[RTTY] INRAD filter question

[David VE3VID]

Okay, so you think if I adjust my IF shift it will help?

 

When I click either filter in its like a dead band as I tune along.   Like a 60db attenuator is on.

 



 


> From: w7ry at inbox.com
> To: ve3vid at hotmail.com; rtty at contesting.com
> Subject: Re: [RTTY] INRAD filter question
> Date: Sat, 25 Sep 2010 19:14:30 -0700
> 
> you can probably use the BPF and IF shift to center LSB into the filters 
> passband. Then you will have to use 2125/2295 for tones.
> 
> 73
> Jim w7RY
> 
> 
> --------------------------------------------------
> From: "David VE3VID" <ve3vid at hotmail.com>
> Sent: Saturday, September 25, 2010 7:06 PM
> 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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> >>
> >>
> >>
> >> >
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> >> > 10:45:00
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