• Country
• United States of America (USA)

• Manufacturer / Brand
• Beckman Instruments, Shasta, Shockley; Richmond (CA)

• Year
• 1968

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 167219

• Number of Tubes
• 9

• Valves / Tubes
• NL842 NL842 NL842 NL842 NL842 NL842 NL842 NL842 NL867

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 115; 230 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Counting Unit, Frequency Counter 6380 - Beckman Instruments, Shasta,

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 435 x 90 x 395 mm / 17.1 x 3.5 x 15.6 inch

• Notes
• The Beckman Counting Unit (Frequency Counter) type 6380 features two identical counting inputs X and Y housed in one plug-in type 683, both ranges from DC up to 20 MHz. 5-step attenuator, adjustable trigger point, switchable + or - slope. Has separate AC inputs with blocking capacitors. A second plug-in 675 contains a function selector for resolution, period, time X --> Y, count X, Freq. X. The time base ranges from 0.1 µs to 10 s in decadic steps. The readout section shows the result by a eight-digit nixie tube display, a 9th nixie tube (NL-867) displays the units kHz, MHz, µs, s. Display time can be adjusted. Built-in 5 MHz-OCXO (Oven Controlled Quartz Oscillator) Beckman ACM. Time base output for 1 MHz, an external time base or frequency standard (1, 2.5 or 5 MHz) can be connected at the back. Based mainly on the first generation of SSI ICs (TTL circuits, 7400 series) and some special integrated circuits.

• Author
• Model page created by Bernhard Nagel. See "Data change" for further contributors.

• Other Models

• Here you find 51 models, 43 with images and 18 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Beckman Instruments, Shasta, Shockley; Richmond (CA)