thanks joe,,, Ill print all of this and put in the 850 book-- I am
currently running afsk via the 590 at home and really miss the fsk..
rtty is my favorite mode, and the rtty folks are my favorite qsos
73 john w8wej
On 7/22/2012 23:52, Joe Subich, W4TV wrote:
> John,
>
>> I can only buy one filter, wanting the most filtering for blood and
>> guts 160 cw tests, but open enough to allow for fsk operation.
> When you say FSK operation that fairly clearly puts a "400 Hz" lower
> limit on the bandwidth and leaves you with two choices the 8830 KHz
> (1st IF) filter or the 455 KHz (2nd IF) filter.
>
> The 1st IF filter will provide a bit better RX IMD performance by
> getting the "narrow" filter earlier in the IF chain but the 2nd IF
> filter will provide slightly sharper skirts because of its lower
> frequency. You can see the filter curves at www.inrad.net.
>
> The 1st IF Filter is slightly less expansive than the 2nd. If it
> were me, I'd flip a coin and get one now and pick up the second one
> when conditions/finances allow. Ultimately you will want the pair.
>
> 73,
>
> ... Joe, W4TV
>
>
> On 7/22/2012 6:57 PM, john wrote:
>> I have bought back my 850 to use at my farm for dx/contesting/rtty.
>> there seems to be large number options/filters/if crystals.
>> due to finances I can only buy one filter, wanting the most filtering
>> for blood and guts 160 cw tests, but open enough to allow for fsk
>> operation.
>> any and all suggestions would be appreciate
>> mucho thanks....
>> 73 john w8wej
>>
>> _______________________________________________
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>> RTTY@contesting.com
>> http://lists.contesting.com/mailman/listinfo/rtty
>>
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