1. High production cost: 396a tubes are a high-power, high-frequency, high-voltage tubes, and their production process requires the use of special materials and processes, which are more costly.
2. Low production: Due to the production difficulty of 396a tube, its production is low, and the demand exceeds the supply, which in turn leads to price increase.
3. Rarity: with the development of the times, many electronic devices no longer use 396a tubes, so the tube has gradually withdrawn from the market, and now the supply on the market is getting less and less, is also one of the reasons that lead to high prices.
The 396a tube is a high-performance tube with excellent amplification, modulation and frequency conversion. At the same time, due to its high-voltage and high-frequency operating characteristics, it can withstand large power and voltage, so it has an irreplaceable position in some special fields. For example, in the military, aerospace, medical and other fields, is still widely used 396a electron tube.
In addition to 396a tubes, there are many other types of tubes that are also expensive. These tubes have high performance and use value, such as KT88, KT120, 300B and so on. In addition, there are some antique electronic tubes with collection value, such as Siemens C3m, Telefunken ECC801S, etc., whose prices are even higher, and have become the object of electronic tube collectors.