Vacuum Tubes is an Audio Products. Most of them are fabricated using standard bipolar processes. In order to obtain high-performance circuits, some modifications or additional manufacturing processes are performed on the basis of standard processes in order to fabricate various different performance on the same chip. Sourcing hard-to-find electronic components in the open market is a time-consuming work. HK YST ELECTRONIC LIMITED specializes in offering obsolete & end-of-life Vacuum Tubes products, with in-stock inventory, datasheets and online purchasing. Find needed electronic parts, please review our online inventory below.