Portable 5 National
Symphony Gramophone and Radio Co. Ltd.; Wolverhampton
- Country
- Great Britain (UK)
- Manufacturer / Brand
- Symphony Gramophone and Radio Co. Ltd.; Wolverhampton
- Year
- 1928 ??
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 159114
edited from ebay pantant 230971710510
edited from ebay pantant 230971710510
edited from ebay pantant 230971710510
- Number of Tubes
- 5
- Main principle
- TRF with regeneration
- Tuned circuits
- 1 AM circuit(s)
- Wave bands
- Broadcast (MW) and Long Wave.
- Power type and voltage
- Storage and/or dry batteries / 2 & 9 & 120 Volt
- Loudspeaker
- Magnetic loudspeaker (reed) generic.
- Material
- Wooden case
- from Radiomuseum.org
- Model: Portable 5 National - Symphony Gramophone and Radio
- Shape
- Portable set > 8 inch (also usable without mains)
- Notes
-
Rare construction technique of shaped brass strips riveted on a baseboard is a precursor to true PCBs.
The MW is actually labelled Shortwave as was common in the 1920s and may not cover all of 540kHz to 1600kHz.
Uses Lead Acid cell for filament (probably Wet, Gel cells are mid 1930s), Winner 120 and 9V Grid Bias batteries.
- Author
- Model page created by Roy Johnson. See "Data change" for further contributors.
- Other Models
-
Here you find 2 models, 2 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Symphony Gramophone and Radio Co. Ltd.; Wolverhampton