HP 9100B Repaired

I received this 9100B in Sep. 2021. It came in very good cosmetic condition, but didn’t do anything when plugged in: Not even the indicator lights. With the help of the internet, I’ve successfully identified a few problems in the power supply. I have also found some core-memory circuit malfunctioning that haven’t been encountered before. As a return, I’m now writing this post to share my diagnosis process and some over-saturated photos.

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HP5430A 18GHz微波计数器维修+测试 / Microwave Counter Repair+Testing

这其实是2019年11月完成的事情,当时拍了一些照片记录,不过因为拍摄环境限制拍得不是很好,就没发出来。最近本科快毕业了,在考虑离开学校的事情,整理了一下自己在学校外租的,专门用来当实验室(事实上更像是仓库)的出租屋。这台仪器作为所有收集到的仪器中个人最喜欢的一台,作为一个纪念,还是发出来了。

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