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20/08/99 VLF Receiver
25/09/33 GB3KM Website
05/01/22 IR Beacon
17/10/21 VLF Log
20/08/21 VLF Rx Info
17/08/21 VLF Tx Info
06/01/20 NLOS Part6 - Tests 281219
06/01/20 NLOS Part5 - Tests 231219
06/01/20 NLOS Part4 - Tests 211219
24/12/19 NLOS Part3 - Tests 151219
24/12/19 NLOS Part2 - Rx
24/12/19 NLOS Part1 - Tx
24/12/19 NLOS
20/06/19 IC9700 Send Splitter
12/01/19 71MHz DATV Amplifier
25/07/18 77GHz Doppler Module - Part2
13/04/18 DSN Reception April 2018
22/03/18 DSN Reception March 2018
07/01/18 12:6 Audio Mixer - Testing
02/01/18 12:6 Audio Mixer
16/08/17 77GHz Doppler Module
14/08/17 DSG 13Z Lathe
02/07/17 134GHz Multiplier Block
21/05/17 Microsource YIG Synth
13/05/17 Transfer Relay 24v to 12v
13/02/17 Chirp Tx With Red Pitaya - 3
27/01/17 Chirp Tx With Red Pitaya - 2
23/12/16 Tropo Dec 2016
03/12/16 11km on 134GHz
11/11/16 Improved 134GHz Rx
04/11/16 GB3KM Waterfall Display
14/10/16 146MHz Digital Pre Distortion Tests
09/09/16 Boxing up the 134GHz Gear
09/09/16 Getting started on 134GHz
11/08/16 Gigawave 6cm ATV Tx
17/07/16 ADF4252 Elcom Code & 24GHz Beacon
29/06/16 Eshailsat Tx and Rx ideas
08/05/16 Symmetricom 10MHz GPSDO
20/04/16 RTLSDR Si5351A reference
22/03/16 Basic Verilog Code De0Nano
08/03/16 Chirp Tx with Red Pitaya - 1
07/02/16 3m Dish Refurb
07/02/16 Detecting a Pulsar at 1420MHz?
20/09/15 DSP#3 Weaver SSB Demod
15/09/15 DSP#2 Decimating FIR
15/09/15 DSP#1 IQ Mixer
15/09/15 DSP#0 Learning DSP!
06/09/15 146MHz RD70HVF1 Amp
26/07/15 Chirp Radar Links
03/04/15 6m Chirp Beacon Info
14/02/15 146MHz DATV 2-way 50km
20/01/15 146MHz DATV 2-way 28km
20/01/15 146MHz RD06+RD15 Amp
03/01/15 146MHz Amp Tests
01/01/15 146MHz DATV Tests
19/10/14 KM Logic Re-Design
05/10/14 Broadband-Hamnet
29/08/14 Live Geiger Counter
27/08/14 Material absorbtion tests
24/08/14 Geiger Counter Setup
24/08/14 Useful links Radioactivity
14/08/14 Pulsed Radar Tests
14/08/14 Chirp Radar Tests
21/07/14 GB3MAN 24GHz Reception2
26/06/14 GB3MAN 24GHz Reception
19/06/14 ATV Dx Gallery
16/06/14 Live Weather
28/05/14 CNC G-Code Simulator
20/05/14 Arduino -1-wire weather
01/01/14 117km Lightwave QSO!
27/12/13 F1EHN Tracker prog
16/12/13 DL0SHF EME on 10GHz
10/12/13 Simple FFT from rtlsdr in C
10/12/13 Simple Framebuffer Write in C
01/12/13 MMDS Converter on ATV
23/11/13 MK808/PVRUSB2/DigiLite Without Controller
17/11/13 MK808/PVRUSB2/DigiLite
05/11/13 DVB-S USB rx
19/10/13 Lightning but a bit too close!
15/10/13 Nice way of explaining IQ Signals
04/10/13 Building new kernel for MK808
29/09/13 3.4GHz Alford Slot
22/09/13 GB3KM streaming with ffmpeg & Gallery
12/09/13 Ubuntu Nvidea Screen res
06/09/13 Elcom Synths on 9GHz
05/09/13 LM2596 Negative supply mod
22/08/13 22-25GHz Amplifier
10/08/13 24GHz LNA box
01/08/13 Most Viewed
31/07/13 CNC stepper driver box
09/07/13 Ka band LNB on 24GHz?
14/06/13 24GHz Alcatel Tx/Rx Module
02/06/13 Chirp Sounders
02/06/13 Hydrogen Line 1420MHz
02/06/13 1st 8.4GHz Reception
02/06/13 8.4GHz Rx Equipment
02/06/13 IPTV
02/06/13 436MHz DATV Up-Converter
10/05/13 Portable Amplifier box ***
27/03/13 DigiLite
27/03/13 Analogue vs Digital
27/03/13 Weather Sat Images
27/03/13 Spectrian 180W Amp ***
27/03/13 Delayed muting ****
27/03/13 Realtek SDR dongle
25/03/13 Simple Horn
25/03/13 Planets
25/03/13 STARRS Comet
25/03/13 70cm QRM
25/03/13 Nokia Amplifier Info
25/03/13 EME in 2012
25/03/13 Current Activity
25/03/13 Activities
24/03/13 Activities
24/03/13 6m Chirp Beacon Idea
24/03/13 Activities
24/03/13 HF Activity
24/03/13 3.4GHz Airspan Board mods
24/03/13 ATV Equipment Links
24/03/13 13cm 200mW Comtech info
24/03/13 23cm ATV Filter
24/03/13 G6ALU Caption Generator
23/03/13 Intro
23/03/13 Digilite Tx Spectrum
23/03/13 10GHz EyalGal unit
31/01/13 Some photos
25/10/12 500W+ 1296MHZ Amp Project
10/09/12 ATV Contest 2012 ****
29/05/12 Tropo May 2012
17/09/11 ATV using LED Tx
11/09/11 ATV Contest 2011 ****
28/03/11 Archive3 - DATV Software
27/03/11 Archive2 - DATV Transmitter
27/03/11 Archive1 - DATV System info
23/10/10 ATV over the Pennines!
23/10/10 Tropo October 2010
09/09/10 ATV Contest 2010 ****
25/03/10 10GHz Narrowband
10/09/09 ATV Contest 2009 ****
23/03/09 10GHz ATV dx 115km
21/03/09 Repeater Contest 2009
25/08/08 EME in 2008
08/06/08 Summer Fun ATV 2008
25/03/08 Tropo Dx Log*************
25/10/07 EME in 2007
24/09/07 23cm Tx
09/09/07 ATV Contest 2007
22/12/06 Tropo Dec 2006
10/09/06 ATV Contest 2006
25/08/06 EME In 2006
23/07/06 Tropo July 2006
25/05/06 1.8M EME Dish Project
23/05/06 Tropo May 2006
24/02/06 23cm DG0VE Amplifier
23/02/06 Tropo Feb 2006
24/11/05 Tropo Nov 2005
10/09/05 ATV Contest 2005
25/08/05 13cm Amplifier
13/07/05 GB3YT (YV,YX)
26/02/05 First Reception of EME on 2M
25/06/04 23cm In the beginning
25/03/00 Useful links 23cm

