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.

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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. …

Krohn-Hite UHR-220 Power Supply

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

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

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

Tektronix 2213 focus repair

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

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

Ballantine Model 300-E Sensitive Electronic Voltmeter Instruction Manual

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.

Ballantine 300-E

© Steve Byan 2011-2016