Roger G3XBM's (Mainly) Amateur Radio Blog

My 500uW (0.5mW) 10m WSPR has already been spotted multiple times this morning by EA8BFK (2880km). Perhaps this is not too surprising with ...

 All day, I was trying with 500uW (0.5mW) on 10m WSPR. No spots.

 Yet again I am on 10m WSPR with 500uW (0.5mW).  UPDATE 1431z:   No spots. At the moment, I get spotted on this tiny power a few times a week.

It seems to me that, when conditions are good, very  little power is needed to be spotted on WSPR. I tried 10m WSPR with 500uW and was spott...

Unless things dramatically change today, today will probably be my last day testing at QRPP on 10m WSPR. I shall try again in the Es season...

 Another day has passed and not a single spot obtained at 500uW. Unless things dramatically change  tomorrow, I propose to stop these tests...

For several weeks I have had spots of my QRPP 10m WSPR most days. Interestingly, there have been no spots of me this week. It looks as if co...

My 500uW (0.5mW) beacon is running and already 2 spots from EA8BFK (2880km). At these powers, my mind is "blown away".  This is j...

Many have wondered just how little do you need to communicate on HF?  Well, running really simple rigs is a compromise often with the receiv...

A reminder from Oleg has appeared in my inbox: "Dear Space Friends, tonight (October 4) at 00 UTC Sputnik QRPp Activity Days begin. ...

One thing the last few days of 5mW WSPR beaconing has taught me is others must be using better antennas than me. At 5mW I am really strugg...

With considerable difficulty (because of my stroke) I made a 20dB attenuator to reduce my 500mW down to just 5mW. This attenuator is right a...

Just for fun I'm having a go at QRPp WSPR on 40m. The set-up is the FT817 on 500mW going directly into a 26dB attenuator that feeds the...

This afternoon I exchanged WSPR reports with RI1ANF in the South Shetland Is in Antarctica on 10m. This now means I've had reports this...

Bert PA1B has an excellent website describing his experiments with very low power on HF. Using his FT817 with various simple attenuators...

Last night G6ALB and I did a test on 2m to see how little power was needed to communicate between the two of us. Andrew is 3km from me. We...

My QRSS30 137.7682kHz beacon is on until 0800z Tuesday morning sending XBM in QRSS30 with the full call at 10wpm periodically for full ID. ...

Today I reduced the power from my 40m WSPR beacon TX from 10mW down to just 1mW. The FT817 is run at minimum power setting (1W) then via a 2...

Whilst looking at the links on PC4T's blog I noticed Bert PA1B 's excellent website all about QRPp operating with lots of tips on h...

Chris G3XIZ has just sent me an updated list of his beacon reports and 2-way QSOs with his 15mW FETer transceiver. His best 2-way DX is no...