Universal Frequency Recorder D61A
Universal Microphone Co. Ltd.; Inglewood (CA)
- Country
- United States of America (USA)
- Manufacturer / Brand
- Universal Microphone Co. Ltd.; Inglewood (CA)
- Year
- 1947
- Category
- Miscellaneous (Other, Various) - see notes
- Radiomuseum.org ID
- 225029
- Wave bands
- - without
- Loudspeaker
- - - No sound reproduction output.
- from Radiomuseum.org
- Model: Universal Frequency Recorder D61A - Universal Microphone Co. Ltd.;
- Shape
- Miscellaneous shapes - described under notes.
- Notes
-
The new pressing of the D61A frequency check record offers "double value" over the old, being recorded on two duplicating sides. Designed for direct checking of the response characteristics of phono pickups, lateral disc recording and reproducing systems, it is populary used also for checking amplifiers, loudspeakers, room acoustics, etc. On a 12 inch Vinylite 78 RPM disc, it covers from 50 to 10,000 cycles in three volume steps, each identified, then produced 1000 cycles in 6 steps of 2 db, and finally 400 cycles at steady 18 db.
- Source of data
- Radio Retailing (Radio & Television R.)
- Author
- Model page created by Heiko zur Mühlen. See "Data change" for further contributors.
- Other Models
-
Here you find 14 models, 12 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Universal Microphone Co. Ltd.; Inglewood (CA)