[RTTY] INRAD filter question

[David Levine]

David,

I have a Kenwood TS-2000 and used the SignaLink at first and still use it for modes other then RTTY. On the TS-2000 you need to run FSK to take advantage of the built in filters. A friend made me a custom interface from parts he already had and I've been running FSK ever since. The filters make all the difference in the world in contest when signals are on top of each other. 

David - K2DSL

-----Original Message-----
From: David VE3VID <ve3vid at hotmail.com>
Sender: rtty-bounces at contesting.com
Date: Sat, 25 Sep 2010 22:06:41 
To: RTTY contest group<rtty at contesting.com>
Subject: Re: [RTTY] INRAD filter question



The laptop is a Gateway running XP,  N1MM,  into a SignaLink USB outboard sound card,  into the ACC port on the TS-450s.  I am neither for or against true FSK, just the SignaLink allows me to do many other types of "sound card" digital modes such as PSK and Olivia.

 

I was able to do RTTY no problem with the system before the 400hz filters


 


> From: w7ry at inbox.com
> To: ve3vid at hotmail.com; rtty at contesting.com
> Date: Sat, 25 Sep 2010 18:52:16 -0700
> Subject: Re: [RTTY] INRAD filter question
> 
> FSK is MUCH better than AFSK.... What are you using for a computer and 
> software? I use windows XP and MMTTY with N1MM. Works just fine in FSK 
> mode.
> 
> Is there a particular reason you don't want to run FSK?
> 
> 73
> Jim W7RY
> 
> 
> --------------------------------------------------
> From: "David VE3VID" <ve3vid at hotmail.com>
> Sent: Saturday, September 25, 2010 6:48 PM
> To: "RTTY contest group" <rtty at contesting.com>
> Subject: Re: [RTTY] INRAD filter question
> 
> >
> > Wow. Well if thats the case it was an expensive waste of $300.
> >
> > However, why would the filters be unusable in AFSK(LSB)? Dont they just 
> > narrow the IF bandpass to 400hz?
> >
> >
> >
> >
> >
> >> From: w7why at frontier.com
> >> To: rtty at contesting.com
> >> Date: Sat, 25 Sep 2010 18:43:48 -0700
> >> Subject: Re: [RTTY] INRAD filter question
> >>
> >> Hi David
> >>
> >> I have the same setup as you--2 Inrad filters. They won't work in AFSK.
> >> You have to run FSK to use the narrow CW filters. 73
> >> Tom W7WHY
> >>
> >>
> >> >
> >> > Ummmm.......nope. I had the rig in LSB (AFSK). And the tone pair as set
> >> > by MMTTY is 2125/170
> >> >
> >> >
> >> >
> >>
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