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I'm with electrojohn on this one, the AA5 configuration is something that worked well with a minimum of parts. You can learn the skills you need to know on one of these relatively cheap sets before graduating to the more elaborate ones.
Don't skimp on the digital meter; make sure the ohms scale goes above the usual 2 megohm limit because the AVC resistor is usually 2.2 megohms and the first audio grid resistor is usually 10 megohms. I have one meter with a 20 megohm limit and another with a 30 megohm limit.
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