[600MRG] Modes?

[Neil Klagge]

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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