Antique Electronics and Vintage Solid State

Tektronix 454A loose BNC

The mounting nut on the Channel 1 BNC connector of my Tektronix 454A was loose.

It’s painful to get access as the channel 1 and 2 input circuitry is shielded. The screws are not Phillips; they are instead Pozidriv. …

I’ve acquired a Krohn-Hite UHR-220 high voltage power supply. Thanks Ross!

I really like the styling on these old Krohn-Hites.

The Jones socket offers the same voltages as the binding posts on the front panel. …

I was checking out my Tek 2213 scope before selling it, and noticed that the focus was fuzzy.

A little Duck-duck-go-ing informed me that this is a fairly common problem in this series of Tek scopes.

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I scanned the instruction manual for the Ballantine 300-E and added it to my Liberated Manuals archive. Click the image below to download the PDF.