[Elecraft] K3: best roofing filter on RTTY

[Jim's Desktop]

The narrowest filter I have in both receivers is the 400 Hz one.  I 
borrowed a K3 that had a 250 Hz filter in it once and tried it on RTTY.  
It works, but it's right on the margin of being too narrow.  If someone 
is using one of the older Packet TNC's that have RTTY mode in them (they 
used 200 Hz shift instead of 170 and there are still a lot of them out 
there) it's really hard to get them tuned in with a 250 Hz filter, 
especially in weak signal/selective QSB situations.  The 400 Hz filter 
doesn't seem to have that limitation though it does let slightly more 
noise in (easily handled with the DSP filters anyway.

Jim - W0EB
>
>On 2/15/2015 11:35 PM, David Cole wrote:
>>Hi,
>>I ordered and use the 400 for RTTY, I suspect the 250 is a bit to
>>narrow.
>
>______________________________________________________________
>Elecraft mailing list
>Home: http://mailman.qth.net/mailman/listinfo/elecraft
>Help: http://mailman.qth.net/mmfaq.htm
>Post: mailto:Elecraft at mailman.qth.net
>
>This list hosted by: http://www.qsl.net
>Please help support this email list: http://www.qsl.net/donate.html
>Message delivered to w0eb at cox.net