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Re: [RTTY] AFSK to FSK converter

To: "Joe Subich, W4TV" <lists@subich.com>
Subject: Re: [RTTY] AFSK to FSK converter
From: "Doug Faunt" <faunt@panix.com>
Date: Mon, 17 Sep 2012 08:52:25 -0400
List-post: <rtty@contesting.com">mailto:rtty@contesting.com>
That's a whole another issue.  If the decoder is really good, it's
unfortunate he's come down hard on one side of the religious FSK vs AFSK
divide.

I've not looked at 2Tone at all yet.  The only reason I noticed this is
because I'm between non-ham adventures, and seriously jet-lagged.

73, doug


> On 9/17/2012 6:40 AM, Doug Faunt wrote:
>  >
>> But the K4DSP unit should be simple enough to wire up on perf-board-
>> there are only a dozen components aside from the connectors.
>
> The question is whether the K4DSP unit (QST article here for members:
> http://p1k.arrl.org/pubs_archive/139117) will even work with 2Tone.
>
> The developer of 2Tone refuses to adopt a fixed frequency mode - it's
> AFSK only with AFC running all the time.  Since the K4DSP interface
> expects to decode fixed frequency tones (2125/2295 or 1275/1445) how
> well does it work with "drifting" inputs?
>
> The lack of *fixed* inputs may be a serious limitation with any
> regenerator - whether it be the K4DSP design of a simple PLL tone
> decoder:
> www.electroniq.net/radio-frequency/fsk-demodulator-using-lm565.html
>
> 73,
>
>     ... Joe, W4TV
>
>
> On 9/17/2012 6:40 AM, Doug Faunt wrote:
>> It's not been mentioned on the RTTY list before, just N1MM-digital, and
>> I'm not getting those emails (not enough bandwidth most of the time).
>>
>> But the K4DSP unit should be simple enough to wire up on perf-board-
>> there
>> are only a dozen components aside from the connectors.
>>
>> 73, doug
>>
>>
>>> ORIGINAL MESSAGE:
>>> On Mon, 17 Sep 2012 02:41:15 -0400, Doug wrote:
>>>
>>>> Obviously, I've missed something- what's "2 Tone" in this context?
>>>> Google
>>>> isn't being helpful.
>>>>
>>>> 73, doug
>>>
>>> REPLY:
>>> It's a new program which can replace MMTTY but only with N1MM.
>>>
>>> Check the archives back a week or two.
>>>
>>> 73, Bill W6WRT
>>> _______________________________________________
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>>>
>>
>>
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