[RTTY] INRAD filter question

[Jim W7RY]

If the rig is truly dead, do you have the filters in the correct slots?

73
Jim W7RY


--------------------------------------------------
From: "Joe Subich, W4TV" <lists at subich.com>
Sent: Saturday, September 25, 2010 8:00 PM
To: <rtty at contesting.com>
Subject: Re: [RTTY] INRAD filter question

>
> > Okay, so you think if I adjust my IF shift it will help?
>
> If the IF shift has enough range it will work.  Find a "dead"
> place on the band, select the narrow filers and turn the IF
> shift one way or the other to the stops and see if you hear
> noise come up.
>
> 73,
>
>    ... Joe, W4TV
>
> On 9/25/2010 10:39 PM, David VE3VID wrote:
>>
>> 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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>>>>>
>>>>>
>>>>>
>>>>>>
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>>>>>> 10:45:00
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>
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> Checked by AVG - www.avg.com
> Version: 9.0.856 / Virus Database: 271.1.1/3159 - Release Date: 09/25/10 
> 10:45:00
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