[600MRG] Modes?

[Brian Pease]

It may be best to group the conversational modes by maximum bandwidth 
and use RSID to sort them out at the receive end.  WSPR and other ultra 
narrow modes don't use much bandwidth.
On 2/8/2014 6:17 PM, Neil Klagge wrote:
> Another thought to add to the discussion is that of the bandwidth of each
> of the modes. Since there will only be 7 khz available, it seems we need to
> be somewhat conservative with modes being used.
>
> 73, Neil, XSV
>
>
> On Sat, Feb 8, 2014 at 3:36 PM, Eric NO3M <no3m at no3m.net> wrote:
>
>> THOR would be equivalent to a conversational JT9/JT-65.  The nice thing
>> about THOR or DominoEX is that it uses IFSK (incremental shift keying), so
>> there is no need for absolute tuning accuracy.  It goes as far as still
>> being able to decode if you are slowly moving the VFO during reception.  It
>> also handles well under low SNRs, especially with FEC (inherent with THOR,
>> optional with DominoEX).
>>
>> 73 Eric NO3M / WG2XJM
>>
>>
>> On 02/08/2014 05:18 PM, Edward R Cole wrote:
>>
>>> Seems that JT65 and its variants have been successful for making contacts
>>> (it is FSK).  Perhaps we can petition a request to Joe Taylor for a
>>> conversational text version of the program?  Many mw hams have been
>>> experimenting with JT65 and WSPR where such a program would be appreciated.
>>>
>>> High winds this weekend (some areas up to 73mph) have my eme array and
>>> inverted-L lowered.  I did repair the broken vertical wire (one of three)
>>> last week, but have not tested it on 600m.
>>>
>>> 73, Ed - KL7UW
>>>
>>> At 12:36 PM 2/8/2014, John Andrews wrote:
>>>
>>>> Jim,
>>>>
>>>> Should this become a ham band here in the U.S., I would expect some
>>>> PSK31 activity. A lot of software supports it, and people are used to it.
>>>> As you indicate, a linear amp is needed for PSK, and that will be a
>>>> limitation. Also, forward error correction has proven to be very valuable
>>>> with the noise and fading at these frequencies, and PSK31 lacks it. The
>>>> CMSK program by ZL2AFP is an alternative for non-linear PA's, but it
>>>> honestly hasn't proven to be all that robust under real band conditions,
>>>> despite its success "down under".
>>>>
>>>> There are a bunch of other modes suitable for ragchew QSO's, such as
>>>> MFSK and THOR that have FEC, and don't require a linear PA. Unless we get
>>>> to the point that linear PA's  are common, like on HF, I suspect that the
>>>> various FSK modes will be more popular than the PSK variants.
>>>>
>>>> John, W1TAG
>>>>
>>>>
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>
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