Re: LF: 136 kHz TA

[f6hcc 56 <f6hcc56@free.fr>]



Hi Markus,

 

My indoor loop is just under the roof (slates).

There is no metallic parts in the walls and all switching devices (supplies, fluo lights) are disconnected (no ADSL here, only 4G).

The PC used for the capture do not increase the noise.

(The noises on the captures before 22h30 yesterday were caused by changes to the settings)

 

But, as said Stefan, I think that I could improve the receiving by the addition of a preamplifier.

(at present the noise is low, too low... I think)

I hope to finish this preamplifier in a few days.

 

Many thanks for your transmissions (vy useful for me) !

 

Best 73 to all

John / F6HCC

 

 

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

From: Markus Vester

To: rsgb_lf_group@blacksheep.org

Sent: Monday, April 14, 2014 11:38 AM

Subject: Re: LF: 136 kHz TA

Hi John,

 

thanks for the screenshots!

 

I'm amazed that you can receive with an indoor loop. When I compared a loop outdoors vs in the room, there was little loss of magnetic fieldstrength, maybe one or two dB. But a lot of noise from devices in the vicinity: laptops, router, DECT telephone, power supplies, lights - it almost looked like anything that contains a transistor is noisy on LF ;-)

73, Markus

 

-----Ursprüngliche Mitteilung-----
Von: f6hcc 56 <f6hcc56@free.fr>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Mo, 14 Apr 2014 8:34 am
Betreff: Re: LF: 136 kHz TA

Hi All,

 

Received last night DF2JP, DF6NM, DK7FC

 

73, John / F6HCC