[RTTY] Kenwood IF filters ???

[WS7I]

I have used stacked 250 Hz filters for over 20 years in RTTY contesting and they just simply work.  

Had them in old Icom 751's and the Kenwood 850 which I used for a while. I have them in the Yaesu FT-1000D even tho I add to add the final one as it didn't come stock with it.  

I do have a 350 Hz filter in my Icom 706 as I tried them both and liked that one as I use it for DXing and DXpeditions as well as contesting.

I do use 500 Hz for most DXing.



---------- Original Message ----------------------------------
From: "Tom Osborne" <w7why at verizon.net>
Date:  Thu, 18 Feb 2010 19:52:26 -0800

>
>I also use 250 cycle filters here in my TS-450's.  I like them for RTTY 
>contesting.  Seems like 500 is too wide for my comfort level.  73
>Tom W7WHY
>
>
>
>
>I only use 250 Hz filters in both IFs.  Both in my analog rigs and in my
>Icom 7600.
>
>73
>Jim W7RY
>
>
>> Hmmmm ???  Okay.  I am using MMTTY.  WPX last week was my first contest. 
>> I
>> wasn't aware MMTTY did filtering.  My TS-450s has the stock filters for 
>> SSB:
>>  6khz in the 8.83mhz passband an 2.4khz in 455khz IF.  Obviously those
>> filters are frustrating for RTTY.
>>
>> Show of hands please from users with TS-850s & TS-450s - 2 x 400hz filters
>> for both IF stages, or 2 x 250hz filters in both.  Is my logic correct?
>>  RTTY signals are "supposed" to be 170hz wide, so a 250hz filter would be
>> optimal......yes/no.......(circle one hihi)
>>
>> Al (KE1FO) - why did you find the narrow filters frustrating?  Can you
>> comment on "MMTTY filtering"?
>>
>> David
>> VE3VID
>
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