Squareshaper 438A
Dawe Instruments Ltd.; Brentford, Middlesex
- Country
- Great Britain (UK)
- Manufacturer / Brand
- Dawe Instruments Ltd.; Brentford, Middlesex
- Year
- 1965 ?
- Category
- Service- or Lab Equipment
- Radiomuseum.org ID
- 328874
- Number of Transistors
- 2
- Semiconductors
- Wave bands
- Wave Bands given in the notes.
- Power type and voltage
- No Power needed
- Loudspeaker
- - - No sound reproduction output.
- from Radiomuseum.org
- Model: Squareshaper 438A - Dawe Instruments Ltd.;
- Dimensions (WHD)
- 5 x 1 x 1 inch / 127 x 25 x 25 mm
- Notes
-
A sine wave to square wave converter, producing a negative square wave when connected to a conventional oscillator such as Dawe 440B. No power supply is required. Amplitude and frequency of the output is governed by the driving oscillator, up to 30 V within the frequency range 1Hz to 1 MHz. Output amplitude of the negative square-wave produced by the unit for a 25 V rms input is approximately -30 V on open circuit. Tilt is 5% at 5Hz and is negligible from 100Hz to 1MHz, overshoot is always less than 1%.
- Net weight (2.2 lb = 1 kg)
- 0 lb 4 oz (0.25 lb) / 0.114 kg
- Price in first year of sale
- 9.00 £
- Mentioned in
- -- Original-techn. papers. (Electronic Engineering, volume 37 year 1965)
- Literature/Schematics (1)
- -- Original-techn. papers. (Wireless World December 1965 page 628)
- Author
- Model page created by Pier Antonio Aluffi. See "Data change" for further contributors.
- Other Models
-
Here you find 22 models, 18 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Dawe Instruments Ltd.; Brentford, Middlesex