Stargazing What are the Limits of Wavelength Detection in Modern Telescopes?

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Modern telescopes, such as the LOFAR, can detect wavelengths as long as 7 meters, which corresponds to a frequency of about 10 MHz. This capability raises questions about the accuracy of reported sensitivities and the significance of such long wavelengths in astronomical research. While long wavelengths have not been a primary focus in astronomy, there are other instruments, like the Cambridge pulsar array, that also explore this range. The interest in high-energy wavelengths often overshadows the study of lower frequencies. Overall, the detection of long wavelengths remains an area with potential for further exploration and understanding.
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What are the longest wavelengths that todays telescopes can detect for?
 
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Probably something like lofar (10MHz = 30m)
 
I looked up the Lofar telescope on the web and in a slashdot comment;

http://science.slashdot.org/story/1...cope-Array-Grabs-First-Pulsar-Images?from=rss

it says that it is sensitive to wavelengths as long as 7 metres. Is this a mistake?
I can see that 10Mhz relates to a 30m wavelength.

Are there other telescopes in astronomy that can detect long wavelengths?
 
Probably the 10MHz band isn't built yet. I don't know if it's a particularly important part or just the ultimate limit of the antenna.

Generally long wavelengths haven't been much of a focus, high energy is more sexy.
Probably the most famous is the cambridge (MRAO) pulsar array.
 

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