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This machine has been in my eBay collection for a long time. One day, I casually glanced at my collection and suddenly found the seller had drastically reduced the price to just $15, with a best offer option. You can’t lose with $15, you can’t be fooled with $15. Without further ado, I decisively made the purchase.
According to very limited information, this machine is codenamed AN/ASX-2, which is part of the non-cooperative identification system developed by the US military for the F4 fighter jet in 1968. The so-called non-cooperative identification means identifying the target type directly by analyzing the target’s characteristic information without using a radio transponder. Naturally, such a system has a high probability of misjudgment. The machine we are dissecting uses frequency spectrum analysis of radar echoes to determine the opponent’s aircraft type and classify the target. Of course, this equipment is very old, and today it has completely lost its confidentiality value. In addition, due to a misjudgment in 1988, the US military shot down an Iranian passenger plane (see Iran Air Flight 655 disaster), after which the US terminated the research and development of the non-cooperative identification system (of course, whether private development continued is unknown). Therefore, such equipment has been completely abandoned and appears on the internet as electronic waste.
The machine I received has a serial number of 001. It is said that this equipment was only produced in six units, and it is estimated that this is the first prototype developed by the US military. It is also likely the first operational machine since development began in 1965, so I feel its historical value is significant. However, it is clear that the machine can no longer operate; several boards are missing, and circuits like the simulation front end have been removed. Overall, it is still relatively complete. I am sharing this for everyone to see.
The shell is gray, and nothing can be seen.
Some words are written on this side, indicating that the machine is broken and can only be used as parts.
Finally, I recommend an awesome public account.
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