Some old Instruments of my collection
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Today my Hewlett Packard 6236B power supply went up into Smoke |
Some compare of soldering irons
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A simple tool to measure plate current of 300B, 2A3, 45 tubes
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Tube testers 
Also an instrument 
Heathkit IT-28 capacitor tester
Weller WECP-20 is my favorite solder iron. Read here some information about it, and how to do a modification for a red-green LED. 
This is really something very simply and unspectacular,but extremely handy to measure plate current in random amplifiers.