Mike Dennison, G3XDV
LF Amateur Radio

Spectrogram Plots

[My Station] [Latest Activity - My Blog] [Calls Heard/Worked] [GW3XDV/P] [Links]
[Stretching the limits - extremely slow CW] [Spectrogram Plots]

Click on the callsigns for examples of the displays from the
DSP programs used on the 136kHz band [more on this technique].

Call Date
My signals received by W1VD 23/24 January 2006
QSO with S52AB 3 December 2005
DL3ZID (comparison between DFCW3, QRSS3 and QRSS10 on a marginal signal) 5 March 2005
HF75PZK 22 January 2005
Z32AV 15 January 2005
QSO with RU6LA 15 January 2005
DF0WD's seaonal Hell message 26 December 2004
HA6PC 26 December 2004
DF0WD 'Hell' + OK2BVG DFCW 5 December 2004
VO1NA 05 January 2004
QSO with S57A 23 February 2003
G-EA QSO 4 January 2003

QSO with MI0AYZ on 73kHz

10 December 2002
RU6LA 7-9 November 2002
Hellschreiber from PA0SE 23 June 2002
G3XDV received by VE1ZJ
(lowest power Atlantic crossing)
12-15 March 2001
QSO with CT1DRP 24 February 2001
VA3LK received by me 28 January 2001
VA3LK received by M0BMU 20 January 2001
OM2TW 20 January 2001
VE1ZZ 12/13 January 2001
VE1ZZ 5 January 2001
QSO with OK1FIG.
Also OK1FIG, PA2NJN and ON4ZK on the same plot
27 November 1999
QSO with DF8ZR 27 November 1999
GD0MRF and G3LDO on 73kHz 21 November 1999
QSO with IK5ZPV
Also shows DJ5AO and PA2NJN
24 October 1999
DJ2LF 2 October 1999
OZ1KMR working OK1FIG
Possibly the first reception of OK in G
12 September 1999
HBG 75kHz During Total Eclipse 11 August 1999
G0AKN tests using sea-earth antenna 8 August 1999
DK8KW 13 June 1999 
IK5ZPV 7 March 1999
IK1ODO 19 November 1998
LX1PD 21 June 1998
DA0LF (includes an audio clip) 21 June 1998
ON7YD-G3XDV First ON-G QSO 22 May 1998
ON7YD - First ON heard in G 17 May 1998
G2AJV 8 March 1998 
Last updated 28 March 2004