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This letter describes a recent HF/VHF radio signal measurement campaign carried out in a small urban reservation of the Atlantic Rainforest at Rio de Janeiro, Brazil. Motivation came from the lack of detailed reports on this type of work, considering the Brazilian forest scenarios. The collected data are presented in the form of path loss versus distance and frequency and are compared to Tamir's model. Good adherence was observed between measurements and calculated values from the reference model, despite the relatively short distances, with mean errors no greater than 3.0 dB and standard deviations less than 4.3 dB.