Posts Tagged ‘Test Equipment’

Thunderbird Hamfest 2019

One of my favorite hamfest did not disappoint me this year. I always find good bargains on tools and equipment at this hamfest. My first purchase was an MFJ-267 1KW Dummy Load/Wattmeter.  The seller had all of his equipment priced at the exact same point – $68.00.  That seemed a good enough price that I […]

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Universal Component Tester

While cleaning up some shelves in the shop last week, I came across one of those cheap little component testers that I bought from some forgotten vendor in the past.  These are pretty convenient to identify unknown components and do a simple functionality test of all kinds of components.

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Heathkit TC-1 Tube Checker – Theory of Operation – Quality Check

The Quality Check is the main function of the TC-1 Tube Checker.  In this mode, the tube is connected into the circuit to act as a simple diode.  No effort is made to find how much gain a given tube might have in other configurations.  This is a very basic test of how well the […]

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Heathkit TC-1 Tube Checker – Theory of Operation – Filament Check

The TC-1 uses a neon bulb to sense relatively higher current flow in the plate circuit of the tube under test.  It uses this function in order to detect short circuits between the various elements of the tube. It uses this same circuitry to test whether a filament has continuity or is open.  To set […]

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Heathkit TC-1 Tube Checker – Theory of Operation – Line Set Mode

Theory of Operation: Line Set Mode In Line Set Mode, the TC-1 is set up to measure the 115 volt winding of the transformer, and set it to 115 volts, regardless of a variation in the line input voltage.  This allows the checker to give valid go/no-go checks of tube emissions even if the line […]

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