Sound Level Meter YF-20
Yu Fong Electric Co. Ltd., YFE; Taipei
- Country
- Taiwan (Republic of China)
- Manufacturer / Brand
- Yu Fong Electric Co. Ltd., YFE; Taipei
- Year
- 1998 ?
- Category
- Service- or Lab Equipment
- Radiomuseum.org ID
- 237021
2N2222A transistor and Uranus capacitors
- Number of Transistors
- Main principle
- Audio-Amplification
- Wave bands
- - without
- Power type and voltage
- Dry Batteries / 9 Volt
- Material
- Plastics (no bakelite or catalin)
- from Radiomuseum.org
- Model: Sound Level Meter YF-20 - Yu Fong Electric Co. Ltd., YFE
- Shape
- Very small Portable or Pocket-Set (Handheld) < 8 inch.
- Dimensions (WHD)
- 160 x 65 x 38 mm / 6.3 x 2.6 x 1.5 inch
- Notes
-
YFE YU FONG Sound Level Meter model YF-20 specifications: JIS dB(A) specification; Range 40-80dB, 80-120dB; Microphone capacitive type; Calibration with internal signal oscillator; Battery indicator.
Semiconductors inside: 6 x 2N2222A NPN Si, 1 x PN2907A PNP Si, 1 x IC TA7120P-C Audio Amp (dated as of 1998 week 28), 4 x 1N914 Si Diodes, and 8 x Glass Germanium Diodes.
- Net weight (2.2 lb = 1 kg)
- 0.165 kg / 0 lb 5.8 oz (0.363 lb)
- Author
- Model page created by Jose Mesquita. See "Data change" for further contributors.
- Other Models
-
Here you find 24 models, 19 with images and 14 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Yu Fong Electric Co. Ltd., YFE; Taipei
Collections
The model Sound Level Meter is part of the collections of the following members.