Posts Tagged ‘Boatanchor’

Heathkit C3 Condensor Checker – 25 Volt Mod

As noted in my previous post, the 25 volt scale for the leakage test function of the Heathkit C3 Condensor Checker provided a voltage that was considerably higher than 25 volts.  It was closer to 50 volts.  This seems to be a design flaw, or a documentation flaw, as I don’t know which side of […]

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Thunderbird Hamfest Haul 2018

I attended the Thunderbird Hamfest in Peoria yesterday.  There were a few bargains to be had.  While many sellers were expecting the high Ebay prices for their old junk, there were still a few that were actually looking to sell their goods. I started out with a purchase of some connectors and adapters from one […]

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Heathkit C3 Condenser Checker – Restoration

Ok, I’ve received my order from justradios.com.  Now it’s time to replace almost all of the capacitors and a good number of the resistors in the C3 Condenser Checker.  We’ll follow that up with a basic checkout, and finally finish up by testing the caps and resistors that we pull out. Here is what we […]

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Heathkit C3 Condenser Checker – How it Works Part 3

In Part 1 of this series of posts, I introduced the Heathkit C3 Condenser Tester Wheatstone Bridge operation. In Part 2, we traced out the schematic of the Resistance and Capacitance measurements. Here in Part 3, we will delve into the Leakage Test function of the tester. The Leakage test operates by placing a selectable […]

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Heathkit C3 Condenser Checker – How it works

The circuit description in the C3 manual does not go into many details about how the circuit works.  Although the circuit diagram is not drawn in the familiar layout for one, it may be traced out to arrive at a reasonable resemblance to a wheatstone bridge circuit. (credit diagram below to https://goforaplusplus.wordpress.com/2011/09/08/wheatstone-bridge/)

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