Vacuum-dehydrating hygroscopic components...

My next trick will be doing the same thing to carbon composition resistors that have drifted high.

Those things are fairly porous and tend to suck up moisture if not stored wisely. I throw a desiccant packet in with all my CCs.

One of my little projects that I've adopted for myself is buying up all the vintage crybabies so nobody else can have one. I call this strategy the "de beers".

Anywho, as I've been documenting and yada blahing these things, I've been measuring each resistor to see what's gone out of spec. Then, I replace with a suitable 1/2 watt CC.

Which means I'm gonna have a ton of carbon composition resistors that might have drifted from heat, or might have drifted from moisture. I'll make the next one a bit more scientific with like...ya know...little things like accurate measured values before and after.

I suspect that these 2N4105s are not going to be particularly useful. Which is a bummer, but not unexpected. Always take a chance when ya buy vintage components. I'll keep em around and give em all a round to confirm the leakage values.
 
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