• Country
• United States of America (USA)

• Manufacturer / Brand
• B&K (Precision), Dynascan Corp., Cobra Electronics; Chicago, IL and Yorba Linda, CA

• Year
• 1977 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 191032

• • alternative name: B&K Manufacturing Company

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Direct and 10:1 test Probe PR-25 - B&K Precision, Dynascan Corp.,

• Dimensions (WHD)
• 160 x 22 x 22 mm / 6.3 x 0.9 x 0.9 inch

• Notes
• Designed for BK Precision 1801 frequency counter; attenuation switch Direct or 10:1; maximum voltage 200Volts combined DC and peak-to-peak AC; frequency response from 20Hz to 50MHz; impedance (connected to Model 1801 Frequency counter) 1 megohms shunted by 10 picoFarad maximum (fixed compensation); increased input impedance and reduced capacitance minimize circuit loading in high-frequency circuits.

• Net weight (2.2 lb = 1 kg)
• 0.1 kg / 0 lb 3.5 oz (0.22 lb)

• Source of data
• -- Original prospect or advert

• Author
• Model page created by Emilio Focosi. See "Data change" for further contributors.

• Other Models

• Here you find 110 models, 106 with images and 44 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from B&K (Precision), Dynascan Corp., Cobra Electronics; Chicago, IL and Yorba Linda, CA