Paolo brought an international perspective and a scholar’s thoroughness to the R-390 community with “La Famiglia 390” — a comprehensive reference work that treated the entire Collins military receiver family as a unified subject. Where most community documentation focused exclusively on the R-390A, Paolo’s work encompassed the R-389, R-390, R-390A, R-391, and R-392 — the full constellation of receivers that shared Collins’ design heritage and the 390 designation.

The Family Approach

The title itself — “La Famiglia 390,” the family of 390 — reflected Paolo’s conceptual approach. Rather than treating each receiver as an isolated subject, he presented them as members of a related family, each designed for a specific role within the military communications infrastructure but sharing common engineering DNA. This perspective was unusual in a community where the R-390A dominated discussion to the near-exclusion of its siblings.

The R-389, covering the LF range; the original R-390 with its hand-wound LC filters; the simplified and more producible R-390A; the R-391, an auto-tuning variant; and the compact R-392 field receiver — each received detailed treatment. Paolo’s comparative block diagrams allowed readers to see at a glance how Collins’ engineers adapted the core design concept across different frequency ranges, form factors, and operational requirements.

Technical Depth

La Famiglia 390 included comparative tube lists showing how each receiver in the family employed vacuum tubes for similar functions but with different specific types suited to each design’s requirements. The block diagrams traced signal paths through each receiver, making visible the architectural similarities and differences that connected the family members. For technically minded readers, this comparative approach revealed design decisions that were invisible when studying any single receiver in isolation.

The work also documented variant differences within individual receiver types — the production changes, contract-specific modifications, and engineering revisions that distinguished early production from late, one manufacturer’s output from another’s. This level of detail served both the technical reader seeking to understand the engineering and the collector seeking to identify and evaluate specific examples.

The Bibliography

Perhaps the most immediately useful section for many readers was Paolo’s approximately ten-page English-language bibliography, which compiled references to the key technical documents, modification guides, and community resources available for the R-390 family. Works by George Kleronomos, Chuck Rippel, Dallas Lankford, and many others were catalogued and described, creating a roadmap to the community’s scattered technical literature.

For newcomers to the hobby especially, this bibliography served as an essential starting point — a curated guide to the most important resources, assembled by someone who had read and evaluated them all. The bibliography’s scope, covering both the well-known references and more obscure technical papers, reflected the depth of Paolo’s own research into the subject.

An International Voice

Paolo’s contribution from Italy underscored the international reach of the R-390 collecting community. While the receivers were designed and manufactured in the United States for the American military, their reputation for exceptional performance ensured a worldwide following. European collectors faced additional challenges — higher acquisition costs due to shipping, voltage differences requiring power supply modifications, and greater difficulty obtaining spare parts — but the R-390 family’s engineering excellence transcended national boundaries.

La Famiglia 390 demonstrated that some of the most thoughtful analysis of these American military receivers was being produced thousands of miles from where they were built, by someone whose appreciation for Collins’ engineering was undimmed by distance.