Re: LF: Re: VLF/LF-Preamp

[Chris Dillon <c.r.dillon@dsl.pipex.com>]

Hi Peter
Sorry I missed your earlier posts in the change to Yahoo Groups. I'd 
like to try a balanced probe - are you using the same circuit (with 
INA111) as on the www.vlf.it site or have you modified it?
73 Chris G3WCD





On 29/05/2012 20:39, pws wrote:
> Moin Stefan,
>
> You wrote:
> > ...
> > How sensitive is the balanced probe to shielding effects (trees, 
> > houses)?
> Don't know yet. But see those screenshots. There are much less
> local interference lines visible.
>
> > Any difference to the E field probe?
> This IS an e-field probe, but a balanced one.
> Got the idea from there:
> http://www.vlf.it/immagine/minimal_E.html
> (tnx)
>
> > Where do you have the INA111 from?
> From Farnell, the TLE2426 voltage splitter too.
>
> > What are the differences on 137 kHz? Is there a significant S/N 
> > improvement?
> Not tested yet. But as I wrote it should work.
>
> Peter, df3lp