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General Radio Company Advertisement
October 4, 1965 Electronics Magazine

October 4, 1965 Electronics

October 4, 1965 Electronics Cover - RF Cafe[Table of Contents]

Wax nostalgic about and learn from the history of early electronics. See articles from Electronics, published 1930 - 1988. All copyrights hereby acknowledged.

This advertisement for General Radio Company's Recording Wave Analyzer (1965 Electronics magazine) caught my eye due to the chain-driven interface between the upper Type 1900-A Wave Analyzer and lower Type 1521-B Graphic Level Recorder chassis. Maybe that can be considered an early form of the GPIB - General [Instruments] Physical Interface Bus. I wonder how many neckties, a rigidly-enforced item of professional dress code of the era, got caught in those exposed gears? ...or fingers for that matter? OSHA would condemn such a platform these days. It is not apparent from the photograph whether there is also an electrical interface. The quality of the printed chart output is phenomenally good for 1965 equipment - and in color, no less. I also found it interesting that a reference was made to "M. Fourier," as though maybe Fourier's first name began with an "M," but in fact his full name is Jean-Baptiste Joseph Fourier (French), so the "M." would be an abbreviated form of "Monsieur."

General Radio Company

M. Fourier would have liked this Recording Wave Analyzer

Harmonic components of a 1-kc square wave.

Analysis of a 1-ms pulse with a 20-cycle repetition rate.

Graphic plot of modulation noise on a 1-kc tone for two different types of magnetic tape. Note that one tape has 10dB less noise. The Recording Analyzer is ideal for this type of measurement since its 80-dB dynamic range permits uninterrupted recording over wide ranges.

• Three bandwidths let you choose the best selectivity for each measurement ... 3 c/s or 10 c/s for detailed measurements, 50 c/s for rapid analysis or for measurement of drifting signals. Bandwidth skirts are better than 80-dB down at ±25 c/s, ±80 c/s, and ±500 c/s for 3-, 10-, and 50-cycle bandwidths, respectively.

• Linear frequency scale from 20 c/s to 54 kc/s.

• Two outputs for recording, 100 kc/s with 80-dB dynamic range for inputs above 0.1 V, and 1-mA dc.

• 80-dB dynamic range for recording. You can make uninterrupted recordings ... no attenuator switching in the midst of measurements.

• High input impedance (1-MΩ) on all ranges.

• Voltage range is 30μV to 300V, full scale, in 15 ranges. Accuracy, ± (3 % of reading +2% of full scale) .

• As a "Tracking Generator," instrument is both a signal source (delivering 2V across 600Ω) and a detector tuned to each other exactly.

Type 1910-A Recording Wave Analyzer comes complete with Type 1900-A Wave Analyzer, Type 1521-B Graphic Level Recorder, and all accessories.

For point-by-point measurements where the recorder is not used, these additional wave analyzer features add versatility and convenience

• Easy-to-read in-line frequency readout graduated in 10-cycle increments. ±0.5% calibration accuracy. Output for counter where extreme accuracy is desired.

• Incremental-frequency dial lets you fine-tune any component, covers ±100-cycle range independently of analyzer setting.

• AFC follows slowly drifting signals.

• Choice of 3 meter speeds - meter does the averaging.

• Excellent tunable filter. For example, the instrument can be used to produce 3-, 10-, and 50-cycle bands of noise over a tunable range from 20 c/s to 54 kc/s when a random-noise generator is connected to the analyzer.

• Price: Type 1900-A Wave Analyzer alone, $2150; Type 1910-A Recording Wave Analyzer, $3500 in U.S.A.

We believe M. Fourier's disciples will like this Analyzer, too.

Write for Complete Information.

General Radio Company

In Canada: Toronto 247-2171. Montreal (Mt. Royal) 737-3073

In Europe: Zurich, Switzerland - London, England

West Concord Massachusetts

New York, N. Y., 964-2722 (Ridgefield. N. Y.) 943·3140

Chicago (Oak Park) 848-9400

Philadelphia (Ft. Washington) 646-8030

Washington, D.C. (Rockville, Md.) 946-1600

Syracuse 454-9323

Dallas FL 7-4031

San Francisco (Los Altos) 948·8233

Los Angeles 469-6201

Orlando, Fla. 425-4671

Cleveland 886-0150



Posted May 29, 2023
(updated from original post on 10/11/2018)

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    Kirt Blattenberger,


RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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