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Re: LF: RE: Re: ROS s/ware

from [Gary - G4WGT] [Permanent Link][Original]
To: [email protected]
Subject: Re: LF: RE: Re: ROS s/ware
From: Gary - G4WGT <[email protected]>
Date: Fri, 30 Apr 2010 21:30:01 +0100
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Hi Rik,

I am not really in favour of the wide modes ie. 500 Hz on our small band, but I will be running the EME mode (64 Hz) regularly for a while & may increase power on some nights Txing for greater distance reports. Tonight power is 5 watts, 15mW ERP estimated.

Not disturbed by any comments which may be posted as it is good to know other peoples feelings. As long as I know that I am not abusing the system or breaking any rules I feel that should be OK with most others who use the band.

Thanks & 73

Gary - G4WGT


On 30 April 2010 21:13, Rik Strobbe <[email protected]> wrote:
Hello Gary,
 
sorry, I overlooked the 500Hz version.
But even that mode is "no go" for me (and several others). ON, PA and maybe other countries have a 100Hz bandwidth limit. Taking into account that the band is only 3kHz wide this limit makes sense to me.
ROS-EME would be OK in regard with bandwidth, but I am not sure the coding is public (what is a requirement in Belgium).
 
73, Rik  ON7YD - OR7T
 
Van: [email protected] [[email protected]] namens Gary - G4WGT [[email protected]]
Verzonden: vrijdag 30 april 2010 22:02

Aan: [email protected]
Onderwerp: Re: LF: RE: Re: ROS s/ware

Rik, LF,

ROS EME mode is 64 Hz wide apparently & the version (16 & 8 baud) Graham & I were using tonight was 500 Hz wide.

73

Gary - G4WGT.


On 30 April 2010 20:43, Rik Strobbe <[email protected]> wrote:
the EME version has less than 100Hz bandwidth.
The other ROS modes are several kHz wide and not suited for 501-504kHz.
What about JT2 or JT4 as an alternative ?

73, Rik  ON7YD - OR7T
________________________________________
Van: [email protected] [[email protected]] namens Dave Sergeant [[email protected]]
Verzonden: vrijdag 30 april 2010 20:33
Aan: [email protected]
Onderwerp: LF: Re: ROS s/ware

On 30 Apr 2010 at 19:03, mal hamilton wrote:

> Pete
> I see what u mean. I have checked the freq of interest and concluded
> that it is not a suitable mode for the narrow 500 kcs slot available to
> us. I wonder what is next on the appliance operators list. g3kev

For once I am afraid I agree with Mal...

ROS created quite a stir when it first appeared on HF earlier in the
year. Their first suggested working frequency on 20m put it splattering
right over the IARU beacons on 14100, which it seems the developers had
never heard of. They soon moved it.... And of course the FCC have
decreed it is not legal in the USA because it is 'spread spectrum'
which is not allowed below 220MHz.

What advantage has it over the other digital modes which have been
trialed on 500kHz? It is right that we should support these various
digital modes (but none of them turn me on at all) but we should not do
so at the danger of making the band unusable for other operators (and
QSOs...).

I am not on transmit mode at the moment, just receive.

73 Dave G3YMC

http://www.davesergeant.com


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