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Cluster Activity

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

Solar data:
SFI
2
A-Index
2
K-Index
29
Exp.K
qui
Sunspots
act
Activity
no
GMF
Aurora?
M0DTS

My Weather

ArrayDate:28/11/21 Time:12:51
Temp:2C
Wind Speed:7.5mph
Wind Dir:315deg
Pressure:1005.34mB
Humidity:86%
Dew Point:-0.8C
UKHASnet

VLF Tests so far:

06/2011 - First interested in VLF Comms, detected DK7FC test with Kite antenna on 8.97KHz - Found a Screengrab here!
2011 - some earth mde tests using 17m spaced electrodes, 1w power, dx ~1km.
2020 - Various Earth Mode Tests upto 4km with ~20W power - 40m spaced electrodes
14/8/2021 - 12:20-15:05UTC ~30W to electrodes 40m apart - 8270.0117
14/8/2021 - 15:35-18:50UTC ~40W to electrodes 40m apart - 8270.0117
15/8/2021 - 07:30-10:30UTC ~80W to electrodes 40m apart - 8270.0117 - 1st 'Dx' result to Todmorden, 100km!: Grabber Snapshot
20/8/2021 - Installed a new Earth spike to the east, again 40m distance.
20/8/2021 - 17:30-19:45 - ~100W to E/W 40m spacing 8270.0111
21/8/2021 - 09:45-11:45 - ~100W to NE/SW 60m spacing 8270.0111 - Better as expected: Grabber Snapshot
22/8/2021 - 09:00-12:00 - ~100W to E/W 40m spacing 8270.0111 - Grabber Snapshot

8/2021 - DL3JMM carrier received on both 8270 and 5170Hz - DL3JMM Carrier
28/29/30 /8/2021 - Various tests not logged.
5/9/2021 - GPS Referenced 10MHz oscillator as Tx source now in use, freq=8270.011750. New Matching transformer in use using N30 core.
7/9/2021 - 08:00-11:00 - ~200w to E/W earth loop, visible at Todmorden but weak - No reception at G4FVP 17km away.
8/9/2021 - 08:00-11:00 - ~250w to E/W earth loop - Received by G4FVP 17km to the west of me for the first time!! - Narrow filter used on M0BMU Loop Preamp, Signal is ~8dB/700uHz
9/9/2021 - 08:30-11:30 - ~250w to E/W earth loop - Received by G4FVP. M0BMU preamp in wide band setting has no signal detected but signal is there again with narrow filter selected.
10/9/2021 - 08:30-10:30 - ~250w to E/W earth loop
10/9/2021 - 08:30-10:30 - ~250w to NE/SW earth loop - Same strength at G4FVP as E/W, but NE/SW is longer.
11/9/2021 - 08:00-11:00 - ~250w to NE/SW earth loop - Much weaker at Todmorden (maybe 10dB less!) - Heavy rain overnight before this transmission. Actual problem was that i was using the E/W loop rather than N/S!
02,03,04/10/2021 - Multiple Carrier tests to G4FVP using his 1m square loop and M0BMU preamp

G4FVP rx M0DTS 8270.011749


09/10/2021 - 09:00 - 1st EbNaut Transmission, 20sec Symbols, 3chars, 8k19A - Received at Todmorden without any problem = Eb/N0 13.3
15/10/2021 - 09:05 - EbNaut Tx, 8270.011749, 8sec Symbols, 3chars, 8k19A - 'VLF' message received at G4FVP 17km away Eb/N0=-0.5dB, Nice!Screenshot
16/10/2021 - 09:00 - EbNaut Tx, 8270.011749, 30sec Symbols, 3chars, 8k19A - 'DTS' message received at G4FVP 17km away Eb/N0=7dB
17/10/2021 - 09:00 - EbNaut Tx, 8270.011749, 30sec Symbols, 3chars, 8k19A - 'DTS' message












Last page added:25/03/00 18:32
M0DTS.co.uk