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History of the manufacturer  

Precision Apparatus Co. (Pacotronics); Brooklyn - Elmhurst - Glendale, NY / Chicago, IL

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Name: Precision Apparatus Co. (Pacotronics); Brooklyn - Elmhurst - Glendale, NY / Chicago, IL    (USA)  
Abbreviation: precis-2

Precision Apparatus Corporation
821 East New York Ave., Brooklyn, NY (1936)

Precision Apparatus Co.
647 Kent Ave., Brooklyn, NY (1941)

Precision Apparatus Company, Inc.
92-27 Horace Harding Blvd, Elmhurst 4, NY (1947)
70-31 84th St., Glendale 27, Long Island, NY (1954)

Precision Apparatus, Inc. (from 1963)
80-00 Cooper Ave., Glendale, NY 11227 (1964)

Precision Apparatus Division of Dynascan Corp.
1801 W. Belle Plaine Ave, Chicago IL 60613 (1967)

Pace Electrical Meters was a wholly-owned subsidiary of Precision Apparatus. PACO Electronics was the division for equipment in kit form.

Pacotronics was the parent company of all three companies. The name appears from around 1960 -  the exact ownership circumstances are currently unknown. Later tube testers like model 612 carry the "P" logo of Pacotronics, along with the statement "Precision - Test Instruments by Pacotronics", and the address of Precision Apparatus Co. on their documentation.

Founded: 1932

In 1932, Solomon M. Weingast and Murray I. Menther formed a partnership (50-50%) under the firm name and style of Precision Apparatus Corporation. On March 27, 1946, the partnership was incorporated as Precision Apparatus Co. Inc.

In November 1951, Precision Apparatus was forbidden to use false, misleading and deceptive statements about their series 910, 912, 915, 620 and 922 instruments to be "Dynamic Mutual Conductance Type Tube Testers". This already started in 1940 as "Combination dynamic mutual conductance tube tester, 33 range rotary selective A, C.-D. C. Multi-Range set tester." (Order 48 F.T.C.). 

Precision moved from Elmhurst to a new plant in Glendale, Long Island by mid-summer of 1954. The new facilities consisted of about 21,300 square feet and about 14,000 square feet of additional open space. They also provided room for Pace, Precision's subsidiary for meters and other electrical instruments.

In a proceeding before the NY Supreme Court, December 27, 1956, Precision sucessfully petitioned against Precision Meter Co. for unfair competition - enjoining the latter from the continued use of the name Precision Meter Co.

From ca. 1959 on, PACO Electronics was the kit division of Precision for the sales of measurement instruments and Hi-Fi equipment in kit form.

In ca. 1967, Precision was sold to Dynascan, but continued to exist as a division.

This manufacturer was suggested by Georges Van Campenhout.

Some models:
Country Year Name 1st Tube Notes
USA  48 Sweep Signal Generator E-400 6J6  Generator frequency 2-240 MHz, sweep frequency deviation 0-1 MHz and 0-15 MHz. 
USA  57 Signal Generator E-200-C [6AU6] 6AU6  The Signal Marking Generator E-200-C can generate for band A: 88-250 kc; band B: 220-600 k... 
USA  40 Signal Generator E200 6SJ7  Signal Marking Generator:A:88-250 kc (Khz); B:220-600 kc. C:550-1.700 kc. D:1'5-5 mc (Mhz)... 
USA  40–47 Electronamic Tube Tester / Dynamic Electronometer 910 80  Same as Serie 920, but without multitester features. 3 in. meter. 
USA  48 Multi Range Tester 40   1000 ohms/volt sensivity AC and DC. Bakelite case with anodized aluminum face plate. R... 
USA  51 Vacuum Tube Voltmeter (VTVM) EV-20 6C5  Voltage-regulated bridge type circuit. 
USA  51 VTVM Megohmeter EV-10AP   Voltage-regulated bridge-type circuit. 
USA  51 Oscilloscope ES-500 2X2  MV sweep 10 cps to 30 kc. 
USA  51 Multi-Range Tester 85   6 ranges in decibels, -26 to +70. 
USA  47 54 Range Dual Sensivity Tester 858-P   Push-button selection of ranges and functions. Requires 3 x 1.5V Eveready 935 and 1 x 1... 
USA  56 Deluxe Oscilloscope ES-550   Response within 1 dB, 10 cps to 3.5 mc, 3 dB at 5 mc. Sweep frequency, 10 cycles to 100 kc... 
USA  54 Deluxe Oscilloscope ES-520   Sweep frequency 10 cps to 30 kc. 


Further details for this manufacturer by the members (rmfiorg):


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Precision Apparatus Co. (Pacotronics); Brooklyn - Elmhurst - Glendale, NY / Chicago, IL
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Precision and similar companies
Mark Hippenstiel

James F. Mauk's book "Industrial research laboratories of the United States" of the National Research Council (U.S.), Tenth Edition, 1956, has the following entries:

2978: Precise Development Corporation (Pres: Jerome C. Merican), 2 Neil Ct., Oceanside, N.Y.
2979: Precise Measurements Company (Dir.of Research: Harold Pallatz), 942 Kings Hgwy., Brooklyn 23, N.Y.C., N.Y. with a laboratory at 2518 Coney Island Ave., Brooklyn 23, N.Y.C., N.Y.
2980: Precision Apparatus Company, Inc., Glendale 27, L..I, N.Y.
2981: Precision Clinical and Analytical Laboratory, Chicago
2982: Precision Grinding Wheel Company, Philadelphia
2983: Precision Scientific Company, Chicago
2984: Precision Testing Laboratories, Worcester, Mass. 

There are a number of similarily named companies already mentioned in

Precision Apparatus Co. (Pacotronics); Brooklyn - Elmhurst - Glendale, NY / Chicago, IL
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