Spots per uW band today:
UK spotter or spotted only.

23cm

13cm

3cm

Solar data:

SFI

185

A-Index

K-Index

Exp.K

Sunspots

113

Activity

eru

GMF

act

Aurora?

ArrayDate:02/12/24 Time:13:39
Temp:7.5C
Wind Speed:7.5mph
Wind Dir:0deg
Pressure:1010mB
Humidity:118%
Dew Point:11.1C

M0DTS VLF Rx in IO94IL 54.5N,1.29W - (DK7FC design) E-field Probe at 6m above ground

Below is a photo of the E-Field probe, it's built dead bug style on some pcb like the DK7FC Design, it's mounted on a fibreglass pole about 6m above the ground but only 3m above a metal storage container!

The probe is powered by battery/solar panel to keep it running 24/7, current draw only 32mA.

Audio feed back to the shack is through satellite coax just because it's cheap! an audio isolation transformer is used half way along the coax run to avoid noise pickup from the house.

The receive system is based around a raspberry pi with an Audio Injector Octo Sound card, the software is vlf-tools - http://abelian.org/

06/2011 - First interested in VLF Comms, detected DK7FC test with Kite antenna on 8.97KHz - Found a Screengrab

DK7FC 8970 Transmission

E-Field Probe

Rx_1

Rx_2

Rx_3

Rx_4

Last page added:25/03/00 18:32

M0DTS.co.uk

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