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My Feld-Hell machine from PAŘCX |
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History and patents |
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How it works |
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Photos |
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3D photos |
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Electronic circuitry |
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The RV12P4000 tube |
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Interfaces to transceiver |
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Maintenance |
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Sounds from Hell |
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Presentation (in work) |
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Hell 72b/c "GL", and Hell 73 "AGL" |
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Hell-80 |
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Modern "software" modes (FM, MT, etc.) |
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Other Siemens Hellschreibers |
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Other manufacturers |
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My Hell-printer |
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Other homebuilts |
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Hell/CW filter |
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Hellschreiber software |
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Soundcard interfacing |
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Hellschreiber |
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German 1930s-40s radio technology |
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Frequencies, nets |
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Contests, activities |
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Annual Hell Meeting |
