Dear Mal,

with all due respect, I very much disagree here.

Whenever I see a clear trace appear at the right time and within a milliHz 
of a confirmed and correctly calibrated frequency, I have hardly a doubt 
about the validity of the reception. Even more so if the transmission can be 
verified by comparison to a calibrated grabber in another location.

It seems that the G3KEV antenna does have excellent sensitivity at VLF. It 
would be fantastic if you could augment that with a stable, properly 
calibrated, and narrowband reception system. SpecLab has made that so easy 
now - throw out the wildly drifting "receiver", connect your antenna 
directly to the soundcard instead, lock to one of your MSK neighbours (GBZ 
or GQD), and your in the game.

Best regards,
Markus (DF6NM)


From: mal hamilton
Sent: Friday, March 11, 2011 5:57 PM
To: rsgb
Subject: LF: VLF traces


I can see a couple of vy weak traces around 8970 but this is no guarantee 
who it might be because there is no ID. Frequency alone is not a VALID 
report- it could be anything.
G3KEV