20m BITX40 conversion. Dual band w/ Auto Switching

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In this video I show how a second LPF is added to enable band switching above 40m. Relays can be controlled with the Raduino or using the QRP Labs VFO kit, or manually.
  1. MiscDotGeek
  2. BITX40
  3. Amatuer Radio
  4. QRP
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Комментарии
Автор

Great job! I used your instructions and made my BITX40 to be 160/80/60/40m rig, and it works fine for me. Thank you, OM!

vuxvux
Автор

Thank you! I found this useful for pushing me the rest of the way to picking up some filters from QRP Labs and modifying my BitX40. Well done.

ukulelebob
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Hello I’m wanting to add a dds for multi band like yours what’s please can you tell me which resistor you remove before adding lpf to make it open up on all band

Thankyou



73.

cbradiohamfan
Автор

Ryan, I appreciate what you tried to show here, but a cell phone camera leaves a lot to be desired in this video; for me, it makes it difficult to follow just what you are trying to show what you are doing.  I could not use this video to modify my BITX-40.  But please, I do not want to discourage you, but I want to thank you for showing me what you have done.  Keep the mods coming for this radio, and do not forget to show the simple details on what you are doing and the results.  73, Karl,   KO8S

karlschwab