Here is a very nice version of the spectrum analyser, built by Gabriel Cañamero LU3AXE in Rio Gallegos, Agentina. Gabriel had some difficulties sourcing the 3-section 145MHz Helical Resonator Filter locally, and I acted as an intermediary to order the filter and some other components in the UK, and send them by Airmail to Gabriel. All was well and only 2 months after the components reached him, I received back these fine photos showing his construction!