Robert McGwier wrote:
>
>
> The 2 KHz numbers in the ARRL review are ..... AWFUL.
>
> The 2 KHz BDR is 64 dB on 80 meters.
> The 2 KHz IP3 is -19 dBm. That is not PLUS 19 but MINUS 19 dBm.
> The 2 KHz IMD dynamic range is 63 dB.
>
> WOW. This is just awful. At 2 Khz, the receiver has basically just
> collapsed. With a strong station just outside of your "500 Hz" filter,
> your receiver will basically be blocked off.
>
> Two S9 signals will produce lots of spurious emissions inside your
> passband due to 3rd order products. Myriad signals adding up on 160
> should introduce lots of ghosts in your passband.
>
Indeed ! In fact, compare these FT-2000 numbers with the QST review of the
FT-1000MP + Inrad roofing filter in February 2005 QST. The FT-2000, with its
built-in Yaesu roofing filters, has worse 2 kHz IMD numbers than an FT-1000MP
without any roofing filters whatsoever ! How could they have screwed up the
FT-2000 design so badly ?
73,
Steve, N2IC
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