LF: Re: Testing upgraded 500KHz system -- reports tks

["Markus Vester" <markusvester@aol.com>]

Hi Mark,

 

yes, you are producing a nice signal into Nuernberg. What seems a little odd is that both Nicolas and Roman show it on 502.200 kHz, whereas my reading would be more like 502.225. Give or take a pixel on the ruler, but my cal shouldn't be that far off...

 

Reading about wind, moisture and antenna voltage effects sounds very familiar - my 200 pF on 137 k is definitely a fair-weather-only type ;-)

 

Best wishes

Markus, DF6NM

 

 

----- Original Message -----

From: "Mark" <markhughes1@blueyonder.co.uk>

To: <rsgb_lf_group@blacksheep.org>

Sent: Thursday, April 10, 2008 9:34 AM

Subject: Re: LF: Testing upgraded 500KHz system -- reports tks

> Roman, Nicolas
> Thanks for the reports guys    
Sure was weak Roman, hope stronger on the 
> other antenna, but does look 
like it may have been me.
> a little more work to interface the PC, then I 
can have the system in beacon 
> mode more easily.
> 
> 10dB 
more power sure does get things warmer. I have killed several FETS, had 
> 
mica caps sweating wax, toroids getting so hot you can smell them and 
> 
insulators on the antenna complaining. The plus side is that I can now 
> 
strike a flourescent tube by putting it within a few cm of the antenna, and 
> it keeps going like a light sabre a little away from the antenna.  
Oh and 
> the signal seems to get a bit further :<)
> All good 
fun
> Regards
> Mark GM4ISM IO85AR
> www.dc2light.co.uk
> 
> 
>

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