Topband: Collins R390 and 75A4 on 160m

[btippett@alum.mit.edu (Bill Tippett)]

        Oops, I forgot to show the R390 Blocking Dynamic Range
of 130 dB.  It is meaningless anyway since the measurement was
done at 100 kHz spacing compared to 5 kHz for the ARRL data.

                                          73,  Bill  W4ZV