> The ARRL review indicates that by manually selecting the 500 Hz
> filter, the radio noise comes up appreciably. Mine does the same.
Interesting -- especially since I'm waiting delivery on 1.8Khz and 500Hz
filters from T-T :-)
Perhaps the real question is what happens to the signal on a relative
basis, and if something about the 500Hz filter and/or gain stage to
equalize levels is affecting the effective SNR.
Grant/NQ5T
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