[CQ-Contest] IC756PRO vs International Radio filters

k6ll at juno.com k6ll at juno.com
Thu Mar 9 14:09:02 EST 2000

On Thu, 09 Mar 2000 14:26:32 -0500 (EST) 00tlzivney at bsuvc.bsu.edu writes:
> In conjunction with my earlier post comparing measured specs for
> a variety of contesting rigs, I offer the following measurements of
> filter selectivity.  The filter measurements for the IC756PRO are 
> from
> Peter Hart's RadCom review; those for the International Radio are 
> from
> their website.
>                       -6dB          -60dB
> IC756PRO 2.4kHz        2520 Hz      3560 Hz
>          250 Hz         263 Hz       859 Hz
> IR TenTec filters
>  #756    2.4kHz        2488 Hz      3575 Hz
>  #751    250 Hz         340 Hz       680 Hz
> Seems that the "old fashioned" technology has nothing whatever to
> fear/envy the new toys.
> Terry Zivney, N4TZ/9
> n4tz at arrl.net

I had only a couple of minutes with the PRO at a SCCC club
meeting, but found that the narrower (<250) settings of the cw
DSP were very usable, with little or no ringing, and
the -60 dB points were MUCH narrower than the cascaded 500's
in my TS-850. I think it has potential. The best way to tell
is for a sharp operator to run the rig in a CONTEST, and give
us a report.

Dave Hachadorian, K6LL
Yuma, AZ
K6LL at juno.com

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