Bertel your path should be okay. i suggest starting with the kit assembled without the PA, operate it QRP to see that everything is working. at this point you ONLY need a 5 volt supply - the current i

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I wish to make an amplifier for WSPR on 8m (40 MHz). RD15HVF1s are likely to outperform IRF510s in the 5, 10, and 50W QRP-Labs amplifiers. These cost $20 each at RF Parts, and Amazon no longer offers

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Has anyone done mods to use the 5Watt PA on the lower VHF bands 6 and 2meters? The assembly instructions hint that is may work on those bands. The suggestion of substituting the IR510 for the RD15HVF1

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Dear all, On most class C and D amplifiers the IRF510 is followed by a trifilar or bifilar transformer toroid. Can someone please explain what the function of the this type of transformer is. (is it f

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