math’s notes
In keeping with our goal to provide interesting low-cost ideas that may hopefully convince you to get out the “old soldering iron,” here are three more.
A Non-Inductive Dummy Load
In January, we described how to make a simple dummy load for testing your transmitter with a bunch of 2-watt carbon resistors and some simple copper sheet metal parts. Well, for those of you who do not want to start cutting copper and drilling a bunch of holes (not to mention soldering with a really large solder iron or gun), there is an even easier way. This is by the use of non-inductive resistors that have actually been on the market for shows the MP930 30-watt and the MP9100 100-watt devices. You can see full specifications as well as the wide range of resistance values at <>, but for our purposes, the 50-ohm devices will be what you need. These are also stocked by many electronic distributors such as Mouser Electronics and Digi-Key and cost is approximately $10.
