Hi,
An update. I have completed my 21 Mhz Sun/Jupiter radio telescope (I will upload image once I have downsized it). Unfortunately I am not sure as yet if it works.
This has come about for two reasons. The first is that the software defined radio dongle's frequency range doesn't quite go down low enough to listen at the required frequency. I plan to buy a frequency changer which will allow it to hear at these frequencies. In the meantime, I purchased a cheap shortwave radio from Jaycar and tested the antenna using that. Pointing the antenna at the Sun didn't produce anything exciting.
This brings me to the second reason. I am not sure if the Sun is active enough for that set-up to detect anything. As for Jupiter, it turns out that you need to know when to listen. Apparently, Io has to be in a particular location in it's orbit to maximise your chance of hearing anything. Interesting article about that here:
http://www.reeve.com/Documents/Radio...20Complete.pdf
So patience is going to be required.
Regards,
Paul Floyd.
www.nightskyonline.info