Raytheon Manufacturing Company
Tech's Filing Cabinet Miscellaneous General Electric RCA Tube Tech Semi Tech Audio Radio Components

Here are various documents from Raytheon. Some are internal documents and some are for the general public. Listed chronologically.

Raytheon 1928 Type BA Bulletin TS-5 - A 350mA full-wave gas rectifier that can supply both the A and B voltages for a receiver using 01-A tubes with the filaments wired in series. Not the most efficient, but eliminates the need for a 6 Volt storage battery. Also has data on the BH rectifier.

Raytheon 1928 Type BH Bulletin TS-6 - A 125 mA full-wave gas rectifier that can be used as a B-battery eliminator or to supply both the A and B voltages for a radio using series-connected 199 tubes. Includes a section on troubleshooting.

Raytheon 1937 Radio Receiving Tubes - A 1937 Receiving Tube Databook with lots of application information.

Raytheon 1938 Handbook of Amateur Tube Uses - Raytheon transmitting tube data plus extensive application information and circuits. Lots of information. 72 pages.

Raytheon Nelson 193- Noise in Vacuum Tubes and Associated Circuits - Bulletin 51 - No date but probably 1938-39. Sources of noise in RF amplifier and converter tubes. Has experiments to compare with theory. Note: this kind of analysis does not apply to audio amplification, where 1/f noise is usually dominant.

Raytheon 1940 Characteristic Data Chart - A listing of Receiving tubes, ballast tubes, and miniature lamps in chart form.

Raytheon Blackwell 1944 Pentode No 3 Grid Mutual Conductance Characterisitcs - A study of the transconductance from grid #3 to the plate of various RF pentodes: 78, 6S7G, 7B7, and 6SD7GT.

Raytheon Freedman 1944 Correlation of Weight & Diameter for Various Grid Winding Wires - An analysis of diameter (in inches) versus density (mg/200 mm) for eight different types of grid winding wire.

Raytheon Blackwell 1944 RF Pentode Rp and gm as Affected by Number 3 Grid Pitch - A study of the effect of varying the grid #3 pitch (turns per inch) on the mutual conductance and plate resistance of these RF pentodes: 78, 6SD7GT, 7A7, and 7B7.