I reported in a previous post that a nearby 5000W AM station was bleeding through in the microvolt level. Today, I threw together a quick and dirty 40M bandpass filter. That solved the BCI problem, but in my haste, I somehow blew up the Nano board for the 3rd time. The receiver’s working now but I’ll have to put in an order for 5 or 6 more Nanos.
Quick and dirty 40M bandpass filter
Ironically, now that the BCI is gone, the band is somewhat dead. It does pick up signals though. Yesterday there was a contest and I heard lots of CW and SSB signals. It’s pretty broad though. Gotta get that 8-pole audio lowpass filter installed.
W3JDR Bright Ideas 
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