History of the manufacturer
Industrial Radio Service; Saginaw, Michigan
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| Name: | Industrial Radio Service; Saginaw, Michigan (USA) |
| Brand: |
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| Abbreviation: | industr-ra |
| Products: | Model types |
| Summary: |
The Industrial Radio Service was located at Newton and Rust Avenue in Saginaw, Michigan. The company advertised in the 1920' Radio News magazines. Industrial Radio Service - |
| History: |
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Some models:
| Country | Year | Name | 1st Tube | Notes |
|---|---|---|---|---|
| USA | 24 | 404 | Two dials (primary tuning control knobs) | |
| USA | 24 | 404A | Two dials (primary tuning control knobs) | |
| USA | 24 | Ultra-Marvel Type 404 [old] | UV201A | Two dials (primary tuning control knobs) |
| USA | 25 | Ultra-Marvel 4tubes [new] | Three dials (primary tuning control knobs) | |
| USA | 26 | Ultra-Marvel 5tubes [new] | Two dials (primary tuning control knobs) | |
| USA | 26 | Ultrola | Two dials (primary tuning control knobs) | |
| USA | 22 | Baby Ultra 400 | RAC3 | Three stages of RF-amplification, rectification and two stages of AF-amplification employi... |
| USA | 22 | The Ultra Receiver Radio Frequency Amplifier | RAC3 | The Industrial Radio Service Ultra Receiver was advertised in the February 1922 Radio News... |
| USA | 22 | Ultra Receiver 401 & Ultra A.F. Amplifier B403 | RAC3 | Combination: Ultra R.F. Receiver 401 & Ultra A.F. Amplifier B403. Receiving ran... |
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| Data Compliance | More Information |