[600MRG] Modes?

[Edward R Cole]

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
>
>On 2/8/2014 4:14 PM, Jim Miller wrote:
>>As a follow up:
>>
>>Another decision is whether to presume the need for PSK31. It has an impact
>>on the choice of power amp: linear vs class C/E.
>>
>>Any thoughts on PSK31 popularity on this band?
>>
>>Thanks
>>
>>jim ab3cv
>>
>>
>>On Sat, Feb 8, 2014 at 1:19 PM, Jim Miller <jim at jtmiller.com> wrote:
>>
>>>I'm not yet on 600m but working on some sketches for a RSN transverter for
>>>this band for my K3.
>>>
>>>One thing I'm not yet settled on is separate antennas for TX and RX.
>>>
>>>I have beverages that I use on lowbands now that I could potentially use
>>>for 630m. I could also just put up an amplified short vertical for RX if
>>>those don't work well.
>>>
>>>Or I could use the TX antenna (likely a wire vertical with loading top and
>>>bottom suspended by tall oaks) as my RX antenna.
>>>
>>>The latter would need TX/RX switching rather than just overload
>>>protection. This would mean extra work if CW and QSK was desired.
>>>
>>>So (finally) my question: how prevalent is CW now or expected to be as a
>>>mode and do you find QSK on this band to be useful? Do you use normal CW
>>>speeds of around 20-30wpm or is it normally slower and with lots of repeats
>>>and less conversational?
>>>
>>>Thanks!
>>>
>>>Jim ab3cv
>>_______________________________________________
>>600MRG mailing list
>>600MRG at w7ekb.com
>>http://w7ekb.com/mailman/listinfo/600mrg_w7ekb.com
>>
>>
>>
>>
>>Internal Virus Database is out of date.
>>Checked by AVG - www.avg.com
>>Version: 8.5.455 / Virus Database: 271.1.1/5970 - Release Date: 
>>07/06/13 16:46:00
>
>_______________________________________________
>600MRG mailing list
>600MRG at w7ekb.com
>http://w7ekb.com/mailman/listinfo/600mrg_w7ekb.com

73, Ed - KL7UW
http://www.kl7uw.com
     "Kits made by KL7UW"
Dubus Mag business:
     dubususa at gmail.com