Article about transmitter modifications that includes links on schematics, plus data on component values and circuit details.

Information contents about audio modifications for the Eico 730 modulator.

Source of equipment modification facts and details on vintage radio products.

Information page about FT-101E series audio modifications that includes details on specifications.

Features modification details, schematic diagrams, and facts on improving the typical AA5 tube receiver.

Presents collection of photos on recent projects. Also offers kits and repair tips for radios, antennas and amplifiers.

Audio conversion for Johnson Viking I and II transmitters, with schematic diagram presentation.

Features AA5 radio modification details, historical information, photos, and schematic diagram presentation.