[RTTY] AFSK to FSK converter

[Joe Subich, W4TV]

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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