[RTTY] Kenwood IF filters ???

[David VE3VID]

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

 

> Date: Thu, 18 Feb 2010 12:57:29 -0500
> Subject: Re: [RTTY] Kenwood IF filters ???
> From: al at frugoli.info
> To: ve3vid at hotmail.com
> 
> Be careful. 400 is often as narrow as you wat to go, especially if
> you're contesting. I find that the filtering MMTTY can do is adequite
> in 99% of the cases with a 400hz filter.
> 
> The TS940 I used to use had a 250 filter and it was frustrating when
> trying to s&p during contests.
> 
> 73 de AL, KE1FO
> 
> On 2/17/10, David VE3VID <ve3vid at hotmail.com> wrote:
> >
> > Thanks for the Inrad URL Jim..........the 250hz filters would likely be
> > exactly what I need
> >
> > :)
> >
> >
> >
> > David
> >
> >
> >
> >
> >
> >
> >
> > Date: Tue, 16 Feb 2010 14:55:23 -0800
> > From: w6eu at sbcglobal.net
> > To: ve3vid at hotmail.com
> > Subject: Re: [RTTY] Kenwood IF filters ???
> >
> > http://www.inrad.net/home.php?xid=369e20e231649e0ad9497f17437841f8
> >
> > Try this website, David
> >
> > 73, Jim W6EU
> >
> >
> > David VE3VID wrote:
> > What is "Inrad".........a manufacturer? Do you know where they are
> > available?
> >
> >
> >
> >
> >
> >
> > From: ww3s at zoominternet.net
> > To: ve3vid at hotmail.com
> > Subject: Re: [RTTY] Kenwood IF filters ???
> > Date: Tue, 16 Feb 2010 17:38:03 -0500
> >
> > I have an 850, but the filters are the same....I use a set of 400 hz Inrad
> > in both IFs....
> >
> > On 2/16/2010 5:36:25 PM, David VE3VID (ve3vid at hotmail.com) wrote:
> >
> >
> >
> > Are you working RTTY with a Kenwood TS-450s? Which of the optional IF
> > filters do you use? There are filters for the 455khz and 8.83mhz
> > passbands. Which would work best for RTTY. I've done a little bit of
> > RTTY without the filters just to cut my teeth, but the narrow IF filters
> > are obviously necessary.............any infor would be appreciated.
> >
> >
> >
> > David
> >
> >
> >
> > VE3VID Located in rural Canada
> > Solar power. Wood heat.
> > Mosley tribander @ 22m
> > 2element delta-quad on 40m
> > Lots of space for dipoles,
> > bears and wolves......73
> >
> > http://www.ve3vid.webs.com/
> >
> >
> >
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> -- 
> Sent from my mobile device
> 
> 73 de Al, KE1FO
> 
> -----
> Check out my Amateur Radio Contesting blog at ke1fo.wordpress.com.



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