Ultra-Marvel Type 404 old
Industrial Radio Service; Saginaw, Michigan
- Country
- United States of America (USA)
- Manufacturer / Brand
- Industrial Radio Service; Saginaw, Michigan
- Year
- 1924
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 44871
- Number of Tubes
- 3
- Main principle
- TRF (Tuned-Radio-Frequency but use of regeneration unknown); 1 AF stage(s); Reflex
- Wave bands
- Broadcast only (MW).
- Power type and voltage
- Storage and/or dry batteries
- Loudspeaker
- - This model requires external speaker(s).
- Material
- Wooden case
- from Radiomuseum.org
- Model: Ultra-Marvel Type 404 [old] - Industrial Radio Service;
- Shape
- Tablemodel, Box - most often with Lid (NOT slant panel).
- Notes
- Two dials (primary tuning control knobs)
- Price in first year of sale
- 70.00 $
- External source of data
- Ernst Erb
- Source of data
- Radio Collector`s Guide 1921-1932
- Literature/Schematics (4)
- Radio News (January 1924, Advertisement on page 964)
- Other Models
-
Here you find 9 models, 4 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Industrial Radio Service; Saginaw, Michigan