Complex sentence: Neither of these systems had the accuracy needed to directly lay their associated guns, however, and the US delegates then mentioned the Navy's work on a 10 cm wavelength radar, with the required resolution, but the klystron tube had very low power.
Split into simpler sentences: Neither of these systems had the accuracy needed to directly lay their associated guns, however. The US delegates then mentioned the Navy's work on a 10 cm wavelength radar, which would have the required resolution, but their klystron tube had very low power.