Oscillator 1281
AVO Ltd.; London
- Country
- Great Britain (UK)
- Manufacturer / Brand
- AVO Ltd.; London
- Year
- 1934
- Category
- Service- or Lab Equipment
- Radiomuseum.org ID
- 239013
- Number of Tubes
- 1
- Valves / Tubes
- HL2
- Wave bands
- Wave Bands given in the notes.
- Power type and voltage
- Storage and/or dry batteries / 120 & 2 Volt
- Loudspeaker
- - - No sound reproduction output.
- Material
- Metal case
- from Radiomuseum.org
- Model: Oscillator 1281 - AVO Ltd.; London
- Shape
- Tablemodel, with any shape - general.
- Notes
-
Battery powered, AM Signal Generator using a harmonic oscillator.
Wavebands: 100kHz - 1500kHz.
The Triode Oscillator covers the band, 100kHz to 280kHz. For frequencies to 1500kHz harmonics are used.
Modulation on/off switch adds an extra capacitor on the RF oscillator to create audio frequency instability, "squeeging" of around 500Hz.
Low, Medium and High, RF output levels connectors are available.
Batteries: Probably 2V Lead Acid Gel cell (100mA LT consumption) and 120V Dry Cell HT pack with integral grid tap if required (see Ever Ready Winner 120GB and the Portable 56 for example of taps)
- Mentioned in
- Wireless World (The), London (WW, 79) (Nov 2, 1934, Pages 357 & 358.)
- Author
- Model page created by Michael Watterson. See "Data change" for further contributors.
- Other Models
-
Here you find 82 models, 79 with images and 41 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from AVO Ltd.; London