Message-ID: <5C5891A3.9080408@posteo.de>
Date: Mon, 04 Feb 2019 20:25:23 +0100
From: DK7FC <selberdenken@posteo.de>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3
MIME-Version: 1.0
To: rsgb_lf_group@blacksheep.org
References: <1771146765.20190204122151@gmail.com>
In-Reply-To: <1771146765.20190204122151@gmail.com>
Subject: Re: LF: Naive WSPR15 question
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org

Hello Chris,

For a clever person it is very easy :-)
It will depend on which way you want to generate WSPR.
Here, for example, i have a Raspi which generates my WSPR (2) for MF. I 
modified the c source code so that the frequency is 4 times higher and 
the frequency shift is 4 times higher too. In my PA, probably like in 
yours, there is a frequency divider using CD4013 ICs which reproduce the 
desired frequency and frequency shift. Of course this can be done with a 
factor 2 too.
For Windows solutions, there is DF6NMs tool for slow WSPR which works 
very reliable here, for WSPR-2 and WSPR-15. I'm sure this can be 
modified for twice the frequency shift but then you will need an 
upconverter to convert it to LF or MF...

73, Stefan

Am 04.02.2019 13:21, schrieb Chris Wilson:
>
> Hello  LF,
>
>    A  naive  question  re  WSPR15  please?  Assuming the source code is
>    available  how  hard  would  it  be  for  a  clever person to add X2
>    functionality to it? Thanks.
>
>