Re: Looking to ID a diode in a 1S1 sampling plug-in


Sean Turner
 

I uploaded a small album of this plug-in: https://groups.io/g/TekScopes/album?id=261202

On the third picture, another curiousity is the tunnel diodes (circled in red). These do not look like any Tek tunnel diodes I've seen, and they show signs of soldering that is decidedly not up to the standards of factory Tek soldering. Whether this is a symptom of being a prototype (serial number 11 after all) or later work, no idea. D430 (the uppermost one circled) also has a weird curve with only a very tiny negative resistance region (though it is 10 mA), and the manual calls for a TD253 which is a metal package IIRC.

Sean

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