MiniPA70 HF Linear RF Amplifier. Simple Low Pass Filter for 20 Metre Band. Ham Radio.

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Correction it's for the 20Metre Band not 40 as waffled in video.

The MINIPA70 is a low cost Linear RF Amplifier with 5Watts in and over 50Watts out. In kit form but does not come with a Low Pass Filter or instructions in the kit. It took me ages to work out how to make one for the 20metre band. Hope you like it.
  1. George and Jane
  2. LPF
  3. Low Pass Filter
  4. ham radio
  5. amateur radio
  6. minipa70
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Комментарии
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So Basicly Its From 80 Meters To 20 Meter Band From The Nano Vna What I Could Understand, Did I Said Something Wrong?

frequencywatchers
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BTW, Don`t You Hate When You Always Have To Recharge Your VNA Just To test Something? I Found A Methode To Solve It, Just Put The Small Diodes Onto The Battery Wires So There Is No Unneceserry Electricity Flow When Its Off, Then Change The Battery To A Bigger One, I Done That With Mine And Since Then I Can Work With My VNA NON STOP For About 3 Hours Now :)

frequencywatchers
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George you have to many turns try 9 turns on the input and 9 turns on the output and 13 turns in the center it should drop at 14MHz. 180pF is good. Good luck

Mr.Amplifier.
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hello...what firmware use on your nanovna?

nikaldo
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That is a terrible design low pass filter, the through loss should be no more than 0, 5 db. at 14Mhz. The rejection should be a minimum of 50db at 28Mhz. There are many online design tools that would give you a much better design.

Yuēhàn