Federal Telephone and Radio (FTR), a division of IT&T put out a series of nomographs in 1946 to assist in radio and electronics design. The first file is a group of six nomographs for calculating the behavior of double- and triple-tuned bandpass circuits. The rest of the files are for single nomographs. The second page of each nomograph file is a brief description of the nomograph.
Double- and Triple-Tuned Bandpass Circuits - six nomographs
Characteristic Impedance of Balanced Two-Wire Line
Characteristic Impedance of Concentric Line (Large)
Characteristic Impedance of Concentric Line (Small)
Characteristic Impedance of Concentric Line with Solid Dielectric
Characteristic Impedance of Single Wire in Trough
Characteristic Impedance of Square Outer Conductor Line
Circular Waveguide Cutoff Frequencies
Deflection Sensitivity of CRT with Electromagnetic Deflection
Deflection Sensitvity of CRT with Electrostatic Deflection
Length of Transmission Line - based on electrical length in degrees and frequency
Modulation Percent from Oscillograms
Reduction in Gain Caused by Feedback
Sending End Impedance of Uniform Line
UHF Path & Optical Line-of-Sight Distance between two aircraft
UHF Path & Optical Line-of-Sight Distance-Range of Radio Waves
Wideband Amplifier Range Extension using the Series-Peaking Method