HAL RTTY equipment manuals

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• History of HAL Communications Corp.
• Timeline of HAL products (about half-way down the page)

• HAL Catalog Spring 1979
• Let's Get on Frequency - How to Tune in RTTY Signals by Bill Henry K9GWT
• RF Induced Problems and Solid-State RTTY Terminals by Bill Henry K9GWT
• High Tones, Low Tones, Modem Tones - What Are They and What Do They Mean? by Bill Henry K9GWT
• RTTY Demodulators - You Can't Work 'em If You Can't Hear 'em by Bill Henry K9GWT
• ASCII, Baudot, and The Radio Amateur by Bill Henry K9GWT
• Some HAL Manuals for sale - Surplus Sales of Nebraska

These manuals are for your personal use - NOT FOR RESALE