Wireless & Radio

The live multi-page gallery archive under /caloia, covering spark-era apparatus, Marconi instruments, and related wireless material.

Hughes' induction balance, microphone work, and his place in the prehistory of wireless communication.

Receiver no. 4681, with detailed photographs, component views, and service history tied to the SS Spokane and SS Cordova.

A full instrument dossier for serial no. 14880, covering the operating principle, developed forms, shipboard service, spring-motor repair, Butterworth provenance, Kreuzer appraisal, and the SS City of Salisbury research lead.

A close look at the M.P.4 wavemeter, its markings, internals, and open questions about period use.

The early V2 set before routine BBC-era regeneration fitments, with photographs and period documentation.

An eight-section high-voltage condenser battery, dated Oct. 1, 1918, with Signal Corps markings and a reported 0.0072 uF, 12,000 V.AC aggregate rating.

The wireless recordings now appear as a visible menu feature instead of hidden raw docroot paths. Part 1 is approximately 5.7 GB and Part 2 approximately 4.9 GB.

Direct stream links: Part 1, Part 2. Native playback depends on local HEVC support.