WSPRnet.org

I obtained the go ahead to run an Unattended Solar Powered Test on 10.140073 MHz during the summer months.

My Multimode MEPT recently completed 62 days of trouble free unattended operation. During this time daily spots were posted proving its constant signal. QRSS Knights posted captures of the visual modes and it appeared on the Grabber network. In addition I personally viewed the signal from up to 1000Km away.

This proves the stability of what I shall call the SM6LKM method of setting voltage levels for the individual tones.

On the 16th of June I noticed some instability on my MSF time locking system on my MEPT on 10.140073MHz. I thought I sorted it but yesterday there were no Spots. I was busy and only popped in the shack to change bands etc.
A further check today revealed that whilst there was no instability there was no sync either and hence the WSPR was off on timing.

Apologies for this. It is now back on test with a slight modification, please check for Spots of the WSPR.
Reports/Captures are welcome of the Graphical modes also.

My Multimode MEPT on 10.140073MHz has had a new visitor tonight.
Being in the Graphical Mode Sector (10.140000 to 10.140100MHz) it normally, unless someone miss tunes in error, literally does require a visit. Simply by setting the Dial frequency to 10.1386 and the Frequency in the 10.140100 to 10.140200MHz range.
The MEPT provides a guaranteed drift fee WSPR signal every 6 minutes starting on the Hour. After XX:18 the sequence then repeats at XX:20 and XX:26 etc up to the hour.
Power output is a genuine 40mW to a 10MHz 1/2 Wave Dipole.

My new 8 Unit Multimode MEPT is on test on 10.140073 MHz. Running WSPR only in every 2 minute slot in order to check timing drift free running.
The complete TX uses 4 IC's. It consumes 53mA at 12Volts, Solar Powered, for 40mW RF output. Presently the Antenna is a low sloping 1/2 Wave Dipole for 10MHz.

No need for a Power Hungry Computer and Transceiver or Attenuators to throw away the power you just generated :-)

My Multimode + WSPR MEPT is back on 10.140073MHz from approx 15.00 GMT today 12 May 2008.

Further developments are afoot these will affect the 'other' visual modes.

The Multimode + WSPR MEPT on 10.140073 will be off for several days from later today 03.May.2008. Being a Manned Beacon, under the licence conditions I cannot leave my Son or XYL in charge.

The Drift value given in WSPR can be useful yet needs some understanding to interpret. Until recently I personally paid only passing regard to the figure.

An interesting thing is that the only station that does not see drifting banana like signals on the waterfall is the person producing them.

Following recent discussions on Knights QRSS. I think we can come to a few conclusions. The decoded value is the result of drift from the TX station and the Rx station. If the two stations drift in opposite directions the figure will cancel and severe drift could be masked.

This seems a handy place to Notify and Remind everyone about my 5 unit Multimode Visual + WSPR MEPT.

Reports to the WSPR Spots or Screen Captures are alway welcome, whilst it does involve a shift of Dial Frequency to 10.1386 in order to receive the Beacon, during this time stations can still RX and TX in the 10.140100 to 10.140200 Range.

MEPT Frequency 10.140073MHz.
Power 40mW.
Antenna 40m 1/2 Wave Doublet + ATU - OR 6m Vertical + ATU - OR 0.9m Hairspray Vertical. (Variable)