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Oldest known amateur radio model. Coverage ranges from 15.5 to 115 meters, with optional coils extending the range to 570 meters. Was sold as kit for USD 45,90 with optional metal cabinet for USD 5,25 or pre-build for USD 55.00.
General characteristics
- HAM bands
- ?
- Frequency stability
- ?
- Tuning steps
- Continuous
- Memories
- None
Receiver
- RX-range
- 15,5-26,6 / 23,5-41 / 37,5-65 / 64-115 meter
110-175 / 170-300 / 290 - 570 meter optional - Modulations
- AM
- Sensitivity
- ?
- Selectivity
- ?
- Filters
- ?
- Receiver system
- TRF with regeneration
- IF-frequencies
- ?
- Image rejection
- ?
- Audio output
- ?
Connections
- Antenna
- -
- Impedance
- 50Ω
- Other
- -
Electrical
- Power requirements
- 6 + 45 + 135 + 180 V
- Current drain RX
- ?
- TX
- -
Physical
- Dimensions (w×h×d)
- ?
- Weight
- ?
- Form factor
- Base Station
- Manufactured
- Between 1929 and 1935 in USA
Other features
- Usage
- Amateur / Ham radio operators
- Features + options
- -
- Accessories
- External PSU: National 3580B
- RigReference ID
- 3661
- MPN
- NATIONAL-COMPANY-SW-000004
Manuals, diagrams and brochures
-
No documents available for this particular model.
- Upload relevant documents
New and second-hand prices
Estimating the value of a rig can be challenging. We collect prices paid by real hams over the years to help you estimate the value of a used National Company SW-4. Just bought or sold this model? Let us know what you traded it for and help other ham operators!
Based on historic data, today's second-hand price of the National Company SW-4 is around:
- USD 0.00
These estimates are based on the following prices:
Links & tools
- Search YouTube for National Company SW-4 videos
- Search Google for National Company SW-4 information
- Search Google Images for National Company SW-4
- Search Twitter for National Company SW-4 news
- Search Wikipedia for National Company SW-4 information
- Search the Boat Anchor Manual Archive (BAMA) for National Company SW-4 for manuals and documents (using Google)
About
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