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WRN/2 Pickup

WRN/2 Pickup ; Commonwealth (ID = 2348320) Microphone/PU WRN/2 Pickup ; Commonwealth (ID = 2348319) Microphone/PU
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WRN/2 Pickup ; Commonwealth (ID = 2348320) Microphone/PU
Commonwealth: WRN/2 Pickup [Microphone/PU] ID = 2348320 826x1210
Select picture or schematic to display from thumbnails on the right and click for download.
For model WRN/2 Pickup, Commonwealth Electronics Pty. Ltd.; Hobart, TAS:
radio & Hobbies Jan 1959 Page 100
 
Country:  Australia
Manufacturer / Brand:  Commonwealth Electronics Pty. Ltd.; Hobart, TAS
Year: 1958 Category: Microphone or Pick-up element
Wave bands - without
Details
Power type and voltage No Power needed
Loudspeaker
Power out
from Radiomuseum.org Model: WRN/2 Pickup - Commonwealth Electronics Pty.
Material Metal case
Notes

Tonearm with magnetic cartridge used with Commonwealth Electronics 12” and 16” transcription turntables.

The pickup is of the wide gap variable reluctance type with cantilever stylus.

Has a design feature which permits the stylus to be changed instantly by removing the front plate complete with stylus, armature and suspension as a unit, thus eliminating the need for small electrical contacts or pins between the pickup head and tone arm. The plate is held in place magnetically and located by two dowel pins.

Advertised for £25/12/-  complete with matching transformer in January 1959.

SPECIFICATIONS MECHANICAL;

Stylus Pressure

Approximately 6 grams. Operation is
satisfactory down to 3 grams, but the
above figure has been selected as the best compromise.

Lateral Compliance at stylus Tip

Not less than 5 x 10 - 6 cm/dyne.

Vertical Compliance

Not less than 2 x 10 - 6 cm/dyne.

Effective Mass to Lateral  Movement

Approx. 2.5Mg.

Effective Mass to Vertical Movement

Approx. 1.5Mg.

Stylus Radius.

0.001" for microgroove records.
0.0025" for standard records.

Stylus Change

Removable front plate assembly.

Suspension

Bonded neoprene.

Tracking error

Less than 40

Tone-arm Mounting Centres

12" Model – 7.6”   16" Model – 10.75".

Counterweight Overhang

12" Model – 2.5”   16" Model - 3"

 

SPECIFICATIONS ELECTRICAL;

Frequency Response

Microgroove or standard stylus
Within + or - 2dB, 20-14000 Hz

Intermodulation

Less than 2% measured at 100 Hz. And 7000 Hz. (Cook record).

Tone Arm Resonance

20 Hz + or – 5Hz.

Output Voltage

Approx. 10/MV/CM in 150,000 ohms.

Load Impedance Transformers

Available in 50, 200, 500 or l50k ohms balanced.

Price in first year of sale 25.60 AUS £
Mentioned in -- Original prospect or advert (Radio & Hobbies, Jan 1959, page 100)

Model page created by Gary Cowans. See "Data change" for further contributors.



All listed radios etc. from Commonwealth Electronics Pty. Ltd.; Hobart, TAS
Here you find 8 models, 8 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



  
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