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

Scanned articles covering the early developments in Single-Side-Band (SSB) transmission. Unless otherwise noted, these scans were done by John Atwood. Articles marked "*" were extracted from americanradiohistory.com scans. Listed chronologically.

Hartley 1923 Relations of Carrier and Side-Bands in Radio Transmission - An article by Hartley of AT&T in the Bell System Technical Journal (Vol. 2, No. 2, April 1923) on the mathematical basis of sidebands in radio communications. This article also appeared in the Feb. 1923 issue of the Proceedings of the IRE.

Carson 1923 Signal-to-Static Interference Ratio in Radio Telephony * - A short article in the Proceedings of the IRE (Vol. 11, No. 3, June 1923) by Carson of AT&T on the signal to noise improvement of SSB vs DSB over and above the bandwidth reduction.

Heising 1924 Production of Single-Sideband for Trans-Atlantic Radio Telephony * - Article from the Proceedings of the IRE on the use of SSB in the first trans-Atlantic telephone links by AT&T with the help of RCA. Long-wavelengths (low frequencies) were used. SSB had been previously been used in carrier telephony to expand the number of voice channels that could be sent over open-wire toll lines. Until the first trans-Atlantic telephone cable (TAT-1) in 1956, all trans-Atlantic calls went over SSB radio.

Reeves 1931 The Single Side-Band System Applied to Short Wavelengths * - IT&T develops an SSB telephone system using a pilot frequency to synchonize the receiver with the transmitter. This was the first system to use short waves for trans-atlantic service. Tests were run from Madrid to Paris and Buenos Aires to Madrid on 15 meters.

Honnell 1945 Single-Sideband Generator * - An SSB generator for an 8 Kc power line voice and telemetry channel. Not a normal voice system, but the earliest example I've found for generating SSB by the phasing system.

Dome 1946 Wideband Phase Shift Networks * - Dome's original article from Electronics on designing constant phase-shift networks, crucial for the implementation of phasing SSB systems.

Goodman 1948 What is Single-Sideband Telephony? - A brief overview of SSB. QST finally gets serious about covering SSB, mainly motivated by reducing crowding on the phone bands.

Villard Jr 1948 Single-Sideband Operating Tests - Instructions on how to receive SSB and then descriptions of the first SSB QSOs from the Stanford University campus.

Nichols 1948 A Single-Sideband Transmitter for Amateur Operation - A rather elaborate SSB transmitter using the filter method. Really low IF: 9 to 11.6 KHz.

Norgaard 1948 What About SSB - Good overview of the implementation and benefits of SSB. Note that QST is still calling SSB "s.s.s.c" - Single Sideband Supressed Carrier.

Norgaard 1948 A New Approach to SSB - Norgaard, from General Electric, introduces the "Phasing" method of generating SSB. Quite a few early SSB transmitters used phasing, but eventually the filter method won.

Villard Jr & Thompson 1948 A Detector for SSB Reception - Using the phasing method for receiving SSB signals. Converters using this technique also work well for CW and AM on older receivers. All modern SDRs (Software-Defined Receivers) and mobile phones use this technique.

Dawley 1948 An SSSC Transmitting Adapter - A complete SSB transmitter using the phasing technique. Four 6L6s as a pair of balanced modulators put out about 25 watts.

Rosentreter 1948 Single-Signal Single-Sideband Adaptor * - An external SSB receiving adaptor using the phasing technique. Includes a locked oscillator for exalted-carrier reception of AM. This unit is also described in GE's Sideband Handbook.

Villard Jr 1948 A High-Level Single-Sideband Transmitter * - The phasing system as applied to high-level transmitting tubes.

Polkinghorn 1948 Commercial Single Sideband Radiotelephone Systems * - Now that SSB is beginning to see commercial and amateur use, Bell Labs (AT&T) puts out a good article on the history of SSB, centered on AT&T's developments. Sorry for the the poor scan quality, but this is the best I could do with the AmericanRadioHistory.com source.

Goodman 1949 The Basic Phone Exciter - A phasing-type exciter designed to put out single sideband (SSB), double sideband (DSB), or phasing modulation (PM).

Luck 1949 Properties of Some Wide-Band Phase-Splitting Networks - Elaborates on Dome's analysis of phase-splitting networks, essential to the phasing method of SSB. See Dome 1946 above.

Reque 1949 Linear RF Amplifiers - Reque, of General Electric, revives the idea of power linear amplifiers, essential for SSB work.

Berry 1949 A Filter Design for the SSB Transmitter - An exciter using the filter method. The filter is hand-made using toroids, with an IF of 17 to 20 KHz.

van der Wyck 1949 Modern SSB Equipment of the Netherlands Postals Telephone and Telegraph * - A detailed description of the improved SSB overseas radio system used by the Netherlands PTT.

Darlington 1950 Realization of a Constant Phase Difference - A paper from the Bell System Technical Journal on how to design constant-phase-difference networks, such as used in phasing SSB systems. Quite theoretical.

Saraga 1950 The Design of Wide-Band Phase Splitting Networks * - A higher-level analytical look at phase-splitting circuits than previous papers, including the use of Taylor and Tchebycheff (Chebyshev) approximations.

Bond Luck 1951 Discussion on Properties of Some Wide-Band Phase-Splitting Networks * - A slightly different analysis of Luck's phase-splitting paper. See Luck 1949 above.

Villard Jr 1952 Cascade Connection of 90-Degree Phase-Shift Networks * - Cascading phase-shift networks improves phase-shifting accuracy.

Kahn 1952 SSB Transmission by Envelope Elimination and Restoration * - Eliminating the need for a linear amplifier by amplitude demodulating an SSB signal to conventionally AM modulate a class-C amplifier. This seems dubious, since an SSB signal is required and linear amplifiers are not hard to implement.