RE: LF: G7NKS - Double Side Band: wspr?

[M0FMT <m0fmt@yahoo.co.uk>]

Hi Jim

 

OK too bad you can't resolve it with your existing Sound Card.

 

When considering a USB SC think about SDR (the future of Ham Radio). M-Audio is considered a good card but see M0KGK's site for comparison with the Creative Labs Sound Blaster Live a cost effective solution (these are still available although production I believe has now ceased).

  http://www.m0kgk.co.uk/sdr/soundcards.php

 

Oh BTW double side band WSPR dosn't bother me in the least....hee.

 

Best of luck 73 petefmt

--- On Sun, 15/11/09, James Cowburn <james.cowburn@virgin.net> wrote:

From: James Cowburn <james.cowburn@virgin.net>
Subject: RE: LF: G7NKS - Double Side Band: wspr?
To: rsgb_lf_group@blacksheep.org
Date: Sunday, 15 November, 2009, 22:29

Dear LF

 

The double or treble reports on strong signals are due to a main hum problem on my system.  It only seems to appear on 500 and only on signals where I am strong e,g, MOBMU and MOFMT.  I’m working on some solutions and will also be getting a USB sound card to try and further isolate the sound from the mains.

 

Apologies to all for the multiple decodes.  I have tried turning the power down on the TX to get the extra decodes at M0BMU and MOFMT below -30dB so they are not picked up but to no avail.  Pete’s too close and Jim M’s antenna is too good!

 

USB sound card has been advised by several others so that’s my next port of call

 

 

 

With best regards

 

 

Jim

 

 

Dr. James Cowburn

 

---

From: owner- rsgb_lf_group@blacksheep.org [mailto:owner- rsgb_lf_group@blacksheep.org ] On Behalf Of M0FMT
Sent: 15 November 2009 21:59
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: G7NKS - Double Side Band: wspr?

 

Hi Jim and LF group

 

Please observe the reports I am getting from Jim G7NKS WSPR transmissions :-

 

First a weak one and then a strong one then a weak one (see below) does it mean there's a sprog / modulation on Jim's transmission off set by approximately +/-50c/s? I will try to get a time domain display of it when I have time, it may provide a clue. Is it my RX?

 

2009-11-15 21:26	G7NKS	0.503904	-26	-1	IO92ub	0.02	M0FMT	IO91ux	9	180
2009-11-15 21:26	G7NKS	0.503853	+2	-1	IO92ub	0.02	M0FMT	IO91ux	9	180
2009-11-15 21:26	G7NKS	0.503803	-25	-1	IO92ub	0.02	M0FMT	IO91ux	9	180

 

 

 

 

 

Don't think it's my old HB drifty DC RX that accounts for it because all other reports are OK as far as I have seen to date but am open to comment.

 

  73 petefmt