G0MJI - 4m Wspr Notes (2010-2014)

Hello, thank you for finding your way here.

Wspr on 4m is a little different from Wspr on other frequencies. This is due to a number of factors, not least the scarcity of affordable multimode 4m transceivers at this time. It is a little less 'Plug 'n' Play' than on the other bands - it takes effort and as such it may not be for everyone. As ever rumours abound that a new 4m Multimode is on its way (Okay, the Icom 7100 has arrived at last and is most welcome as is the Icom 7300.) In the meantime 4m Wspr remains an interesting challenge. Tougher than HF but possible if you are patient and wish to learn, it certainly is not the 'wrong trousers' as it has been portrayed in some circles.

Here are a few things I have learned whilst trying to put out a Wspr signal on 70mhz.

I hope to spot you soon...

Update 2016. I am the happy owner of an IC7300. It has 4m. It also has an issue with 4m Wspr - or at least mine does. I have documented this here

1) Why 4m Wspr? 5) Modifications To The Spectrum 4m Transverter For Use On Wspr
2) What is possible? 6) What Is A Weak Signal?
3) Frequency issues 7) Using The Spectrum Transverter With A Flex 1500 - Yes You Can!
4) Antenna 8) Double Turnstile Experiment
9) G0MJI Wspr Screen Live - Experimental
10) IC7300 and Wspr

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