[RTTY] INRAD filter question

[Jim W7RY]

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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>> > Checked by AVG - www.avg.com
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>> > 09/25/10
>> > 10:45:00
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>
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> 10:45:00
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