Re: LF: RE: Re: Testing WSPR-15 on 630m

[Stefan Schäfer <Stefan.Schaefer@iup.uni-heidelberg.de>]

Hi Victor, MF,

There was something wrong again last night. The last decodes were from 
0:30 UTC. I reduced the drift significantly by using the fan. It should 
be no problem for WSPR-15 that way. I also think the timing is not the 
problem. So maybe the 5V reference voltage isn't stable. I will go on to 
check this.
73, GL es looking forward to your photos.

Stefan

Am 05.02.2013 08:40, schrieb Victor van Kooten:
> Hello Stefan,
>
> I don't know how sensitive wspr15 is for drift,maybe this is a cause
> for lost decodes.Maybe you can change the xtal osc for a tcxo or a
> ocxo,they are very cheap these days,ofcourse it depends on the freq. you
> use.
> Your construction isn't that ugly,This evening I will send you some
> pictures of my own experiments,
>
>
> 73,GL
>
> Victor
>
>    
> > > > Stefan Schäfer<Stefan.Schaefer@iup.uni-heidelberg.de>  04/02/2013
> > > >          
> 23:26>>>
> Hi Victor,
>
> Thanks for the feedback. Yes i see i'm drifting. Not so fine. There
> were
> some missing decodes. Must have been due to the timing or maybe the
> drift?
>
> My TX converter is quite an ugly construction. It was grown from a very
>
> temporary arrangement of a few electronic parts. The drift may come
> from
> some nearby parts (The ICL7667 and a 78S05) which become warm during
> TXing and feed the heat to the xtal. I will investigate...
>
> 73, Stefan
>
> Am 04.02.2013 22:04, schrieb victor13@online.nl:
>    
> > Hi Stefan,
> > your signal on the waterfall
> > Victor
> >
> >      
>