Edwin H. Armstrong
Tech's Filing Cabinet Miscellaneous General Electric RCA Tube Tech Semi Tech Audio Radio

Books and articles on radio/RF technology. See the GE and RCA sections for their radio coverage.


Microwave Associates 1962 Varactor Harmonic Generation - Using varactor (variable-capacitance) diodes as frequency multipliers up to thousands of Megacycles.

FTR - Data from FTR (Federal Telephone & Radio).

Hazeltine - R&D papers from Hazeltine Corp.

Articles - Includes special collections for Early SSB and Early FM.