Message-ID: <C40C1184188E4E9CB4B9835999771D02@AGB>
From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <ocp54c+m7ls3@YahooGroups.com>, <58F09A90.1769.7011B2@roelof.ndb.demon.nl>, <5E4B3FA1CBBB46C0A8F875AD0B19DB9A@AGB> <58F0E4E0.21322.D0465@roelof.ndb.demon.nl>
In-Reply-To: <58F0E4E0.21322.D0465@roelof.ndb.demon.nl>
Date: Fri, 14 Apr 2017 17:47:57 +0100
MIME-Version: 1.0
Importance: Normal
Subject: Re: LF: Re: [rsgb_lf_group] VO1NA   477  OP8 :Start 2300 finish 0900 50 watts to  monopole.
Content-Type: text/plain;
	format=flowed;
	charset="iso-8859-1";
	reply-type=original
Content-Transfer-Encoding: 7bit
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
Status: O

No problem  Roelof

The Opera 'gang  seem to  always  up for a  importune   sing along ..)

Joe was running op32  , Actually  quite handy , If you  still  have the 
'tape ,  just  set opera to  136  and re-run the  recording ,  you should 
see spots down to   -40 dB s/n  after the first decode ,  the  dynamic  list 
will  update [ if your pc is  web linked] then low limit  round -45 dB , if 
all  works , that's probably the  first op32 over 477k  at  range ...% fade 
should  track the  qsb in this  case ...

RTL dongles , Yes I think those  stared  with a  bad-press ,  but  in 
reality , work  very well ,  in direct sample,  there  is a loss of 
sensitivity , but your  entering  the  rx  chain  in the  middle,  it 
should  be  looking  at the  out put of the  internal  down-convertor ..

What happens on 136  , with the 530 Low pass ,  are you  able to monitor 136 
op32 ? and  477 op8 ?

73-Graham

--------------------------------------------------
From: "Roelof Bakker" <roelof@ndb.demon.nl>
Sent: Friday, April 14, 2017 4:04 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: Re: [rsgb_lf_group] VO1NA   477  OP8 :Start 2300 finish 
0900 50 watts to  monopole.

> Hello Graham,
>
> Thanks for the encouragement.
>
> I will add Opera 477 to my listening set up.
> This can be done by either using a fourth software receiver in
> SDRConsole running on an Afedri SDR. However, lately I have been
> playing on NAVTEX 518 kHz with a 20 Euro RTL-SDR V3. This has been a
> revelation and it is about on par with the Afedri!
>
> It is a bit deaf at LF, hence I am using a tuneable pre-amplifier
> preceded by a 530 kHz low pass filter. This way it becomes a decent
> receiver.
>
> Just for fun, I will set it up for Opera 477 kHz and let it run
> overnight.
>
> 73,
> Roelof, pa0rdt
> 

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus