example, the original laminations I disassembled from Neumann BV12 are compared with the laminations from other companies that I found myself. There is a big difference in low-frequency response and distortion rate, which has nothing to do with winding.
I also compared the finished products of well-known brands, analyzed and tested them carefully, and without exception, their low-frequency performance, in particular, far exceeded the performance of DIY and several cheap brands. Finally, I knew I had to give up, because it was impossible to achieve excellent performance at the lowest cost. So when the quantity is small, the most economical way is to buy products that are praised by many people, because their quality is recognized by most people.
I also compared the finished products of well-known brands, analyzed and tested them carefully, and without exception, their low-frequency performance, in particular, far exceeded the performance of DIY and several cheap brands. Finally, I knew I had to give up, because it was impossible to achieve excellent performance at the lowest cost. So when the quantity is small, the most economical way is to buy products that are praised by many people, because their quality is recognized by most people.
Attachments
Last edited:
