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Homebrew sBitx LPF Leak 2 

KK4DAS
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This is the third in a series of videos on diagnosing and debugging problems with the transmit chain on my homebrew sBitx transceiver. On this multi-band transceiver only one low pass filter should be in the circuit at a time. In the last video I demontrated with LEDs that more than one relay was being engergized. But sometimes the more you work on a rig, the more problems you cause or find. This video shows the next step in the debugging process and a couple of side trips along the way.
More details on the sBitx rig and this problem on my blog:
kk4das.blogspo...

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21 окт 2024

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Комментарии : 1   
@andye2005
@andye2005 2 месяца назад
Something is getting onto the other control lines when you switch to CW. Hang a scope on them and see what is there. It may be necessary to decouple the lines very strongly. A small Pi network is the usual method used in commercial kit. It's simply a C-L-C network. There are SMD components designed to do that, and you will see them on almost every on every wire going on or off board, and they use dozens of them. Obviously a Home brew solution will use discrete components. Shielded control wires is another option.
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