Author: N4GA – Rob
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HP ESP 120 Power Supply
Ok, I’ll come right out and say it: I think the HP ESP120 is one of the best 50V power supplies you can get for home brew LDMOS RF Amplifiers. There, I said it. First, there’s the price. If you stalk eBay and wait for a seller that has a bunch of these to sell,…
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Dummy Loads
If you’re going to be building and testing amplifiers, you’ll need a high power dummy load or attenuator. The latter basically being the former with a way to tap off a highly attenuated signal, to feed a Spectrum Analyzer, for example. These dummy load attenuators can get very pricey. Here’s the gold standard, the Bird 8329-300 High-Power…
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Testing a 2x MRFX1K80H LDMOS Amp
The other day, a fellow amp building buddy asked me what I was seeing for performance on my double MRFX1K80H LDMOS Amp. I pulled out the ole dummy load and set up this quick test bench. On the left you can see the home made ~4kW dummy load. Amp in the middle and LP-100A…