[1000mp] 1000MP Filter recommendation request

Kok Chen chen at mac.com
Thu Sep 30 20:52:06 EDT 2004


On Sep 30, 2004, at 3:21 PM, Joe Subich, K4IK wrote:

> You may not find the cascaded 250 Hz filters very usable
> for RTTY as their overall bandwidth approaches the minimum
> required bandwidth (about 220 Hz) for 45.45 baud/170 Hz shift.

The cascaded 250/250 INRADS are fine on my FT-1000MP.  You just need to 
tune carefully.  I use it when S&P'ing in a crowded contest.  If you 
are CQ'ing, you would need a wider filter to print those who answer off 
frequency.

Come to think of it, I don't have problems printing TNCs with 200 Hz 
shifts (or the ops who have set their shift during a contest to 187 Hz 
as a compromise between the RTTY standard and the 200 Hz shift guys).

73
Chen, W7AY


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