Re: RD15HVF1 x RD06HVF1 (not the IRF510)
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I'm not sure what your overall goal is. Just experimentation for now or making the PA as broad banded as possible? Again from my last note it is likely that T1 has too much inductance above 24 MHz or so. You should back off the number of turns on T1. My rough calculations say that 7 turns is optimum (instead of 10) above 24 MHz. The blocking capacitors are too large too (although this is less of a problem). They should be 0.1 at 30 MHz and 0.01 at 50 MHz. Some experimentation is required to find the optimum. One thing, it looks like something may be wrong with your 18 MHz filter. You might check to make sure it is built correctly.
If i get a chance, ill build my PA kit this weekend. I will use mine on 144 MHz so this should be a real challenge.
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On Feb 23, 2017, at 8:25 AM, Roney Monte <roneymonte@...> wrote: