Re: The harmonics are out to play
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Don,
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A bandpass for 40M will not be sharp enough to rapidly chop off after 7.2 MHz. There are many stations images between 7.1 and 7.2 that make a mess of the band on BITX40 I am going to try a filter for the VFO or a hack to see if I can get rid of 19-20 Mhz harmonics. 73 Raj At 14-03-2017, you wrote:
Raj: How about an EXTERNAL filter? If that's the only station troubling you then you could trap it out. A bandpass filter for just the 40m amateur band would clean up your signal even further and eliminate all the rest. Even a sharp cut-off low pass on the antenna side might do the trick. -Don, ND6T |
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