← Japan network

4HF (Raft)

Company connections · JS2SA · U.S.: 3DB Communication / WI2XXG

Raft transmits from Cosmo Classic Club East, with a five-element Yagi above McKay’s microwave equipment. Its Japanese licence names Chicago, London and Singapore; the ITU records give receive locations for Chicago and London.

Cosmo East · JS2SA

35.111472, 139.955582 ↗
Raft’s five-element HF Yagi above McKay’s two microwave dishes: left toward Maruyama CLS, right toward Kanozan.
Raft’s five-element HF Yagi above McKay’s two microwave dishes: left toward Maruyama CLS, right toward Kanozan. Photo: 27 May 2023 Ryota ↗ · English

One lattice tower, one SteppIR HFT540C Yagi. McKay later installed the same five-element antenna model at Kanozan.

McKay carries the backhaul

The tower’s only two microwave dishes belong to JOSADA/McKay and face Kanozan and Maruyama CLS. 4HF has no fixed-microwave or E-band licences in Ryota’s table. Together, this indicates that McKay transports Raft’s HF traffic.

Cosmo East ↔ Kanozan ↔ Marusada Ariake ↔ Shin-Toyosu Cube
The other dish connects south to Maruyama CLS.

Licences and Tokyo connections ↗ · English · McKay network

Raft’s SteppIR HFT540C viewed from below, with its five elements and McKay’s dishes immediately beneath.
Raft’s SteppIR HFT540C viewed from below, with its five elements and McKay’s dishes immediately beneath. Photo: 27 May 2023 Ryota ↗ · English
Equipment cabin, outdoor cooling units and cable runs at the base of the shared tower.
Equipment cabin, outdoor cooling units and cable runs at the base of the shared tower. Photo: 27 May 2023 Ryota ↗ · English

The Yagi and both dishes were already present on 27 May 2023, before the 7 June JS2SA licence date. The January 2025 revisit shows the same main arrangement.

May 2023 visit ↗ · English · January 2025 revisit ↗ · English

Overseas receivers

Chicago area · Maple Park, Illinois

3DB Communication / WI2XXG. The FCC location is 77 m from the ITU point.

ITU: 41.84278, −88.53861 ↗

London area

The second receive location declared by 4HF.

ITU: 51.57028, −0.61333 ↗

Singapore

Named in the Japanese licence, but absent from the selected ITU routes. We have no receiver coordinate for it.

Chicago and London first appeared in BR IFIC on 21 January 2025. The 6 January 2026 modification retained both endpoints.

Japanese licence comparison ↗ · English · ITU chronology · FCC sites