Convette HL4
Amplion, Alfred Graham & Co. (Algraphone); London
- Country
- Great Britain (UK)
- Manufacturer / Brand
- Amplion, Alfred Graham & Co. (Algraphone); London
- Year
- 1950 ??
- Category
- Power supply/conditioner or battery or charger
- Radiomuseum.org ID
- 248997
Earthed Mains cable added for safety.
- Number of Transistors
- Semiconductors
- Metal-rectifier Metal-rectifier
- Wave bands
- - without
- Details
- Power Supply (not only Batt.El.)
- Power type and voltage
- Alternating Current supply (AC) / 200-250 Volt
- Loudspeaker
- - - No sound reproduction output.
- Material
- Metal case
- from Radiomuseum.org
- Model: Convette HL4 - Amplion, Alfred Graham & Co.
- Shape
- Chassis only or for «building in»
- Dimensions (WHD)
- 2.5 x 4 x 2 inch / 64 x 102 x 51 mm
- Notes
-
Fits in space for a B126 90V HT pack and also replaces the LT pack. LT load must be 125mA or 250mA or the nominal 1.4V LT will be wrong. Mains should only be connected when the radio is already on. Uses a screw at front to select 125mA or 250mA load. The screw either does nothing or adds a 125mA Ballast resistor. The HT is about 100V at 8mA and probably up to 12mA load. There is no regulation. HT is halfwave C R C smoothing and LT is fullwave (centre tapped winding) and uses 2 x C with a Choke which also acts as DC dropper resistance. The later 125mA only model is LC126.
Three internal Mains voltage taps under cover.
"Hammerite" finish on steel box with anodised aluminium lid.
Warning: No earth on mains cable and little clearance to case so isolation should be checked.
- Author
- Model page created by Michael Watterson. See "Data change" for further contributors.
- Other Models
-
Here you find 98 models, 78 with images and 9 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Amplion, Alfred Graham & Co. (Algraphone); London
Collections
The model Convette is part of the collections of the following members.